Inventors list

Assignees list

Classification tree browser

Top 100 Inventors

Top 100 Assignees


Wind

Subclass of:

290 - Prime-mover dynamo plants

290007000 - ELECTRIC CONTROL

290043000 - Fluid-current motors

Patent class list (only not empty are listed)

Deeper subclasses:

Entries
DocumentTitleDate
20080277937Torque Motor Type Wind Generator - A torque motor type wind generator comprises: a blade rotor, an engine room, a torque motor, a voltage regulator, a voltage transformer, a power storage system, and a control system. The blade rotor is connected with a connecting shaft, the engine room is a housing with a receiving space, the torque motor has a rotator shaft which is driven to rotate by electromagnetic-force, the voltage regulator includes a regulating circuit and a switch circuit, the power storage system serves to store electric energy, and the control system is employed to detect the status of power storage for facilitating the control of the electric energy input. The assembly of the abovementioned structures converts wind energy into mechanical energy or electrical energy.11-13-2008
20080277936METHOD OF OPERATING A WIND POWER INSTALLATION AND A WIND POWER INSTALLATION - The present invention concerns a method of operating a wind power installation comprising an electric generator drivable by a rotor for outputting electrical power to an electrical consumer, in particular an electrical network.11-13-2008
20110175355TURBINE FARM HAVING AN AUXILIARY POWER SUPPLY - A turbine farm comprises a plurality of individual turbines each having an auxiliary component circuit. The farm further comprises; a master transformer arranged to be coupled between each of the plurality of individual turbines and an electrical grid and an auxiliary transformer coupled between the sub-station transformer and the auxiliary component circuit in each of the individual turbines. When in use power is transmitted from the sub-station transformer back to each auxiliary component circuit.07-21-2011
20130026759DYNAMIC INERTIA REGULATION - A wind energy installation having a wind rotor, a generator which is driven thereby and interacts with a converter in order to produce electrical power, rotation-speed regulation and converter control which interacts therewith, wherein the rotation-speed regulation outputs a nominal rotation speed signal (n01-31-2013
20120200085WIND ENERGY GENERATING SYSTEM - A wind energy generating system includes a driving unit driving a shaft and a power generating module is connected to the driving unit and includes a first stator and a first rotor which rotates relative to the first stator. A blade is fixed to the first rotor by a link. A solar power unit is fixed to the power generating module. A power storage unit is located in the driving unit and a control unit is connected to the driving unit. A detection unit is electrically connected to the control unit. The first rotor rotates relative to the first stator to generate electric power and the detection unit detects the speed of the blade and adjusts the speed of the shaft to increase the relative speed between the first rotor and the first stator, or to slow the speed of the relative speed to protect the blade.08-09-2012
20130026757WIND ENERGY PLANT HAVING A BLADE HEATER - A wind energy plant comprising a rotor having blades and a generator driven by said rotor for generating electric energy. The pitch of the blades can be adjusted and a pitch system for adjusting the pitch angle of the blades is provided, which is supplied by a hub power source. An additional electric load is provided on the hub. A pitch power control device is provided which dynamically distributes the power of the hub power source between the pitch system and the additional electric load and further acts on the pitch system such that the power consumption thereof during high-load operation is reduced. Thus, the power consumption of the pitch system during high-load operation can be reduced and additional power provided for operating the additional load. Even high-performance additional loads, such as a blade heater, can be operated in this way, without having to boost the hub power source.01-31-2013
20130026758METHOD FOR CONTROLLING AEROGENERATORS FOR PRODUCING ELECTRICAL ENERGY - A method for controlling an aerogenerator (01-31-2013
20130026756METHOD AND ARRANGEMENT FOR OPERATING A WIND FARM WITHIN VOLTAGE LIMIT - A method for determining a limit value of a wind turbine reference operational variable is described The wind turbine being connected to a connection node to which a utility grid is connected. The method includes: obtaining a first input signal indicative of a connection node limit voltage; obtaining a second input signal indicative of a connection node voltage; and determining the limit value of the wind turbine reference operational variable based on the first signal and the second signal. Further a corresponding arrangement is described.01-31-2013
20090206606Variable Speed Wind Turbine Configured For Wind Farm Operation - The present invention relates to an improved wind turbine, of the type which employs doubly fed induction generators (DFIG), and a wind park including the same, which permits the use of lighter weight turbines, with the ability to have greater energy capture, more precise control of asymmetrical phases and enhanced maintenance and support of the grid during fault conditions.08-20-2009
20120161444WIND TURBINE PROVIDING GRID SUPPORT - A variable speed wind turbine is configured to provide additional electrical power to counteract non-periodic disturbances in an electrical grid. A controller monitors events indicating a need to increase the electrical output power from the wind turbine to the electrical grid. The controller is configured to control the wind turbine as follows: after an indicating event has been detected, the wind turbine enters an overproduction period in which the electrical output power is increased, wherein the additional electrical output power is taken from kinetic energy stored in the rotor and without changing the operation of the wind turbine to a more efficient working point. When the rotational speed of the rotor reaches a minimum value, the wind turbine enters a recovery period to re-accelerate the rotor to the nominal rotational speed while further contributing to the stability of the electrical grid by outputting at least a predetermined minimum electrical power.06-28-2012
20120161443WIND TURBINE - A wind turbine utilizes a rotor assembly rotating about a substantially horizontal shaft, wherein said rotational motion is converted to a substantially vertical rotational motion through a shaft extending down from the nacelle located near the top of the tower structure to a mechanical room located at a lower altitude relative to the top of the tower. Said lower mechanical room houses some of the large heavy operational components of the turbine such that the turbine is not as top heavy as conventional turbines, and maintenance of the turbine is improved through ease of access to the lower altitude mechanical room.06-28-2012
20110204631HANDY TERMINAL FOR WIND TURBINE GENERATOR - A handy terminal for a wind turbine generator which the maintenance of the wind turbine generator, especially the maintenance work inside the nacelle, can be simplified while considering the safety of the maintenance operator. The handy terminal comprises a tower provided to stand on land or off-shore, a nacelle supported on the tower to be controlled to rotate in the yaw direction and a plurality of rotatable blades attached to the nacelle to be controlled to move their pitch, whereby the handy terminal is connectable to connecting ends respectively provided on the lower portion of the tower and the nacelle so as to perform various control of the wind turbine generator, the handy terminal further comprising: an operation button for generating operation signals for various control devices that are incorporated into a control circuit in the wind turbine generator; a display portion for displaying the operating state of the operation button; and a control portion for performing display control of the operation button, wherein the control portion of the operation button makes a mode selecting button to appear that selectively enables a maintenance mode or an operating mode of the wind turbine generator, and makes an operation button to appear that separately controls at least one of: a blade pitch control, a yaw brake control and an accessory motor provided on an oil circuit to control the blade pitch control and the yaw brake control that are incorporated in the wind turbine generator, correspondingly to a corresponding maintenance operation screen displayed on the display portion when the maintenance mode is selected from the selecting button.08-25-2011
20100060001WIND TURBINE SAFETY SYSTEM AND METHODS - A wind turbine for extracting energy from the wind and providing electrical energy to a load. The wind turbine may include a rotor arranged to drive a generator, and an electronic controller for connecting the generator to an electrical load. The electronic controller operates to reduce the tip speed ratio of the turbine rotor as wind speed increases. The rotor is designed have a power coefficient at low values of tip speed ratios that becomes negative for wind speeds exceeding a predetermined wind speed value. The electronic controller cooperates with the turbine rotor such that the turbine rotor looses a positive power coefficient and the wind turbine slows when wind speeds exceed the predetermined wind speed value.03-11-2010
20100148508CONTROL METHOD AND APPARATUS - A method and a controller for controlling a wind power generation system is disclosed. The system is connected to a grid at a point of connection, and is devised to feed reactive power to the grid in order to improve grid stability. A Q-V characteristic is determined for the grid at the point of connection as well as a nose point for the Q-V characteristic. A minimum reactive current, I06-17-2010
20090194995POWER GENERATION STABILIZATION CONTROL SYSTEMS AND METHODS - A stabilization system for a power generation system including non-conventional energy source coupled to a utility grid, the stabilization system comprising: a deadband limiter configured for detecting when a signal of the power generation system is outside of a signal range; a power shaper configured for providing a transient power generation adjustment signal in response to the signal being outside of the signal range; and a limit controller to configured to prevent the adjustment signal from causing the energy source of the power generation system to operate outside of at least one operating constraint.08-06-2009
20100052322WIND ENERGY INSTALLATION WITH NEGATIVE SEQUENCE SYSTEM REGULATION AND OPERATING METHOD - A wind energy installation can include a generator which is driven by a rotor and generates electrical power in a multiphase manner for feeding into a network, a converter which is connected to the generator and to the network, and a control system which interacts with the converter and includes a negative sequence system regulation mechanism. The negative sequence system regulation mechanism can include a phase control module configured to determine an electrical variable of the negative sequence system according to the phase. Accordingly, an available current can be provided according to the operating situation for active power or idle power in the negative sequence system regulation mechanism. The negative sequence system regulation mechanism can thus help stabilize the network in the event of asymmetrical network conditions. Also, this relates to a correspondingly equipped wind park and an operating method.03-04-2010
20100140937WIND TURBINE STARTING - A method of providing power from a wind generator includes sending a request to supply power to an operator of a power distribution network; receiving an authorization to supply power from the power distribution network operator; and connecting the wind generator to the power distribution network in response to the authorization to supply power.06-10-2010
20110187109Wind Power Generation Apparatus, Wind Power Generation System and Power System Control Apparatus - A power system control apparatus which controls a power system electrically connected to a wind power generation apparatus having a wind turbine which receives wind and rotates, a generator which generates electric power by the rotating wind turbine, and a power converter which converts the electric power generated by the generator. The power system control apparatus includes a voltage detector for detecting a voltage of the power system, a reactive power command value generation unit for generating a reactive power command value from a voltage detection value of the voltage detector, and a transmission unit for transmitting the reactive power command value to the wind power generation apparatus. Output fluctuation of the generator is suppressed, and reactive power according to the reactive power command value is transmitted from the wind power generation apparatus to the power system.08-04-2011
20110193345WIND TURBINE GENERATOR - An object is to provide a wind turbine generator that is capable of continuously operating an auxiliary unit even when a grid fault occurs. Provided is a wind turbine generator including an auxiliary-unit breaker provided in a power line that connects an auxiliary unit to a power grid, wherein the auxiliary-unit breaker has a current-resisting capacity within a range that tolerates a current that flows in a low-voltage event and does not exceed a tolerable current of a motor provided in the auxiliary unit.08-11-2011
20110193344Control Network for Wind Turbine Park - A wind park comprising a plurality of wind turbines that are coupled to each other via a control network. Control data, for example, data derived from sensors may be exchanged between the wind turbines via the control network, thereby allowing the wind turbines of the wind park to adjust operational parameters based on data received from other wind turbines of the wind park.08-11-2011
20110193343WIND TURBINE GENERATOR AND BLADE PITCH ANGLE CONTROL METHOD THEREOF - The present invention provides a wind turbine generator and a blade pitch angle control method thereof in which an aerodynamic imbalance of a wind turbine rotor at the time of shutdown is further reduced, the maximum load of a wind turbine is further reduced, and the wind turbine generator can be reduced in weight and cost. The wind turbine generator includes a collective pitch angle controller 08-11-2011
20120175879GENERATOR - A wind turbine assembly comprising, an elongate generally cylindrical rotor operable to rotate about an axis, an elongate rotor housing that houses the rotor and which is adapted to be secured to a roof, and a flow regulator adapted to regulate wind flow to the rotor, wherein the flow regulator is orientatable in an open orientation, a closed orientation and a partially open orientation.07-12-2012
20090212566METHOD FOR OPERATING A WIND ENERGY PLANT AND WIND ENERGY PLANT - The invention relates to a method for operating a wind energy plant, the wind energy plant having a rotor with at least one rotor blade which has an adjustable pitch angle, the wind energy plant having a generator coupled to the rotor, and a regulation means which, if a there is a deviation of the rotation speed of the generator or rotor from a rotation speed set point, adjusts the pitch angle of the at least one rotor blade such that the rotation speed set point is reached again, wherein an electrical quantity provided by the wind energy plant by means of a generator and fed into a grid is reduced to a predetermined value in a short time by a reduction of a preset value for the generator, wherein prior to the regulation means noticing a deviation of the rotation speed of the rotor or generator from the rotation speed set point effected by the reduction of the preset value, an adjustment of the at least one rotor blade to a new pitch angle is initiated, wherein at the new pitch angle the rotation speed of the rotor or the generator reaches the rotation speed set point at the reduced electrical quantity and the current wind speed. In addition, the invention relates to a wind energy plant.08-27-2009
20100117361Wind Turbine, A Method For Compensating For Disparities In A Wind Turbine Rotor Blade Pitch System And Use Of A Method - A wind turbine includes a rotor having one or more rotor blades, a pitch system for controlling the pitch angle of the one or more rotor blades, the pitch system having at least one pitch actuator, a pitch controller for generating pitch actuator control signals and sensor elements for establishing values of pitch performance parameters, and a compensation controller to compensate for disparities between the pitch actuator control signals and the values of pitch performance parameters, according to a control algorithm. The compensation controller is arranged to adjust parameters of the control algorithm of the compensation controller in dependency of the disparities.05-13-2010
20100072751Variable Speed Wind Turbine, A Resonant Control System, A Method Of Operating A Variable Speed Wind Turbine, Use Of A Resonant Control System And Use Of A Method In A Variable Speed Wind Turbine - A variable speed wind turbine connected to a utility grid includes a rotor, having at least one blade, a drive train connected to the rotor, the drive train includes a selection of at least one gear box, and at least one electrical generator, a measuring arrangement establishing at least one rotational speed signal of the drive train, and at least one wind turbine power controller connected to the at least one generator and the utility grid. Furthermore the wind turbine includes at least one resonant controller modifying a power reference value in response to the at least one rotational speed signal. A resonant control system, a method of operating a variable speed wind turbine, use of resonant control system and use of a method in a variable speed wind turbine are also contemplated.03-25-2010
20130076036METHOD AND DEVICE FOR POWER GENERATION - A fluid flow-powered generator and a method for using the same are described herein. The generator has a rotatable frame, with a first wing and a second wing. The first wing and second wing are pivotally mounted to the frame to allow the angle of attack to be adjusted. A controller is also provided to direct adjustment of the angle of attack of the first wing and the second wing in a coordinated manner while the fluid flow-powered generator is in use. In certain embodiments, the fluid flow-powered generator is operable as an oscillating generator and in other embodiments, the fluid flow-powered generator is operable as a rotating generator. The rotating generator can be arranged along a horizontal axis or a vertical axis. Additionally, certain horizontally oriented generators may be operated as either oscillating generators or rotating generators.03-28-2013
20130033040METHOD AND APPARATUS FOR PROTECTING WIND TURBINES FROM DAMAGE - A wind turbine has a Lidar device to sense wind conditions upstream of the wind turbine. Signals from the wind turbine are processed to detect an extreme event. On detection the system controller takes the necessary evasive action depending on the nature and severity of the extreme condition detected. This may include a significant reduction in power generated, complete shutdown of the generator and yawing of the nacelle and rotor to reduce loading on the rotor blades.02-07-2013
20130076037METHOD AND CONTROL ARRANGEMENT FOR CONTROLLING CENTRAL CAPACITORS IN WIND POWER PLANTS - The present invention relates to a control system and an associated method for controlling an amount of reactive power delivered from a wind power plant to an associated power supply grid, the control system comprising a wind power plant controller and a number of wind turbine controllers each being in communication with said wind power plant controller, wherein the wind power plant controller is adapted to provide a grid voltage reference in response to a required total amount of reactive power to at least one wind turbine controller and operating a Switched Capacitor bank.03-28-2013
20100032949SYSTEM AND METHOD FOR ALTERING DRAG AND LIFT FORCES ON A WIND CAPTURING STRUCTURE - The present disclosure provides a method and system for altering the drag force on a wind capturing structure. First, the present disclosure implements a new bridle system. Mainline 02-11-2010
20090121485WIND POWER FACILITY HAVING ACTIVATION CIRCUIT FOR A SPEED-LIMITED AND VOLTAGE-SOURCE-PROTECTIVE OPERATION OF A PITCH -DRIVE SERIES-WOUND MOTOR AT GENERATOR TORQUES - A wind power facility includes an activation circuit for a speed-limited and voltage-source-protective operation of a pitch-drive series-wound motor at generator torques. The activation circuit can comprise a pitch-drive series-wound motor, in which armature winding and exciter winding are connectable separately from one another, a load resistor R05-14-2009
20090121482VARIABLE SPEED POWER GENERATOR HAVING TWO INDUCTION GENERATORS ON A COMMON SHAFT - A variable speed power generator system, includes a primary power induction generator (05-14-2009
20130088010PITCH SYSTEM FOR A WIND ENERGY SYSTEM AND METHOD FOR OPERATING A PITCH SYSTEM - A pitch system of a wind energy system includes an emergency energy store for moving a rotor blade into a safety position in the event of the failure of an external energy supply. The emergency energy store can be tested, for example to assess aging, by supplying electrical energy to an actuating device configured to set a pitch angle of a rotor blade even in a normal operating mode of the wind energy system temporarily exclusively from the emergency energy store. This configuration ensures reliable operation of a wind energy system.04-11-2013
20130088009Method to Prevent Over Torque of Yaw Drive Components in a Wind Turbine - A method for preventing over torque and failure of yaw system components in a wind turbine is disclosed. The method may include providing a yaw system having a yaw drive including a drive motor for facing a nacelle positioned on the yaw system in a preferred wind direction. The method may also include preventing operation of the drive motor beyond a normal operating region on a torque-speed curve of the drive motor to avoid torques that may damage the yaw system components.04-11-2013
20100045041Method Of Operating A Wind Turbine With Pitch Control, A Wind Turbine And A Cluster Of Wind Turbines - A method of operating a wind turbine with pitch control, in which values of the generated power and the operating speed of the rotor are established at a discrete number of secure ranges for wind speeds above a critical wind velocity. A wind turbine and a cluster of wind turbines employing such a method are also contemplated.02-25-2010
20100045039Vertical axis wind turbine - This invention is for a vertical axis wind turbine apparatus supported in a tower with wind diverter doors for controlling the air impinging on the turbine blades. The diverter doors are closable in high wind conditions to seal off the wind turbine to protect the turbine against damage.02-25-2010
20100045037POWER GENERATION SYSTEM USING WIND TURBINES - A new wind turbines system extracts dynamic energy from ambient sources and generates power with high efficiency. The less-fluctuated slower-speed turbines have a high-ratio gear reducer to increase the high-power DC generator's speed. An analog/digital voltage converting sampler, a digital signal processor, a power battery charging/discharging regulator, and a power output in steady and continuous states meet its power generation safety and security requirements, which may produce power at about 50% efficiency. A power regulator stabilizes the fluctuations of the incoming power and regularizes its power outputs in steady and continuous states. A high ratio gear reducer (1:100=1:10×10 in two stages) increases its generator's speed and meets power generation requirements. The lower pole of larger blades' surface area using light-weight nylon fabric single-surfaced blade layer with strong angled strut support structure more efficiently converts power into electricity, and their conservation processes cut installation capital and maintenance costs.02-25-2010
20100102558CONTROL SYSTEM FOR WIND ENERGY CONVERTERS - A wind energy converter configured for transmitting power to an electric grid includes a variable ratio gear system mechanically coupled between a rotor and a generator. A control system is configured to mechanically control a rotational speed of the generator so that, during a low voltage event, the wind energy converter can continue to operate and supply power to the grid.04-29-2010
20100096853METHOD FOR THE OPERATION OF A WIND ENERGY PLANT WITH A DOUBLE-FED ASYNCHRONOUS GENERATOR AND WIND ENERGY PLANT WITH A DOUBLE-FED ASYNCHRONOUS GENERATOR - A method for the operation of a wind energy plant with a double-fed asynchronous generator which has a mode of operation as a phase shifter, in which reactive power is fed into the electric power supply grid, the method having the following steps: the stator of the asynchronous generator is short-circuited, the asynchronous generator is run-up to a predetermined rotational speed from a working rotational speed range via a converter after running up, the short-circuit in the stator is cancelled, the double-fed asynchronous generator is synchronised with the electric power supply grid, and it is driven for the generation of reactive power.04-22-2010
20090160189Priority System For Communication In A System Of At Least Two Distributed Wind Turbines - The invention relates to a system of at least two distributed wind turbines where the at least two wind turbines communicate via a data communication network, the data communication network communicates monitoring and control data (MCD) to and from the at least two wind turbines (WT), the data communication network communicates power control related data (PCRD) to and from the at least two wind turbines (WT), the power control related data (PCRD) has higher transmission priority than a subset of the monitoring and control data (MCD) and where the transmission priority is defined in relation to a protocol.06-25-2009
20090160188Migler's windmill as a lamppost-windmill, and with sails mounted on a common mast, and with horizontally yoked sails, and as a river-turbine, and as a windmill-sailboat - The disclosure presents several embodiments of Migler's vertical axis windmill. In the first, the windmill is adapted as a windmill-lamppost which stores electrical energy during daylight and operates the lamps at night. In the second, some sail restraints are eliminated by mounting sails on a common mast. In the third, a yoke allows sails to be mounted close together on a horizontal arm and also eliminates some sail restraints. In the fourth, Migler's vertical axis windmill is submerged in a river, with additional generators used to harness the slow movement of the water. In the fifth, a boat is powered by Migler's vertical axis windmill using direct drive of the propeller. In the sixth, a boat is powered by Migler's vertical axis windmill using a transmission to enhance propeller speed. In the seventh a boat is powered by Migler's vertical axis windmill using electrical energy to operate an electric motor. In the eighth, a boat is powered by Migler's vertical axis windmill using a storage battery to operate an electric motor when there is no wind. In the ninth a boat is powered by Migler's vertical axis windmill, having pontoons to provide stability during strong crosswinds.06-25-2009
20090160187CONTROL SYSTEM AND METHOD FOR OPERATING A WIND FARM IN A BALANCED STATE - A method for operating a wind farm which includes a wind farm control system and at least two wind turbines, which are connected via an internal grid, is provided. The method includes determining the actual power consumption of the wind farm; and adjusting the power production of at least one of the wind turbines so that the actual power production and actual power consumption of the wind farm are substantially equal. Further, a method for operating a wind farm which includes a wind farm control system and several power sources, are connected via an internal grid, is provided. At least two of the power sources are wind turbines and at least one power source is an additional power source selected from a group consisting of a fuel power source, a battery-based power source and a solar power source. The method includes determining the actual power consumption of the wind farm; and adjusting the power production of at least one of the power sources so that the actual power production and actual power consumption of the wind farm are substantially equal. Furthermore, a wind farm control system arranged for balancing the power production and consumption of a wind farm is provided.06-25-2009
20090243296WIND ENERGY INSTALLATION WITH AN AUTONOMOUS ENERGY SUPPLY FOR A BLADE ADJUSTMENT DEVICE - Wind energy installation with a generator (10-01-2009
20130043679Wind Power Generator - A wind power generator comprises a first power generator including a rotor arranged so as to be coaxial with a rotation shaft and generates electric power by the rotation of the rotor, a flywheel which is coaxial with the rotation shaft and arranged through a one-way clutch so that when the rotation shaft increases its speed, the flywheel is in an integrally rotating state with the rotation shaft, and when the rotation shaft reduces its speed, the flywheel is separated from the rotation shaft to rotate inertially, a second power generator including a rotor arranged so as to be coaxial with the flywheel and rotate integrally with the flywheel generates the electric power by the rotation of the rotor with the rotation of the flywheel, and an output portion which externally outputs any one of the electric powers generated by the first and second power generators.02-21-2013
20130038061COLLECTOR ANTI-WEARING AND LUBRICATION SYSTEM FOR VARIABLE SPEED WIND TURBINE - A variable speed wind turbine having a doubly fed induction generator (DFIG), includes an exciter machine mechanically coupled to the DFIG and a power converter placed between a rotor of the DFIG and the exciter machine. Thus, the power converter is not directly connected to the grid avoiding the introduction of undesired harmonic distortion and achieving a better power quality fed into the utility grid. Moreover, the variable speed wind turbine includes a power control and a pitch regulation.02-14-2013
20130038060METHOD FOR CONTROLLING A WIND POWER PARK AND A WIND POWER PARK CONTROLLED BY SUCH METHOD - A method for controlling a wind power park including the steps of: collecting information relating to meteorological conditions at the location of the wind power park, estimating for each of a plurality of the wind turbines the production costs per unit energy at different load levels of the respective wind turbine, collecting information from a utility grid operator relating to energy prices and possible requirements relating to the amount of power delivered from the wind power park to the utility grid, controlling the wind power park by deciding on a total amount of power to be delivered from the wind power park and distributing the decided power production between individual wind turbines, and repeating the above steps in order to obtain a dynamic control of the wind power park. Further, a wind power park being controlled by such method is disclosed.02-14-2013
20130038059ARRANGEMENT FOR GENERATING A CONTROL SIGNAL FOR CONTROLLING AN ACCELERATION OF A GENERATOR - An arrangement is provided for controlling a power output of a power generation system by controlling an acceleration of a generator of a power generation system. The arrangement includes an input terminal for receiving an input signal indicative of an actual grid frequency of a utility grid, a control circuit for generating a control signal, and an output terminal to which the control signal is supplied. The control circuit is adapted for receiving the input signal, for determining whether the actual grid frequency is above a predefined threshold, and, if the input signal indicates that the actual grid frequency is above the predefined threshold, for generating the control signal based on the input signal. The control signal is indicative of an acceleration of the generator. The power output of the power generation system is controlled by controlling the acceleration of the generator. Further a power generation system is described.02-14-2013
20100109328CONVERTER CONTROL OF VARIABLE-SPEED WIND TURBINES - Embodiments according to the present invention provide methods and a system for a control approach that effectively maintains the DC link voltage at a constant set value under variable system conditions and keeps the converter operating within an optimal power factor range.05-06-2010
20100109327 Yawing System for a Wind Turbine - A yawing system for a wind turbine comprising a tower construction and a nacelle. The yawing system comprises a stationary part being connectable to or forming part of a tower construction of a wind turbine, and a rotating part being connectable to a nacelle of a wind turbine. The rotating part is arranged adjacent to the stationary part in such a manner that the rotating part is allowed to rotate relatively to the stationary part via a gear connection between the stationary part and the rotating part. The rotating part comprises a plurality of modules, each comprising a sub-module, the sub-modules being at least substantially identical in size and shape. Each module is configurable to perform various functions, e.g. by positioning one or more function defining elements in the corresponding sub-module. Thereby a configured module belongs to a category of modules reflecting the function of the configured module. At least one of the modules is configured as a drive module adapted to drive a rotational movement of the rotational part relatively to the stationary part, via the gear connection. Due to the similarity in size and shape of the sub-modules, a module belonging to a category may be replaced or reconfigured to belong to a different category of modules without altering the main design of the rotating part. Thereby a highly customizable yawing system is obtained, which can be produced in a cost effective manner.05-06-2010
20100109326FAN UNIT FOR WIND POWER GENERATOR AND WIND POWER GENERATOR - To provide a fan unit for a wind power generator and a wind power generator, which are capable of preventing a loss of a flow at a flow port from increasing and capable of preventing a pressure loss of a heat exchanger from increasing. A fan unit for a wind power generator (05-06-2010
20130134709Wind Turbine With Variable Speed Auxiliary Generator and Load Sharing Algorithm - An assembly for retrofitting fixed speed, doubly fed and fully converted wind turbines. A differential having an output shaft coupled to the main generator and a control shaft to change a ratio between differential input and output and coupled to the auxiliary generator. The main generator operates at constant frequency and is coupled to an electric power grid without a power converter. A variable speed auxiliary generator may be coupled to the electric grid through auxiliary power electronics. A controller may during low loads assign a full load to the auxiliary generator, during typical loads assign a variable shared load between the auxiliary and main generators based on an optimization algorithm and during high loads assign a fixed shared load between the auxiliary and main generators based on the internal gear ratio of the differential. For step-down differentials, at high loads the full load may go to the main generator.05-30-2013
20100320763METHOD FOR DETERMINING A ROTOR POSITION OF AN ELECTRICAL GENERATOR IN A WIND TURBINE - A method for determining a rotor position of an electrical generator in a wind turbine is described comprising determining a voltage of the electrical generator, determining a rotor position angle estimate based on the voltage of the electrical generator, determining a subsequent rotor position angle estimate through a feedback loop, based on a combination of the voltage of the electrical generator and the rotor position angle estimate. Further, a method to real time track encoder health is described comprising determining the phase angle of a reference voltage, determining the angle difference between the rotor position and the reference voltage, and determining the differentiation of the angle difference.12-23-2010
20100025995CURRENT SOURCE CONVERTER-BASED WIND ENERGY SYSTEM - Power conversion apparatus and methods are presented for providing electrical power to a grid or other load in which a synchronous machine is driven by a wind turbine or other prime mover to provide generator power to a switching type current source converter (CSC), with a current source rectifier (CSR) of the CSC being switched to provide d-axis control of the synchronous machine current based on grid power factor feedback, and with a current source inverter (CSI) of the CSC being switched to provide leading firing angle control and selective employment of dumping resists to dissipate excess generator energy in a fault mode when a grid voltage drops below a predetermined level.02-04-2010
20090218820Power Converter Arrangement and Method - A power converter arrangement for connecting an induction generator to an electric power network comprises a first path provided for transferring electric power from the induction generator to the electric power network during a first operation condition, and a second path provided for transferring electric power from the induction generator to the electric power network during a second operation condition, where the first path includes an AC-AC converter and the second path includes a switch. A capacitor arrangement is interconnected between the induction generator and the first and second paths and a first AC reactor device is interconnected between the capacitor arrangement and the first and second paths, where the capacitor arrangement is provided for compensating for a magnetization current of the induction generator.09-03-2009
20100066088WIND TURBINE GENERATOR - A wind turbine generator is provided in which the efficiency of heating the interior of a nacelle can be improved at a low outside air temperature in a cold region. The wind turbine generator includes a nacelle that accommodates a driving and generating mechanism connected to a rotor head fitted with turbine blades, wherein the nacelle is equipped with a lubricant-oil cooling fan and a generator cooling fan that ventilate the interior of the nacelle to prevent an increase in the temperature of the interior and a heating device that raises the temperature of the interior of the nacelle at a low outside air temperature, wherein the cooling fans can be operated with the rotating directions and the rotational speeds thereof being controlled, and during the operation of the heating device, the rotating directions and the rotational speeds of the cooling fans are controlled so as to make the wind velocity at the ventilation ports thereof about zero.03-18-2010
20090045628THERMAL MANAGEMENT SYSTEM FOR WIND TURBINE - A wind turbine includes a wind turbine tower and a power electronic control system located within the wind turbine tower. The power electronic control system includes heat generating components. The heat generating components are directly mounted to the inner surface of the wind turbine tower dissipating the heat generated by the heat generating components directly to the inner surface of the wind turbine tower. In this way, a good thermal conducting path to the entire wind turbine tower is provided. A method for conducting heat generated in electronic equipment housed within a wind turbine tower uses the tower as a heat sink for cooling purposes.02-19-2009
20090045627WIND TURBINE ASSEMBLIES AND SLIP RING ASSEMBLIES FOR WIND BLADE PITCH CONTROL MOTORS - Slip ring assemblies for controlling pitch of a wind driven blade such as those utilized in wind turbines can include a series of grooves disposed about an outer perimeter of a rotating portion, each one of the grooves comprising a first planar surface intersecting with a second planar surface at an angle of 75 to 105 degrees, and a concavely rounded bottom portion at the intersection of the first and planar surfaces. The rotating portion of the slip ring can be formed of a bronze material and may include a graphite coating. Also disclosed herein are wind turbine assemblies employing the slip ring assemblies.02-19-2009
20120181789Method And Systems For Detecting Electrical Discharges In A Machine - A monitoring system for use in detecting an electrical discharge within at least one component of a machine includes at least one sensor coupled to the machine for measuring an operating condition of the at least one component. The monitoring system includes a signal analysis module configured to receive a signal representative of the measured operating condition and to calculate an asymmetry value based on the signal received. The monitoring system includes a detection module coupled to the signal analysis module for detecting an electrical discharge within the at least one component based on the asymmetry value.07-19-2012
20090008939MODULAR WIND TURBINE, MULTI-TURBINE WIND TURBINE, WIND TURBINE COMPUTER SYSTEM, AND METHOD OF USE THEREOF - A modular multi-turbine unit of fixed toroidal support structures having a rail system designed to allow each of the plurality of turbines to rotate to a most efficient position relative to the wind for generating power, a computer control system capable of positioning each of the plurality of turbines to most effectively generate power from the wind, preventing damage to the turbines, and providing a wind predictive model based on the wind characteristics for the area in which the wind turbine is located.01-08-2009
20130049363PERMANENT MAGNET MACHINE CONTROL SYSTEM - A permanent magnet (PM) machine system is provided having a PM machine and a controller in communication with the PM machine. The PM machine has a q-axis voltage feedback signal and a pullout torque that represents a peak torque that the PM machine generates. The controller includes a q-axis current regulator that produces a commanded q-axis voltage that is supplied to the PM machine. The controller also includes at least one control logic for monitoring the q-axis voltage feedback signal of the PM machine.02-28-2013
20100133831METHOD AND APPARATUS FOR CONTROLLING A WIND TURBINE - A control system for a wind turbine, the control system having at least one measurement device configured to measure at least one operating condition of the wind turbine and a first controller. The first controller is configured to calculate an operating limit of the wind turbine based on the measured operating condition and to adjust the operating limit based on a limiting condition of a component of the wind turbine.06-03-2010
20100133816Power Converter For Use With Wind Generator - In one embodiment, the present invention includes a turbine to generate mechanical energy from kinetic energy, a generator coupled to the turbine to receive the mechanical energy and to output multiple isolated supply powers, and multiple power stages each coupled to the generator. Each of the power stages may receive at least one of the isolated supply powers.06-03-2010
20100133826METHOD AND APPARATUS FOR GENERATING POWER IN A WIND TURBINE - A generator for use in a wind turbine includes a rotor including a plurality of windings. The rotor is configured to be electrically coupled to a wind turbine electrical distribution system. The generator also includes a stator including a plurality of windings. The stator is configured to be magnetically coupled to the rotor and electrically coupled to the wind turbine electrical distribution system. The stator is further configured to switch between a first number of magnetic poles and a second number of magnetic poles.06-03-2010
20100133821METHOD AND SYSTEM FOR EXTRACTING INERTIAL ENERGY FROM A WIND TURBINE - A system for operating a wind turbine during a curtailment operation is described. The wind turbine includes a generator and a wind turbine rotor having at least one rotor blade. The wind turbine also includes a drive train that includes at least one shaft coupled to the wind turbine rotor and configured to drive the generator. The system includes a control system configured to increase a speed of rotation of the rotor beyond an optimum rated speed during the curtailment operation of the wind turbine, and an extraction device configured to extract inertial energy stored in the drive train upon release of the curtailment operation.06-03-2010
20100133830SYSTEMS AND METHODS FOR ASSEMBLING A PITCH ASSEMBLY FOR USE IN A WIND TURBINE - A method of assembling a pitch assembly for use with a wind turbine. The wind turbine includes a rotor and a plurality of rotor blades coupled to the rotor. The method includes coupling a pitch drive system to at least one of the plurality of rotor blades for rotating the rotor blade about a pitch axis. At least one sensor is coupled in signal communication with the pitch drive system. The pitch drive system rotates the rotor blade when the sensor senses rotor overspeed.06-03-2010
20100133825AZIMUTH ANGLE MEASUREMENT SYSTEM AND METHOD FOR OPERATING THE SAME - An azimuth angle measurement system includes a rotatable ring, a wire coupled at a first end to the ring, a length measurement device configured to measure a length of a portion of the wire that extends from the ring, and a control system configured to determine an azimuth angle based on the length of the portion of the wire extending from the ring.06-03-2010
20100133827METHOD AND SYSTEM FOR CONTROLLING A WIND TURBINE - A control system for a wind turbine having a tower, a generator, and at least one rotor blade. The control system includes a sensor configured to measure an angle of inclination of the tower with respect to a surface, at least one pitch assembly configured to adjust a pitch angle of the rotor blade, and a controller configured to control at least one of the pitch assembly and the generator based on the measured angle of inclination.06-03-2010
20100133824METHOD AND SYSTEM FOR COOLING A WIND TURBINE STRUCTURE - A control method and associated component configuration provide cooling for components within a wind turbine structure, such as a tower or nacelle. A recirculating airstream of internal air is established in the structure. For a defined set of operational conditions of the wind turbine that affect a required cooling capacity within the structure, the recirculating airstream is controllably augmented with external air to increase cooling capacity of the recirculating airstream. The amount of external air introduced into the structure is balanced with the amount of relatively hotter internal air within the structure so as to achieve a desired balance of temperature and relative humidity within the structure.06-03-2010
20100270800WIND ENERGY SYSTEMS AND METHODS OF USE - Improved systems and methods to generate power using wind and controlled air movement and related structures to more cost effectively produce energy and protect system components.10-28-2010
20090302608WIND POWER INSTALLATION AND METHOD OF MODIFYING THE BLADE PITCH IN A WIND POWER INSTALLATION - The wind power installation comprises a rotor with at least one rotor blade, a generator, and a pitch control system for controlling the pitch of the rotor blades, said pitch control system comprising at least one AC motor (12-10-2009
20090302609POWER TRAIN FOR A WIND POWER PLANT - A power train for a wind power plant includes a rotor (12-10-2009
20120217748WIND TURBINE STAND STILL LOAD REDUCTION - The invention relates to a method of controlling a wind turbine comprising a tower, a nacelle located on the tower, and a rotor mounted on the nacelle and comprising a hub and at least one blade, the wind turbine further comprising a yaw drive system for rotating the nacelle in relation to the tower about a substantially vertical axis, and/or a pitch drive system for rotating the blade around a longitudinal axis there of the method comprising, during a stand-still, non-power-producing situation of the wind turbine due to high wind speeds, continuously or periodically rotating, by means of the yaw drive system, the nacelle so as to vary the direction of the wind in relation to the rotor, and/or continuously or periodically rotating, by means of the pitch drive system, the blade so as to vary the direction of the wind in relation to the blade.08-30-2012
20120217749CONTROL SYSTEM FOR WIND FARMS WITH AEROGENERATIONS PROVIDED WITH MODULAR CONVERTERS - A control system (08-30-2012
20120217747METHOD OF CONTROLLING A WIND TURBINE GENERATOR AND APPARATUS FOR CONTROLLING ELECTRIC POWER GENERATED BY A WIND TURBINE GENERATOR - A method of controlling a wind turbine generator is provided, the wind turbine generator converting mechanical energy to electrical. The method comprises: determining an electromagnetic power reference representing the electromagnetic power generated by the wind turbine generator, wherein the electromagnetic power reference is determined based on a desired output of the wind turbine generator; controlling the electrical power generated by the wind turbine generator using a control signal, wherein the control signal is derived from the electromagnetic power reference and is modified in dependence on an inverse power function of the wind turbine generator by incorporating minimal copper loss constraint and stator voltage limiting constraint such that non-linearity of the wind turbine generator plant is compensated in the control loop and it operates at its maximum efficiency. One effect of the method is that classical linear control loop design can be employed in spite of the plant being a non-linear identity.08-30-2012
20120217746WIND TURBINE - A wind turbine is provided. The wind turbine includes at least one generator adapted to generate electric power and a plurality of electrical converter units adapted to convert electric power generated by the generator and electrically connectable or connected to the generator and to a utility grid. The generator includes a stator being segmented in stator segments. Each stator segment includes a plurality of stator windings. The stator windings of the respective stator segments are divided into at least a first and a second group of stator windings with each group including at least one stator winding. Several or all first groups of stator windings are electrically connected to a first electrical converter unit and several or all second groups of stator windings are electrically connected to a second electrical converter unit.08-30-2012
20090102198Method for controlling wind turbines, and devices therefore - Method for controlling the rotational speeds of wind turbines, including determining the rotor rotational speed of a first and a second wind turbine; determining the rotor azimuth angle of the first and the second wind turbine; calculating a speed control value for the first wind turbine, based on the determined rotor azimuth angles and rotor rotational speeds; adjusting the rotor rotational speed of the first wind turbine according to its speed control value, wherein the speed control value is calculated such that the rotor azimuth angle of the first wind turbine is equal to the rotor azimuth angle of the second wind turbine after speed adjustment, and a wind turbine control master unit, a wind turbine control slave unit, a wind turbine control device, a signal light control module, and a wind turbine therefor.04-23-2009
20130056985WIND-POWER GENERATION SYSTEM WITH OVER-SPEED PROTECTION AND METHOD OF OPERATING THE SAME - A wind-power generation system with an over-speed protection is disclosed. The system is provided to convert wind energy into mechanical energy by a wind turbine, and mechanical energy is converted into electric energy by the wind turbine driving a generator. Also, electric energy is delivered to a power grid. The wind-power generation system mainly includes an AC crowbar, a fuse, and a DC chopper. The AC crowbar or the DC chopper is provided to consume superfluous energy outputted from the generator, thus providing an over-load operation to brake the wind turbine when the wind turbine operates under a first stage over-speed operation. Finally, the generator is isolated from the generator-side converter by disconnecting the fuse when the wind turbine operates under a second stage over-speed operation.03-07-2013
20100084865STATOR CONTROLLED INDUCTION GENERATORS WITH SHORT-CIRCUITED ROTOR - A generator is connectable to a turbine for generating electric power or a motor. An electric power generator system or a motor comprises an asynchronous short-circuited rotor generator or motor comprising a stator, a rotor, and a transformer having a first winding and a second winding, the first winding having a first end and a second end. The stator and the transformer are connectable in series with an electric power distribution grid.04-08-2010
20110012353WIND POWER GENERATOR - A wind power generator is provided which is configured to take a measure against a decrease in oil temperature which measure requires no new large-capacity power source. A wind power generator including a hydraulic pump configured to be stopped when a wind turbine is shut down further includes a bypass channel branching off from an discharge side channel of the hydraulic pump and connected to an oil tank, an electromagnetic valve provided in the bypass channel and opened when the hydraulic pump is started, a temperature sensor configured to detect the oil temperature of hydraulic operating oil, and a controller configured to carry out pump inching after the hydraulic pump has been started, to raise the temperature of the hydraulic operating oil to a predetermined value.01-20-2011
20110012352Bang-Bang Controller and Control Method For Variable Speed Wind Turbines During Abnormal Frequency Conditions - A wind farm (01-20-2011
20130062880METHOD AND APPARATUS FOR PROTECTING WIND TURBINES FROM FATIGUE DAMAGE - A wind turbine has a Lidar device to sense wind conditions upstream of the wind turbine including wind speed, direction and turbulence. Signals from the Lidar are processed to detect an event which could give rise to low cycle fatigue loading on one or more components of the wind turbine. On detection the system controller takes the necessary evasive action depending on the nature and severity of the extreme condition detected. This may include a significant reduction in power generated through reduction in rotor speed or torque, complete shutdown of the generator and yawing of the nacelle and rotor in response to a change in wind direction.03-14-2013
20090236853MICRO-ELECTROMECHANICAL CURRENT SENSING APPARATUS - A micro-electromechanical (MEMS) current sensing apparatus includes a carrier portion, an optical portion disposed on the carrier portion, the optical portion including an optical path and a magneto-sensitive element within the optical path, a light source disposed on the carrier portion in operative communication with a first end of the optical path, and a photo-detector disposed on the carrier portion in operative communication with a second end of the optical path.09-24-2009
20090008937DC Voltage Regulator - The disclosure details implementations of apparatuses, methods, and systems for regulating DC bus voltages. In an implementation, the system is configured to regulate the DC bus voltage directly by operating at the DC bus rather than indirectly on the AC side of the DC bus. In one implementation, the DC voltage regulator is configured with components including a DC voltage regulator power control board, a switching device, a resistor, and a flyback diode. In one non-limiting implementation example, the DC voltage regulator may be used to control the DC bus voltage of a doubly fed induction generator of a wind turbine. In this implementation, the DC voltage regulator effectively protects the converter of the induction generator and also reduces the transient torques on the generator shaft during voltage irregularities. This, in turn, reduces excessive wear on the wind turbine gearbox by limiting fatigue loads on the gear teeth that may result from transient torques.01-08-2009
20130134712DIRECT DRIVE WIND TURBINE AND METHOD FOR CONTROLLING AN AIR GAP - A direct drive wind turbine comprising a rotor and a generator, the rotor comprising a hub and a plurality of blades and being rotatably mounted on a frame, and the generator comprising a generator rotor and a generator stator, further comprising one or more dampers arranged between the rotor and the generator rotor and extending at least partially in an axial direction.05-30-2013
20080303281ROTATIONAL SPEED DETERMINATION - The invention relates to a method for the operation of a wind power plant (12-11-2008
20120235409ACCURATE ESTIMATION OF THE CAPACITY AND STATE OF CHARGE OF AN ENERGY STORAGE SYSTEM USED IN WIND FARMS - Embodiments of the invention provide techniques and apparatus for accurately estimating an aged capacity (E09-20-2012
20130161949METHOD, PARK CONTROLLER AND PROGRAM ELEMENT FOR CONTROLLING A WIND FARM - The disclosure relates to a method for controlling a wind farm, the wind farm includes at least two wind turbines, the method includes determining the required power, determining fatigue load versus power curves for each wind turbine, and based on the determined fatigue load versus power curves attributing different power settings to the wind turbines such that sum of the power settings of all wind turbines is equal to the required power. Furthermore, the invention concerns a park controller for controlling a wind farm and a program element for controlling a wind farm.06-27-2013
20130161950WIND POWER GENERATING SYSTEM AND METHOD FOR CONTROLLING THE SAME - A control method for a wind power generating system includes the following procedures. When a rotational speed control condition is satisfied, a wind turbine is switched to operate under a rotational speed control mode to limit the electricity power by a maximum power point shifting manner. When a speed of an external wind is greater than a predetermined wind speed, the wind turbine is switched to operate under a safety mode to decrease a rotational speed of the wind turbine by a maximum torque extraction manner to protect the wind power generating system. A wind power generating system is also disclosed herein.06-27-2013
20130161951METHOD FOR DETERMINING A VOLTAGE BOUNDING RANGE - A method is provided for determining a voltage bounding range defining a range of a wind turbine reference voltage for a wind turbine for controlling an output voltage of the wind turbine at a wind turbine output terminal The method includes obtaining information regarding an electrical characteristic of a transmission line connecting the wind turbine output terminal to a point of common coupling to which plural other wind turbines are connectable. The method further includes defining the voltage bounding range based on the electrical characteristic of the transmission line.06-27-2013
20130161952Method for controlling a wind turbine - A method for controlling a wind turbine with a rotor and at least one rotor blade, and a control unit are disclosed. The method is characterised in adjusting a pitch angle of the rotor blade and determining the limit of an input value based on the adjusted pitch angle, wherein the input value includes information about the turbine rotational speed.06-27-2013
20130161956Estimation of Wind Conditions at a Wind Turbine - The risk of an extreme gust of wind hitting a wind turbine is estimated by gathering data from one or more sensors for use as training data. This data is acquired over a period of time and is converted in to a feature vector for a given time period by a statistical measure. A number of feature zones are formed, each zone relating to a different estimate of risk with each feature vector being assigned to a risk category. The risk category is defined with reference to the value of one or more chosen turbine parameters at the time the data was acquired. The feature zones are formed from from a measure of distance such as the mean and co-variance of feature vectors from within a given category. Live data is processed by measuring the mahalonobis distance from the feature vector of the live data to the centre of each zone and the risk of an extreme gust is assessed as that of the feature zone to which the mahalonobis distance is lowest.06-27-2013
20120267892WIND POWER GENERATING SYSTEM - According to the present invention, there is provided a wind power generating system, having a plurality of plasma airflow generating units, each including a first electrode and a second electrode arranged being separated from the first electrode with a dielectric film and generating plasma airflow owing to dielectric barrier discharge when voltage is applied between the first electrode and the second electrode; and at least one plasma power source which supplies voltage to the plasma airflow generating units, wherein the plasma airflow generating units are arranged at a blade of the wind power generating system and are supplied with voltage as being separated into a plurality of lines separately for each of the lines.10-25-2012
20130161955CONTROL METHOD FOR A WIND TURBINE - The invention relates to a method of controlling a wind turbine having a rotor with pitchable wind turbine blades and a generator for producing power, where a pitch reference value for the wind turbine blades is determined, and an operational parameter representing a loading on the wind turbine rotor exerted by the wind is measured at time intervals. A variation parameter reflecting a variation of the operational parameter over time is determined and used in the determination of a minimum pitch limit value of the pitch reference value. The wind turbine is then controlled according to the pitch reference value only if the pitch reference value is above or equal to the minimum pitch limit value, and otherwise according to the minimum pitch limit value.06-27-2013
20110025060POWER GENERATOR - A power generator using a floating object and exhibiting further improved power generation efficiency includes a floating object including a floating body arranged to catch wind, a plurality of posture control strings, and a posture control instrument, at least one first control string connected to the posture control instrument, a first control string take-in device arranged to take the at least one first control string into a first base body, a forward/backward movement control device arranged to control forward/backward movements of the posture control strings, a first winding device arranged to wind a proximal send of the at least one first control string, a second control string connected to the posture control instrument, a second control string take-in device arranged to take the second control string into a second base body installed apart from the first base body, and a second winding device around which a proximal end of the second control string is wound. The at least one first control string or the posture control instrument that mounts a communication device is arranged to control a front/rear inclination angle θ of the floating object, and the second control string is reeled out/taken up in accordance with the front/rear inclination to generate electric power.02-03-2011
20090218818WIND TURBINE PLANT HIGH WIND DERATING CONTROL - A method for operating a wind turbine plant including providing a plurality of wind turbines each having a turbine rotor including at least one blade mounted to a rotatable turbine shaft and an induction generator having a stator and a rotor coupled to the turbine shaft for rotation therewith. The wind turbine is configurable to provide a variable amount of power. A control is provided capable of communicating with the plurality of wind turbines. A wind speed is measured and a power derating factor is determined in response to the measured wind speed. The determined derating factor is communicated to the plurality of wind turbines. The amount of power generated by each of the plurality of wind turbines is adjusted in response to the power derating factor. A system for operating a wind turbine plant is also disclosed.09-03-2009
20090218817WINDFARM COLLECTOR SYSTEM LOSS OPTIMIZATION - A windfarm system is provided that is optimized for minimizing electrical loss. The windfarm system includes a plurality of wind turbine generators and a collector system including a conductor or network of conductors. The collector system also including a plurality of transformers with one or more transformers connected between each wind turbine generator and the conductors, and a substation transformer connecting the windfarm collector system to the electrical grid. The windfarm system also includes a monitoring system for monitoring the windfarm system electrical output and thermal condition, and outputs of the individual wind turbine generators. A control function may include voltage and real and reactive power commands to the individual wind turbine generators. The control function incorporates an algorithm whose technical effect is minimizing electrical losses for the windfarm system.09-03-2009
20100270798LIFETIME OPTIMIZATION OF A WIND TURBINE GENERATOR BY CONTROLLING THE GENERATOR TEMPERATURE - A wind turbine and a method for controlling the temperature of a wind turbine generator are disclosed, the wind turbine comprising a generator, generator temperature control means and means for providing input representative of at least one temperature of the generator to the generator temperature control means, the generator temperature control means including a closed-loop regulation arranged to determine a deviation of the input from at least one desired value, compute the magnitude of at least one control output in dependency of the determined deviation, and feed the control output to at least one controller of the wind turbine in order to reduce the deviation, the controller comprising control means for controlling the operation of the wind turbine in response to the at least one control output by changing one or more operational parameters of the wind turbine, which parameters influence the at least one temperature of the generator.10-28-2010
20090278353ATMOSPHERIC RESOURCES EXPLORER - The invention herein described consists of a system destined to harness wind resources, transferring wind power to the ground station group on the surface, the process being performed through the tensioning and unwinding of the cable group connecting the airborne group to a reeler in the said ground station group. Through the control group the resultant force vector of the aerodynamic forces tensioning the cable can be significantly altered. This change in aerodynamic forces can be done in order to create two different phases which define the cyclic movement performed by the system: a work phase, where the resultant force vector is of greater magnitude and tensions the cable, unwinding it at the ground station group and thus producing power; and a recovery phase (which requires power from the system) when the cable is rewound in order to bring the airborne group back to its original position. Because the work produced in the work phase is of greater magnitude than the work required during the recovery phase, the system generates positive net power, which can then be introduced in the electrical grid, or stored as any other form of energy such as chemical or mechanical.11-12-2009
20120286509METHOD FOR OPERATING A WIND TURBINE AND WIND TURBINE SUITED THEREFOR - In a wind turbine, when a deviation of a grid voltage from a certain regular grid voltage range occurs, current residual grid voltage is measured, current wind speed is measured, a certain time period starting with the detecting of the change in grid voltage is defined depending on the value of the residual grid voltage, and the wind turbine is operated within the defined time period depending on the value of the residual grid voltage in a certain operating mode that deviates from regular operation with respect to the effective power, and the wind turbine is operated again in the regular operating mode after the grid voltage has normalized again within the defined time period, or is shut off at the end of the time period if the deviation of the grid voltage persists.11-15-2012
20120286510WIND POWER GENERATION SYSTEM AND METHOD OF CONTROLLING THE SAME - Provided is a wind power generation system intending to suppress an increase of torque when a voltage in a utility grid is restored, and to reduce a load to devices due to the torque. The blade control unit controls the pitch angle of the wind turbine blades such that a rotation speed of the power generator becomes equal to or greater than a synchronous rotation speed when the power control unit de-actuates the operations of the converter and the inverter, and controls the pitch angle of the wind turbine blades such that the pitch angle matches a target pitch angle that is determined based on one of a wind speed, a rotation speed of the power generator, and a requested output power when the power control unit re-actuates the operations of the converter and the inverter.11-15-2012
20110140430Method and System for Providing Increased Turbine Output for Doubly Fed Induction Generator - A system and method for supplying increased frequency supporting current from a doubly fed induction generator (DFIG) to assist in maintaining grid stability is provided. The output capability of a line side converter associated with the DFIG is enhanced by significantly increasing the current handling capacity of electric switches forming the converter. A dynamic brake is also provided across a DC link bus coupling the line side converter to another converter coupled to the rotor of the DFIG. The dynamic brake is controlled based on the voltage across the DC link bus.06-16-2011
20130161954WIND POWERED ENERGY AMPLIFICATION SYSTEM AND METHOD - The present invention is comprised of a wind powered energy amplification method and systems for capturing wind power and harvesting tangentially amplified energy. The harvested tangentially amplified energy is converted, processed and stored for use for generating continuous, on demand and stand by electricity to supply electricity. The present invention is further comprised of methods and systems for extracting, processing and storing water and carbon dioxide to supply water and supply carbon dioxide.06-27-2013
20100289265WIND DAM AND VERTICAL TURBINE SYSTEM - The present invention is a wind dam and vertical turbine system set on a ground surface that captures and directs wind to generate electricity. The system has a wind dam portion with a front opening, an airfoil above the front opening and a vertical turbine portion with a housing disposed on the dam portion's back side with a turbine slide door and actuator. There are also front outriggers with front wheels that are horizontally aligned to the front opening and back outriggers with drive wheels that are horizontally and movably aligned to each end of the back side of the dam portion. There is also a power drive assembly for the vertical turbine and exhaust doors and actuators to expel excessive wind.11-18-2010
20110140421METHOD FOR OPERATING A WIND TURBINE, COIL ARRANGEMENT FOR AN ELECTRIC MACHINE, AND CONTROLLER FOR A WIND TURBINE - The disclosure concerns a method for operating a wind turbine having a generator, the generator having for each phase a plurality of coils, wherein the plurality of coils of each phase includes at least one group of coils including at least two coils, the group of coils including at least two subgroups including at least one coil, wherein the generator has a first state in which the coils of the group of coils are electrically connected in series, and, the generator has a second state in which the at least two subgroups are switched electrically in parallel; the method including: changing the state of the generator. Further, the disclosure concerns a coil arrangement for an electric machine for a wind turbine, the electrical machine having for each phase a plurality of coils, wherein the plurality of coils of each phase includes at least one group of coils including at least two coils, the group of coils including at least two subgroups including at least one coil, wherein the electrical machine has a first state in which the coils of the group of coils are electrically connected in series, and, the electrical machine has a second state in which the at least two subgroups are switched electrically in parallel.06-16-2011
20110140419WIND POWER ELECTRICITY GENERATING SYSTEM AND RELATIVE CONTROL METHOD - A wind power electricity generating system having a nacelle; a rotary assembly rotating about an axis with respect to the nacelle; and an angular speed detection device having at least one image sensor facing a surface of the rotary assembly.06-16-2011
20110074155FLOATING OFFSHORE WIND FARM, A FLOATING OFFSHORE WIND TURBINE AND A METHOD FOR POSITIONING A FLOATING OFFSHORE WIND TURBINE - A floating offshore wind turbine and a floating offshore wind farm with at least one floating offshore wind turbine are provided. The floating offshore wind turbine includes a floating platform anchored to an underwater ground, a wind turbine mounted on the floating platform, and a drive. The drive is adapted to horizontally move the floating platform. Further a method for positioning a floating offshore wind turbine is provided.03-31-2011
20110133456WIND TURBINE BRAKE POWER GENERATION - A wind turbine, includes a tower for supporting a nacelle; a gearbox connected to an electrical generator arranged in the nacelle; a plurality of blades for rotating the gearbox and driving the generator; a brake disk for stopping rotation of at least one of the gearbox and the generator; and an auxiliary power source, driven by the brake disk, for generating power.06-09-2011
20100038908WIND TURBINE GENERATOR SYSTEM - A wind turbine generator system can regulate the rotational velocity of the wind turbine within an operation range even when the wind velocity suddenly changes and can perform continuous operation of the wind turbine. The wind turbine generator system includes a generator connected to the shaft of the wind turbine and a converter connected to the generator. When the rotational velocity of the wind turbine is within a predetermined range, power outputted from the generator is controlled so as to follow the instruction concerning the generator output given from the wind turbine to the converter. When the rotational velocity of the wind turbine is out of the predetermined range, the power outputted from the generator is controlled without following the instruction concerning generator output given from the wind turbine to the converter.02-18-2010
20100314872METHODS AND SYSTEMS FOR OPERATING A WIND TURBINE POWER CONVERTER - A method for providing an output power to a load is described. The method includes coupling a multi-thread power converter system to an alternating current (AC) generator and to a load and monitoring at least one operating characteristic of the AC generator. The method also includes providing the multi-thread power converter system with one of a first switching pattern and a second switching pattern based at least partially on the at least one monitored operating characteristic. The method also includes configuring the multi-thread power converter system to operate in accordance with the first switching pattern and the second switching pattern and to convert an AC input power provided by the generator to an output power for delivery to the load.12-16-2010
20120187684DEVICE, SYSTEM AND METHOD TO LOWER STARTING TORQUE FOR ELECTRICAL SYSTEM - The present disclosure describes lowering of the starting torque for an alternator or motor. The disclosure also describes the integrated torque management system, torque control logic and torque control method. The current process may be adopted for any motor or alternator that has to manage the starting torque for optimal performance. The disclosure also provides a method, system and a device to allow any energy generating system to rotate at lower speeds to improve the efficiency of power generators.07-26-2012
20120187682ELECTRO-HYDRODYNAMIC WIND ENERGY SYSTEM - A system for electro-hydrodynamically extracting energy from wind includes an upstream collector that is biased at an electric potential and induces an electric field. An injector introduces a particle into the electric field. The wind drag on the particle is at least partially opposed by a force of the electric field on the particle. A sensor monitors an ambient atmospheric condition, and a controller changes a parameter of the injector in response to a change in the atmospheric condition.07-26-2012
20120187683Method for the oscillation damping of a drive train in a wind turbine, wind turbine and use of a braking device - A method for the oscillation damping of a drive train in a wind turbine is proposed. The drive train connects a rotor to a generator. Parameter values representing an oscillation of the drive train are calculated and, on the basis of the calculated parameter values, damping forces which counteract the oscillation of the drive train are exerted in a controlled manner on the drive train by a braking device.07-26-2012
20100007144VERTICAL AXIS WIND SYSTEM - A vertical axis wind system for use in electrical power generation. The system includes a stationary base including a generator and has an elongate shaft rotatably coupled the base. The elongate shaft extends vertically from a lower end to an upper end along a vertical central axis and engages the generator. At least two arcuate blade assemblies are attached between the lower end and the upper end of the elongate shaft such that aerodynamic forces acting on the at least two arcuate blade assemblies rotate the elongate shaft for the generation of power.01-14-2010
20090206605METHOD FOR THE OPERATION OF A WIND ENERGY PLANT - A method for the operation of a wind energy plant, with an operation management, which can preset a desired value for an electric variable of the wind energy plant to be generated; a wind measurement device, which can capture the wind direction and the wind velocity, and a control unit, on which the measured values for the wind velocity and the wind direction are present, and in which a maximum value for the turbulence intensity is filed, the following procedural steps proceed in the method: from a turbulence intensity depending on the wind direction, the control unit determines one or more sectors of critical wind directions, in which the turbulence intensity exceeds the maximum value for the turbulence intensity, the control unit generates a control signal for the operation management, in order to reduce the desired value of the electric variable to be generated when the measured wind direction is in a sector of the critical wind directions, and a determined characteristic value exceeds a predetermined maximum value for the characteristic value.08-20-2009
20090206607POWER GENERATOR AND MOTOR DEVICE - The fluid power generator is provided. The fluid power generator includes: a rotating member that rotates by fluid force; a generator motor that is mechanically linked with the rotating member and that is configured to function both as a generator and as a motor; a rotation speed meter that measures a rotation speed of the generator motor; and a controller that controls the generator motor, wherein the controller has a control mode to keep the rotation of the rotating member irrespective of a variation in flow rate of the fluid.08-20-2009
20090206603Method of maintaining wind turbine components operational and a turbine comprising components suitable for operational maintenace - The invention relates to a wind turbine (08-20-2009
20110316278Locking Device for the Rotor of Wind Turbines - The invention relates to a wind turbine comprising a tower, a nacelle that is located on the tower and is provided with a machine support, a rotor shaft bearing and a generator, and comprising a rotor with a rotor shaft, a rotor hub and at least one rotor with at least one rotor blade that is fixed to the rotor hub. According to the invention, the wind turbine has a locking device established by a locking bolt that can be driven into a locking bolt recess in order to positively lock the rotor. The invention is characterized in that the locking bolt is located on the rotor hub and the locking recess is located on the nacelle.12-29-2011
20110127772WIND TURBINE GENERATOR AND ITS CONTROL METHOD - There is provided a yaw control technique for a wind turbine generator that can decrease the magnitude of the wind direction deviation even though the wind direction changes gradually over an extended period of time while suppressing an increase in the number of yaw rotations. Further, there is provided a yaw control technique for a wind turbine generator that can improve the efficiency of a wind turbine generator by performing yaw rotation at an appropriate timing through early detection of transitional changes in the wind direction. The wind turbine generator includes a nacelle in which a wind turbine rotor is mounted, a rotating mechanism that performs yaw rotation of the nacelle, a wind direction measuring means that measures a wind direction, and a controller that controls the rotating mechanism. The controller calculates the wind direction deviation from the direction of the wind turbine rotor and the wind direction measured by the wind direction measuring means, and performs yaw rotation of the nacelle by the rotating mechanism when any one of the following conditions (1) and (2) is satisfied. The conditions (1) and (2) include (1) a state where the absolute value of the wind direction deviation is not less than a first threshold (or a state where the absolute value of the wind direction deviation exceeds a first threshold) continues for a predetermined first duration, and (2) a state where the absolute value of the wind direction deviation is not less than a second threshold larger than the first threshold (or a state where the absolute value of the wind direction deviation exceeds a second threshold) continues for a second duration shorter than the first duration. Assuming that the current time is denoted by t06-02-2011
20110285130Power System Frequency Inertia for Wind Turbines - A wind turbine system and method are provided. The wind turbine system includes a wind turbine operable to supply wind power to an utility system; a synchronous generator coupled to the utility system; a grid measurement device arranged for measuring the current and power that is exchanged between the synchronous generator and the utility system; a controller for adjusting the output power of the wind turbine as a function of the power and current that is measured by the grid measurement device; and a means of communication between the grid measurement device, controller and/or the wind turbine, wherein the wind turbine is configured to provide current and power to the utility system as a function of the measured power and current of the grid measurement device.11-24-2011
20110285129 WIND TURBINE AND A METHOD FOR MONITORING A WIND TURBINE - According to the inventive concept, there is provided a wind turbine with at least one blade. The wind turbine comprises a first accelerometer mounted at a first radial position of the blade and being adapted to determine a first acceleration value, and a second accelerometer mounted at a second radial position of the blade different from the first radial position, and the accelerometer being adapted to determine a second acceleration value. The wind turbine further comprises a controller adapted to generate a signal based on said first and second acceleration values. There is also provided a method for monitoring a blade of a wind turbine.11-24-2011
20110298213HANDY TERMINAL FOR WIND TURBINE GENERATOR, WIND TURBINE GENERATOR AND WIND POWER SITE - A handy terminal for a wind turbine generator that can prevent management of control logics of control devices for controlling operation of the wind turbine generator from becoming cumbersome. The handy terminal for the wind turbine generator comprises, a connecting portion that connects to a connecting end provided on the wind turbine generator, an operating ends group that generate operation signals to selectively enable control logics included in a control circuit that is incorporated in the wind turbine generator, and a display portion that displays the operating state of the operating ends, wherein the operation signals generated by the operating ends group are operation signals that selectively enables the operating or maintenance control logics of the control circuit of the corresponding wind turbine generator connected via the connecting portion, that are common to the other wind turbine generators in the same site.12-08-2011
20110298214Vertical Axis Fluid Turbine - A fluid turbine, comprising an inner shaft comprising a first number of concave vanes coupled thereto, the first number of concave vanes forming a number of rows of vanes, and an outer shaft, coaxial to the inner shaft, comprising a second number of concave vanes coupled thereto, the second number of concave vanes forming a number of rows of vanes in which adjacent rows of vanes alternate between the first number of vanes and the second number of vanes, in which the first number of vanes rotate axially in a first direction, in which the second number of vanes rotate axially in a second direction, and in which the concave surface of the first and second number of concave vanes define a fluid gathering surface.12-08-2011
20120139246ASYNCHRONOUS GENERATOR SYSTEM AND WIND TURBINE HAVING AN ASYNCHRONOUS GENERATOR SYSTEM - The present invention relates to an asynchronous generator system for a wind turbine, and a wind turbine with such a system, and the method for operating and starting up such a wind turbine. Herein, the asynchronous generator system is developed especially simply and thus cost-effectively and is able to go through wind storms and the increase of rotational speed associated therewith.06-07-2012
20120032443ENERGY GENERATING INSTALLATION, ESPECIALLY WIND POWER INSTALLATION - An energy generating installation, especially a wind power station, includes a drive shaft connected to a rotor (02-09-2012
20110291416USE OF PITCH BATTERY POWER TO START WIND TURBINE DURING GRID LOSS/BLACK START CAPABILITY - A method of operating a wind power plant during grid loss is disclosed. The method includes powering a blade pitch drive of the wind power plant by an energy storing unit, and adjusting the pitch of the rotor blades of the wind power plant by means of the blade pitch drive, wherein a rotor shaft keeps rotating and the wind power plant enters a self-sustaining power generating mode upon adjustment of the pitch of the blades.12-01-2011
20110291413MODULAR ELECTRIC GENERATOR FOR VARIABLE SPEED TURBINES - An electric power generation system may be constructed of multiple similar generator modules arranged between a rotor and a stator. The rotor may be coupled to and/or integrated with a turbine that is configured to rotate in the presence of a fluid stream such as wind or water. Each generator module may have a rotor portion configured to generate a magnetic field having at least one characteristic that changes with respect to the rotational speed of the rotor. Each generator module may further have a stator portion configured to generate an alternating electric current responsive to the magnetic field. The generated electric current may be controlled by the stator portion of the generator module in order to magnetically control the rotational speed of the rotor and the turbine. Separation between the rotor and stator portions of the generator module may be magnetically maintained.12-01-2011
20100090463COMBINED ENVIRONMENTAL MONITORING AND POWER SUPPLY DEVICE - A wind turbine includes a tower, a machine nacelle and a rotor having a plurality of rotor blades and a hub. Furthermore the wind turbine includes at least one wind speed sensor device having at least one environmental monitoring apparatus for the detection of at least one environmental condition including a transducer device for converting the detected environmental conditions into an electrical signal and a converter device for converting energy provided by the environment into electrical output energy. The transducer device and the converter device are formed as an associated unit.04-15-2010
20120098262Energy production device from an omnidirectional Bi-axial flow - Lower ecologic and visual impact, associated with high energy production, is the main goals of this invention04-26-2012
20110198847DISTRIBUTED ELECTRICAL GENERATION SYSTEM - A distributed electrical generation system includes a plurality of turbines, generators, diode bridges, transformers and high voltage diodes. The system further includes a HVDC-cable and a high voltage inverter bridge. Each turbine drives a respective one of a plurality of electrical generators producing an alternating current. Each electrical generator is electrically connected to an associated diode bridge and each diode bridge rectifies the alternating current to a direct current. Each diode bridge is electrically connected to an associated transformer and each transformer steps up the direct current to a high voltage direct current. Each transformer is electrically connected in parallel to a high voltage direct current cable by associated high voltage diodes. The high voltage direct current cable is electrically connected to the high voltage inverter bridge. The high voltage inverter bridge converts the direct current to alternating current.08-18-2011
20110291414WIND POWER GENERATION SYSTEM AND METHOD OF CONTROLLING THE SAME - Provided is a wind power generation system intending to suppress an increase of torque when a voltage in a utility grid is restored, and to reduce a load to devices due to the torque. The blade control unit controls the pitch angle of the wind turbine blades such that a rotation speed of the power generator becomes equal to or greater than a synchronous rotation speed when the power control unit de-actuates the operations of the converter and the inverter, and controls the pitch angle of the wind turbine blades such that the pitch angle matches a target pitch angle that is determined based on one of a wind speed, a rotation speed of the power generator, and a requested output power when the power control unit re-actuates the operations of the converter and the inverter.12-01-2011
20110133458METHOD AND APPARATUS FOR OPTIMIZING WIND TURBINE OPERATION - A method for optimizing an operation of at least one wind turbine includes defining a plurality of test parameters that include a plurality of test points for at least one wind turbine operational parameter, wherein each test point includes a plurality of test values for the wind turbine operational parameter, and defining at least one test sequence of the plurality of test points. The method also includes initiating a test that executes the plurality of test points within the at least one randomized test sequence and measures at least one operating condition of the at least one wind turbine at each test point.06-09-2011
20080277938Wind Power Generation System and Operating Method Thereof - A wind power generation system wherein procedure for controlling the blade pitch is changed in accordance with the rate of decrease in the amplitude of the grid voltage, and when over current occurs in the grid-side power converter, the grid-side power converter is brought into the gate-blocked condition whereas the generator-side power converter continues its operation.11-13-2008
20080284172Method of start up at least a part of a wind power plant, wind power plant and use of the wind power plant - A wind power plant and a method of start up at least a part of a wind power plant connected to an external grid substantially without any energy delivered from the external grid for the start up is provided. The wind power plant having a plurality of wind turbines and at least one power source connected to at least one of the wind turbines in order to start the wind turbine while isolated from the remaining wind turbines. The started wind turbine may then supply power in order to start further wind turbines. Power may be delivered to the grid from the started wind turbines.11-20-2008
20110006527METHOD AND APPARATUS FOR CONTROLLING NOISE LEVELS OF A TURBINE WITH MINIMAL LOSS IN ENERGY YIELD - A method for controlling a tip speed of a blade of a wind turbine. The method includes determining the wind speed proximate the wind turbine; maintaining a first substantially constant rotational speed of the tip of the blade during variable wind speeds above a first predetermined nominal wind speed and below the second predetermined nominal wind speed; maintaining a second substantially constant rotational speed of the tip of the blade during variable wind speeds above a second predetermined nominal wind speed. The noise generated by wind at the second predetermined nominal wind speed is greater than noise generated by the blade at the second constant rotational speed of the tip of the blade.01-13-2011
20100060002WIND TURBINE DIRECT CURRENT CONTROL SYSTEM AND METHODS - A wind turbine control system converts AC power generated by the wind turbine to DC power for use in a load. The control system may include a plurality of modules that convert the AC power to DC power. The control system may include a turbine module that converts the AC power produced by a generator of the wind turbine to DC power. The turbine module may also include a boost converter that boosts the DC current to a higher voltage that improves efficient transfer of the DC power to the load. The control system may further include an output module having a buck converter that bucks the voltage of the DC power to a level needed for use by the load. The control system may control the amount of power generated by the wind turbine based on power needs of the load.03-11-2010
20100032947Apparatus for generating power using jet stream wind power - A wind energy generator for employment in the jet stream or other wind conditions is described herein. The craft includes an airfoil and at least one wind energy generating device. The craft further includes a variable geometry tail boom unit whose orientation relative to the rest of the craft can be adjusted in accordance with the needs of the user. The craft is tethered to the ground. The wind energy generating devices transferring generated electrical power back to the ground using a conductive transfer line or alternative energy transfer means. The can craft further include an airframe onto which the wind energy generating devices can be mounted the airframe can include an open structured airframe. The invention further describes method of putting an energy generating craft into the air. The method comprises becoming airborne in a vertical configuration, transitioning a tail boom into an orientation parallel to plane of the airfoil and entering a horizontal flight configuration.02-11-2010
20090309360METHOD FOR CONTROLLING A WIND ENERGY PLANT - The present invention is related to a method for controlling a wind energy plant with plural control units, which perform control tasks in the wind energy plant, comprising the following steps: 12-17-2009
20120187681WIND TURBINE AND A METHOD FOR POWERING ONE OR MORE HYDRAULIC PITCH ACTUATORS - A wind turbine for producing power to a utility grid includes a rotor having one or more blades, wherein the rotor further includes one or more hydraulic pitch actuators for actively controlling the pitch angle of one or more of the blades. The wind turbine also includes one or more actuator hydraulic pumps adapted for powering the hydraulic pitch actuators, wherein the one or more actuator hydraulic pumps are powered by a normal operation energy source. The wind turbine further includes an emergency hydraulic pump also adapted for powering the hydraulic actuators, the emergency hydraulic pump being powered by an electrical energy storage. A method for powering one or more hydraulic pitch actuators for actively controlling the pitch angle of one or more blades of a wind turbine is also disclosed.07-26-2012
20090121483METHODS AND SYSTEMS FOR WIND TURBINE GENERATORS - Methods and systems for reducing heat loss in a generator system are provided. The generator system includes an electrical generator and a power converter. The method includes generating electricity in the generator at a first power factor and converting electricity in the converter at a second power factor in a first mode of operation and generating electricity in the generator at a third power factor wherein the third power factor is greater than the first power factor and converting electricity in the converter at a fourth power factor wherein the fourth power factor is less than the second power factor in a second mode of operation such that the power output of the generator system in the second mode of operation is substantially equal to the power output of the generator system in the first mode of operation and the generator currents are facilitated being reduced.05-14-2009
20100013226Tethered Autonomous Air Vehicle With Wind Turbines - A wind turbine energy conversion device that can take advantage of the higher speed and more persistent winds at higher altitudes is hereinafter disclosed. The wind turbine energy conversion device includes an unmanned aerial vehicle (UAV) connected to one end of a tether (which may include multiple shorter tethers), the other end being connected to a terrestrial anchorage point. The UAV flies at altitudes where wind speeds can reach 40 mph or higher. The UAV comprises a flying wing with one or more trailing wind power turbines and flies airborne maneuvers designed to increase relative wind speed up to about four times the true wind speed.01-21-2010
20090033096METHOD FOR THE DETERMINATION OF A CONTROL RESERVE AND WIND ENERGY PLANT WITH A CONTROL UNIT FOR THE DETERMINATION OF THE CONTROL RESERVE - A method for the determination of a control reserve of one or plural wind energy plants, for the operation of which a desired value for at least one electric variable is preset, and for which a control unit is provided which has a power curve, which contains a maximum value of the electric variable depending on values of the wind, the method having the following steps: the control unit determines a maximum value of the electric variable from the actual value of the wind and subtracts a current value of the electric variable from the same, the control unit transmits the determined maximum value and/or the difference as a control reserve to a higher order control unit and/or an external utility.02-05-2009
20090146424SYSTEM AND METHOD FOR CONTROLLING A WIND POWER PLANT - An apparatus and method for extending the power-capture region of a wind turbine during certain operating conditions is disclosed. The actual set point of an operational parameter is selected so as to be maintained at a predetermined number of standard deviations away from an operating limit during certain operating conditions. For example, the operational parameter may be a rotor/generator speed and the operating condition may be a mean wind speed that exceeds a predetermined wind speed.06-11-2009
20090189393MICRO WIND TURBINE TOPOLOGY FOR SMALL SCALE POWER GENERATION - A wind energy converter has a generator adapted to be coupled directly to a wind turbine without need for a mechanical gear unit. A rectifier is coupled to the generator and a converter is coupled to the rectifier to provide a regulated DC bus voltage as a function of a controlled duty cycle. An inverter is coupled to the converter for providing a regulated AC output to a load.07-30-2009
20090096213Vertical axis wind turbine and method of making the same - The present invention includes a vertical axis wind turbine apparatus including a spindle tube connectable to a permanent foundation such that a spindle axis is oriented substantially orthogonal to a surface upon which it is placed, such as the ground or other stable surface. The apparatus described herein also includes a rotor disposed at least partially within the spindle tube and rotationally engaged therewith such that a rotor axis is oriented substantially parallel to the spindle axis. The apparatus can also include a truss system extending radially from the rotor and a blade assembly movably connected to the truss system and adapted for rotation about the spindle axis and the rotor axis. The truss system functions in part to permit rotation of the blade assembly while increasing the swept area of the turbine and thus the resultant energy capture.04-16-2009
20090146423Power Generating System - Provided is a power generator, including a plurality of wind power generators generating electrical power using wind power energy, and variable-speed wind power generators (06-11-2009
20090146425SYSTEM AND APPARATUS FOR THE GENERATION OF ELECTICAL POWER - An application for an electrical power generator includes a set of fan blades coupled to a shaft, the fan blades are in fluid communication with an air conditioner condenser fan whereby the fan blades turn in response to air flow caused by the air conditioner condenser fan. A generator is coupled to the shaft for converting rotational energy of the shaft into electrical energy.06-11-2009
20110260455VERTICAL AXIS WIND TURBINE - A vertical axis wind turbine includes an upstanding support structure, a plurality of generators disposed on the support structure, a central shaft in rotatable communication with the generators and positioned along a central axis of the vertical-axis wind turbine, a plurality of struts extending from the central shaft, and a plurality of blades, each blade positioned at an end of a corresponding strut and oriented substantially vertically. The vertical axis wind turbine optionally includes strut ailerons, blade extension elements, or blade ailerons to increase the efficiency and duty cycle of the wind turbine.10-27-2011
20080265578METHOD FOR OPERATION OF A WIND ENERGY INSTALLATION AND A WIND ENERGY INSTALLATION - The invention relates to a method for operation of a wind energy installation, having a rotor (10-30-2008
20120025526SYSTEM AND METHOD FOR MONITORING WIND TURBINE GEARBOX HEALTH AND PERFORMANCE - A system and method are provided to monitor the health and performance of a wind turbine gearbox. A plurality of sensors coupled to the wind turbine gearbox provide input to a controller. The controller generates output information that includes performance and health information of the wind turbine gearbox based on the input received from each of the sensors.02-02-2012
20100123314PROTECTION SYSTEM FOR WIND TURBINE - A braking system for a wind turbine is provided, and the wind turbine includes a rotor having at least one blade. A generator includes a plurality of stator windings having a plurality of phases. The braking system includes a plurality of resistors, and at least one switch connected between the stator windings and the resistors. The switch can be configured to connect the stator windings to each other via the resistors, for the effect of slowing down or stopping the rotor of the wind turbine.05-20-2010
20090309359WIND TURBINE SENSOR ASSEMBLY AND METHOD OF ASSEMBLING THE SAME - A sensor assembly for use with a wind turbine rotor blade is provided. The sensor assembly includes an air data probe including a base shaft, a tip, and a rod portion extending therebetween, wherein the rod portion is fabricated from a composite material. The sensor assembly includes a receptacle configured to couple within the leading edge of the rotor blade for receiving the base shaft therein such that the tip extends a distance from the leading edge when the base shaft is received within the receptacle.12-17-2009
20090309362GENERATOR UTILIZING FLUID-INDUCED OSCILLATIONS - An electrical generator including a magnetic field generator and at least one energy converter for converting energy present in fluid flows into vibrations or oscillations. The converter includes a flexible membrane having at least two fixed ends. The membrane vibrates when subject to a fluid flow. One of the electrical conductor and the magnetic field generator is attached to the membrane and configured to move with the membrane. The vibration of the membrane caused by the fluid flow causes a relative movement between the electrical conductor and the applied magnetic field. The relative movement causes a change in the strength of the magnetic field applied to the electrical conductor, and the change in the strength of the magnetic field applied to the electrical conductor induces a current flowing in the conductor.12-17-2009
20090224542WIND TURBINE OPERATIONAL METHOD - Operation method for a variable speed wind turbine which comprises control methods for blade pitch in cases of extreme gusts of wind, characterised by the fact that it is comprised of the following steps: a) detection of the presence of an extreme gust of wind; b) performance of a sudden increase in pitch within the range of 6 to 14 degrees at the maximum speed permitted by the wind turbine blade pitch control mechanisms. The method also includes an additional step; c) vary the generator speed to avoid an increased acceleration of the generator which could make a subsequent step b) necessary.09-10-2009
20090021012INTEGRATED WIND-POWER ELECTRICAL GENERATION AND COMPRESSED AIR ENERGY STORAGE SYSTEM - The present invention relates to a method and apparatus for using wind energy to compress air or pressurize a fluid as a means of storing energy. Compressed air or pressurized fluid is generated directly by the wind turbines, thereby avoiding the energy losses that occur when wind power is used first to generate electricity to run an electrically powered air compressor. The compressed air or pressurized fluid is stored by means of expanding a volume at constant or nearly constant pressure. This method avoids energy losses that would otherwise result from compressional heating; while also allowing lower pressures to be employed, reducing the cost of the containment facility and avoiding the need to locate facilities in geographically favored locations where underground storage is available. The invention permits both large and small-scale storage at low cost per unit of energy stored, thereby avoiding the difficulty of using a highly variable and unreliable source of energy such as the wind for electrical power generation. The invention can be used for generation and storage on land, in shallow near-shore waters and in deep-water locations far from shore.01-22-2009
20100007145STALL CONTROLLER AND TRIGGERING CONDITION CONTROL FEATURES FOR A WIND TURBINE - Control features for a wind turbine that control the turbine over a range of wind speeds and under triggering conditions with reduced noise, cost, and reliability issues associated with other such controls. Control is accomplished via control electronics, which adjust the torque produced by the electrical output generation device (e.g., alternator) within the wind turbine. During normal operation, torque is adjusted for optimum aerodynamic performance and maximum output of power. In winds above rated power, the control circuit regulates torque to lower aerodynamic performance, as necessary to maintain desired power level output. In triggering conditions, such as during simultaneous control circuit failure and loss of some portion of the electrical output generation device in extreme winds, wind turbine control is accomplished by increasing torque (e.g., via a separate controller) from the electrical output generation device via shorting of windings, so as to cause retardation of blade rotation.01-14-2010
20100133823HYBRID BRAKING SYSTEM AND METHOD - A wind turbine hybrid braking system is presented. The system includes a generator coupled to a main shaft of the wind turbine for generating and transmitting power. A mechanical brake is coupled to the main shaft for applying reaction torque upon braking of the wind turbine. The system further includes an electrical braking circuit coupled to the generator for acting in conjunction with the mechanical brake and dissipating active power via controlled switching.06-03-2010
20120292904METHOD FOR EMULATION OF SYNCHRONOUS MACHINE - The present invention relates to electric energy sources, such as a single wind power turbine or wind power plant, that are interfaced with the utility grid through power electronic converters. In particular, the present invention relates to specific techniques and methodologies for power electronic converters for stabilizing the utility grid during transient conditions and for providing similar stability mechanisms that are inherently present in electric synchronous generators while maintaining the possibility for fast and decoupled following of set points for generated active and/or reactive powers.11-22-2012
20110187105MAINTENANCE OPERATION METHOD FOR WIND TURBINE GENERATOR AND WIND TURBINE GENERATOR - The present invention provides a maintenance operation method for a wind turbine generator and a wind turbine generator, which can effectively utilize a phase advance capacitor equipped in the wind turbine generator and contribute to the phase factor improvement of the system side. A maintenance operation method for a wind turbine generator including an induction generator 08-04-2011
20110187104PITCH DRIVE APPARATUS OF WIND GENERATOR AND WIND GENERATOR - The invention provides a pitch drive apparatus of a wind generator and the wind generator capable of, with a simple structure, preventing reliability of the pitch drive apparatus from being deteriorated. The wind generator includes a wind turbine rotor blade having a blade root mounted so as to be turnable around an axis center O with respect to a rotor head, and a pitch drive apparatus for turning and driving the wind turbine rotor blade around the axis center O to change a pitch angle thereof. The pitch drive apparatus has an electric cylinder functioning as a linear actuator.08-04-2011
20110062710MULTI-STAGE CONTROLLED FREQUENCY GENERATOR FOR DIRECT-DRIVE WIND POWER - A multi-sage controlled frequency generator is described that has a low size, weight and cost. The new generator requires an electronic controller that requires only 25% of the total generated power (100%) when the generator shaft speed varies by +/−25% around its synchronous speed. The shaft driving the generator in the direct-drive controlled frequency generator may be moved at a variable speed. The output frequency of the generator may be controlled by electrically controlling the frequency of the first stator stage and by selecting the control frequency, the number of poles, and the number of stages, such that the output of the last stage will be maintained constant at the desired grid frequency.03-17-2011
20100084863VARIABLE VANE VERTICAL AXIS WIND TURBINE - An embodiment of a vertical axis wind turbine (VAWT) with a turbine shaft for transmitting mechanical power. Coupled to the turbine shaft is a support structure with a vane rotatably coupled to the support structure at a vane shaft. The vane rotates the vane shaft, support structure and the turbine shaft around the center of the turbine shaft when the vane is acted upon by the wind. A centrifugal compensation rod is connected to the vane. The centrifugal compensation rod counteracts the centrifugal forces acting upon the vane as the vane rotates about the center of the turbine shaft.04-08-2010
20100140940SYSTEM AND METHOD FOR CONTROLLING WIND TURBINE ACTUATION - A wind turbine includes a plurality of wind turbine blades attached to a rotor positioned atop a tower affixed to a tower foundation. At least one blade pitch sensor is configured to measure blade pitch angles for one or more of the wind turbine blades. A rotor/generator speed sensor is configured to measure the rotational speed of the wind turbine rotor, a corresponding wind turbine generator, or both. A wind turbine nacelle yaw sensor is configured to measure the nacelle yaw, while at least two tower-base bending sensors are configured without use of adhesives, cements or bonding agents to provide large-area measurement of tower deflection. A controller is configured to adjust the pitch angle of one or more of the wind turbine blades in response to the measured one or more blade pitch angles, the measured rotational speed, the measured nacelle yaw and measured tower longitudinal deflection.06-10-2010
20100078940CONTROLLER AND CONTROL METHOD FOR WINDFARM - In a controller for a windfarm including a plurality of wind turbine generators controllable in rotation frequency and pith of blades of the wind turbine generators, coupled to a grid through a transmission line, an anemometer is provided to each wind turbine generator to transmits wind direction and wind speed data to a central controller which process the wind direction and wind speed data to transmit an output command each wind turbine generator. The central controller predicts, on the basis of the wind speed detected by the upstream wind turbine generator, variation in wind speed at other wind turbine generators to control the output of the windfarm. The output power may be limited or charging energy as rotation energy of blades and discharging the rotation energy as output power in addition to a battery unit for averaging.04-01-2010
20090206604METHOD OF TRANSPORTING BULKY EQUIPMENT OF A WIND POWER PLANT, PREASSEMBLED EQUIPMENT - The invention relates to preassembled equipment and a method of transporting bulky equipment of a wind power plant from a preassembly site to an installation site, the equipment comprising at least two modules, the method comprising the steps of preassembling the modules onto a support, wherein the modules are placed at a first distance from another, transporting the support with the modules from the preassembly site to the installation site, and at the installation site, displacing the modules and fixing them at the support at a second distance being greater than the first distance While the equipment provides for sufficient space, e.g. for maintenance aisles, in its unpacked form, by transporting it in a preassembled and packed form, transportation and installation are considerably simplified.08-20-2009
20090174187Methods For Controlling A Wind Turbine Connected To The Utility Grid, Wind Turbine And Wind Park - The invention relates to methods for controlling a wind turbine connected to the utility grid by detecting status of the utility grid, and controlling one or more rotor blades and/or emitted power to the grid in returning to the operational wind turbine settings of normal grid mode. The invention also relates to a wind turbine and a wind park comprising at least two wind turbines.07-09-2009
20100090464ADAPTIVE ADJUSTMENT OF THE BLADE PITCH ANGLE OF A WIND TURBINE - It is described a method of determining a quality of an initial value for a blade pitch angle. An initial power captured by a wind turbine is measured, while the blade pitch angle has the initial value. The blade pitch angle is changed from the initial value to a first value in a first direction. A first power captured by the wind turbine is measured and the blade pitch angle is changed to a second value in a second direction being opposite to the first direction. Further, a second power captured by the wind turbine is measured, a power difference between the first power and the second power is calculated, and the quality of the initial value based on the calculated power difference is determined. Further, a control system, a wind turbine and a computer program are described.04-15-2010
20090102196METHOD AND SYSTEM FOR DETERMINING THE COMPATIBILITY OF CONTROL SOFTWARE WITH A WIND ENERGY INSTALLATION - A method and a system are for determining of the compatibility of control software, which is designed for standard parameters, with a wind energy installation which is operated using operating parameters. The method is an automatic method in which the operating parameters of the wind energy installation and the standard parameters of the control software are first transmitted to a computation unit. The computation unit determines discrepancies between the operating parameters and the standard parameters. A decision on compatibility is made on the basis of the discrepancies. The system includes a logic module which is designed to make the decision. This method makes it easier to automatically update the control software for a wind energy installation. There is no longer any need to manually check the compatibility of the new version of the control software before the new version of the control software can be installed.04-23-2009
20120193918WIND TURBINE CONTROL METHODS AND SYSTEMS - Improved wind turbine control methods and systems. The invention relates to a method for the operation of a variable speed wind turbine having pitch and torque control means that include additional steps for providing to the pitch control means in case of a wind gust a pitch angle reference increment Dθref in the amount needed for avoiding that the aerodynamic torque added by the wind gust exceeds a predetermined limit. The present invention also relates to a wind turbine comprising a control system arranged for performing an additional regulation in case of wind gust08-02-2012
20090273187Control Method - A generator of a wind turbine is at low power conditions operated as a motor by control of a frequency converter to feed electric power from an electric power transmission network to the generator for raising the speed of the wind rotor above a predetermined level for lubricating rotating parts of a drive train of the wind turbine.11-05-2009
20090295161METHOD FOR OPERATING A WIND ENERGY INSTALLATION AND A WIND ENERGY INSTALLATION - The invention relates to a method for operating a wind energy installation (12-03-2009
20100276930WIND TURBINES HAVING CONTROL FOR NETWORK FAULTS AND OPERATING METHOD THEREOF - A network disturbance module for a control device of a wind energy installation having a generator driven by a wind rotor and a converter for producing electrical power fed into a network. The module includes a measurement device configured to measure at least one electrical parameter of the network, a detector configured to identify a network disturbance and output a switching signal, and a reference generator configured to produce a substitute reference vector for the converter based on the at least one electrical parameter. The module also includes a fault management unit comprising a fault classifier, the unit being configured to interact with the measurement device, detector, and reference generator such that, in the event of an undervoltage during island operation, a quick-action frequency regulator is activated. The regulator acts on the converter to vary a real-power feed P in the event of a discrepancy in a network frequency.11-04-2010
20100276929SYSTEM AND METHOD FOR DETERMINING THE TEMPERATURE OF A PERMANENT MAGNET IN A MACHINE - A system for determining a temperature of a permanent magnet in a machine includes a voltage sensor that generates a voltage signal reflective of a stator voltage and a current sensor that generates a current signal reflective of a stator current. A processor receives the voltage and current signals and generates a temperature signal reflective of the temperature of the permanent magnet in the machine. A method for controlling a load of a machine includes generating a voltage signal, a current signal, and a temperature signal reflective of the temperature of a permanent magnet in the machine. The method further includes adjusting the load of the machine based on the temperature signal.11-04-2010
20090289455METHOD OF OPERATING A WIND POWER STATION - When planning and setting up wind power installations, the visual detractions to be expected on the part of the wind power installation on the environment play an increasingly important part in approval and acceptance. The shadow casting caused by the wind power installation on the adjoining properties is often perceived by the residents as being very troublesome.11-26-2009
20090289454METHOD OF OPERATING A WIND POWER STATION - When planning and setting up wind power installations, the visual detractions to be expected on the part of the wind power installation on the environment play an increasingly important part in approval and acceptance. The shadow casting caused by the wind power installation on the adjoining properties is often perceived by the residents as being very troublesome.11-26-2009
20130099494WIND TURBINE GENERATOR AND YAW CONTROL METHOD FOR WIND TURBINE GENERATOR - A wind turbine generator, which is a wind turbine generator that turns a nacelle in the yaw direction by using the force that acts on turbine blades, includes a yaw brake device that stops the turning of the nacelle in the yaw direction and a control device that controls the yaw brake device so that the turning speed of the nacelle falls within a predetermined range. Therefore, the wind turbine generator can make the turning speed of the nacelle constant.04-25-2013
20130099495POWER CONTROL METHOD AND SYSTEM FOR WIND GENERATING SET - The invention provides a power control method and a power control system for a wind generating set. The method comprises: acquiring an actual torque T04-25-2013
20110198846VARIABLE-SPEED POWER GENERATOR AND METHOD OF CONTROLLING THE SAME - Reactive power is supplied in accordance with a reactive-power supply instruction from a power grid while ensuring a variable-speed range of a wound-rotor induction generator. A variable-speed power generator includes a prime mover that generates motive power by using natural energy; an electric generator that includes a stator having a primary winding and a rotor having a secondary winding, the stator and the rotor being connected to a power grid, and that generates electric power based on the motive power generated by the prime mover; and a power converter connected to the stator and the rotor, wherein the power converter does not supply reactive power to the power grid, and wherein the variable-speed power generator includes a power-converter controller that causes the electric generator to operate at a rotation speed set to be higher than or equal to a synchronous speed and increases reactive power supplied to the power grid when a reactive-power supply instruction for supplying reactive power to the power grid is obtained from the power grid.08-18-2011
20090295162WIND POWER GENERATION SYSTEM OF A TYPE PROVIDED WITH POWER STORAGE SYSTEM - A wind power generation system having a group of wind turbine generators includes a superior controller having a generation power recording memory to record a sum of a generation power of the group of wind turbine generators and a charge and discharge power of a power storage system, a charge and discharge power command computing device for computing a charge and discharge power command for the power storage system in a second period by making use of information of the output power in a first period computed in the output power computing unit and information of a detection value at the present of the generation power recording memory, and a charge and discharge power control device.12-03-2009
20090295160METHOD FOR INCREASING ENERGY CAPTURE IN A WIND TURBINE - A method for operating a wind turbine. The method includes providing a wind turbine having a variable speed control system, the control system having an initial rotational speed set point. At least two operational parameters are obtained from one or more sensors. An adjusted rotational speed set point greater than the initial rotational speed set point is determined in response to the operational parameter. The control system is configured with the adjusted rotational speed set point. A wind turbine and wind turbine plant are also disclosed.12-03-2009
20090295159Adaptive Pitch Control for Variable Speed Wind Turbines - An adaptive for adjusting blade (12-03-2009
20100127494PITCH CONTROL SYSTEM AND METHOD FOR WIND TURBINES - The present invention describes a pitch control system comprising a principal converter, and auxiliary converter, a direct current motor and a power storage system (accumulator) and has four different operation modes: normal, fault (first level), fault (second level) and emergency. In the case that a fault is detected, the system can move the motor in order to move the vanes to the desired position by making a controlled adjustment.05-27-2010
20110204638WIND TURBINE WITH INTEGRATED ROTOR AND GENERATOR ASSEMBLY - A wind turbine and related methods for generating electrical current from wind energy. The wind turbine includes a rotatable substructure rotating about a vertical axis and a base assembly. A plurality of wind collectors are affixed to the periphery of the rotatable substructure and provide drag against wind passing the wind turbine to rotate the rotatable substructure. A plurality of permanent magnets are affixed to the rotatable substructure and rotate as the rotatable substructure turns. A plurality of wire windings are affixed to the base assembly such that the wire windings are exposed to magnetic fields of the permanent magnets as the substructure is rotated to generate an electrical current. The plurality of wire windings can be adapted to receive the electrical current and act as electromagnets for braking the rotatable substructure to slow or otherwise prevent the rotation of the rotatable substructure.08-25-2011
20110204634Synchronous Induced Wind Power Generation System - A synchronous induced wind power generation system is provided, which is comprised of a horizontally rotatable turbine-generator section that wind vanes into the prevailing wind direction. The turbine-generator section has a horizontally disposed turbine therein, and air induction shrouds at either end thereof, the anterior areas of the air induction shrouds having larger areas than the interior area of the turbine-generator section, so as to induce a large differential air pressure across the turbine. The turbine is directly coupled to a synchronous AC generator that is synchronized with an external power line in connection therewith, and directly generates synchronous AC power. Further, turbine magnetic brakes are employed 1) during synchronization with the electrical line, 2) to modulate turbine power, and 3) to protect against overspeed during high wind and loss of load.08-25-2011
20110204637Apparatus For Coupling An Energy Storage System To A Variable Energy Supply System - A method for coupling an energy storage system to a variable energy supply system includes providing an energy storage system including at least one Vanadium redox battery and at least one battery charge controller. The method also includes electrically coupling the at least one battery charge controller to the variable energy supply system such that the at least one battery is configured to supply a substantially consistent energy output during fluctuating energy loads of the energy supply system.08-25-2011
20110204635SYSTEM AND METHOD FOR CONTROLLING WIND TURBINE POWER OUTPUT - A system and method for use in controlling a wind turbine's power output by a wind turbine controller. The method includes determining a predicted wind speed for the wind turbine, determining a current wind turbine power output, and determining a predicted wind turbine power output utilizing the predicted wind speed. The method also includes comparing the current wind turbine power output to the predicted wind turbine power output and adjusting the wind turbine power output based on the comparison of the current wind turbine power output and the predicted wind turbine power output.08-25-2011
20110204633STARTING METHOD FOR ROTATING MACHINE AND STARTING METHOD FOR WIND TURBINE GENERATOR - A starting method is provided for a rotating machine which includes a main shaft, a main bearing rotatably supporting the main shaft and a main bearing lubricant pump circulating lubricant through the main bearing. The starting method includes steps of: rotating the main shaft to raise a temperature of the main bearing in a state in which the main bearing lubricant pump is not operated; and operating the main bearing lubricant pump to start supplying the lubricant to the main bearing after the step of raising the temperature of the main bearing.08-25-2011
20110204630WIND POWER GENERATION SYSTEM AND OPERATION CONTROL METHOD THEREOF - The object is to reduce an output fluctuation in an interconnection node. Provided is an operation control method of a wind power generation system including a step of obtaining the output data of each wind turbine, a step of determining a correlation between output fluctuations of adjacent wind turbines by using output data, and a step of shifting, if a strong correlation is exhibited, a phase of output fluctuation of either one of the adjacent wind turbines by a period at which the strong correlation is exhibited.08-25-2011
20090261588METHOD AND SYSTEM FOR OPERATING A WIND ENERGY INSTALLATION - A method for operating a wind energy installation and a system for implementing the method. An oblique incident flow value, which represents the difference between the wind direction and the direction of a rotor axis of the wind energy installation, and a load value, which represents the load state of the wind energy installation, are determined. A total load value is determined based on the load value and the oblique incident flow value. The rotor rotation speed is reduced when the total load value is above a first limit value. The wind energy installation is shut down when, in addition, a second limit value is exceeded. The method makes it possible to react objectively to oblique incident flows and can reduce a load on a wind energy installation without causing large yield losses.10-22-2009
20090261589Wind Power Generation System And Operation Method Thereof - A wind power generation system wherein procedure for controlling the blade pitch is changed in accordance with the rate of decrease in the amplitude of the grid voltage, and when over current occurs in the grid-side power converter, the grid-side power converter is brought into the gate-blocked condition whereas the generator-side power converter continues its operation.10-22-2009
20110204636WIND TURBINE AND OPERATING SAME - A method for operating a wind turbine erected in a body of water, comprising: measuring vibrations of the wind turbine during operation; identifying at least one periodic component of said measured vibrations, wherein said periodic component is associated with interaction of said body of water and said wind turbine; and, operating at least one controller of said wind turbine so that water-induced vibrations are reduced.08-25-2011
20090039650EVENT MONITORING VIA COMBINATION OF SIGNALS - A method for event monitoring for a wind turbine is described. The method includes measuring a first signal pattern representing a characteristic selected from a characteristic group, the characteristic group consisting of: a mechanical characteristic of a wind turbine, emitted noise of a wind turbine, emitted noise of a part of a wind turbine; power output of a wind turbine, surface conductivity of parts of a wind turbine, operational data of a wind turbine, temperature of parts of a wind turbine, outside temperature, wind velocity, wind direction, and outside air humidity or other weather conditions; measuring at least a second signal pattern representing a different characteristic selected from the characteristic group; analyzing the first and the second signal pattern or a combination of the first and the second analyzed signal pattern with an analyzing method, wherein analyzed data is generated; and evaluating the analyzed data, wherein the evaluation provides a result indicative for an event.02-12-2009
20120292903METHOD FOR OPERATING A WIND TURBINE - A method is provided for operating a wind turbine with a rotor having a rotor blade adjustable in its blade pitch angle. A generator is connected to the rotor and a measurement unit captures an actual value of a variable representative of a rotational speed of the generator. A set-point for a generator torque is provided and the set-point thereof is corrected. An actual value of a variable representative of a rotational speed of the generator is captured. A set-point for the torque as a function of the captured actual value is provided and the set-point for the torque as a function of a parameter for air density is corrected. A pitch angle value is captured and the set-point for the torque is increased when the captured value for the pitch angle exceeds a minimum value and has been corrected on the basis of an air density parameter.11-22-2012
20120292905METHOD OF IN SITU CALIBRATING LOAD SENSORS OF A WIND TURBINE BLADE - A method of in situ calibrating load sensors of a horizontal axis wind turbine is described. The method comprises the steps of: a) determining a rotor azimuth angle of a first wind turbine blade, b) determining a pitch angle of the first wind turbine blade, c) measuring loads in a first cross-section of the first wind turbine blade using the first load sensors, d) calculating theoretical loads based on at least the rotor azimuth angle and the pitch angle of the blade determined in steps a) and b), e) comparing the loads measured in step c) with the theoretical loads calculated in step d), and f) calibrating the first load sensors based on the comparison of step e), wherein the calibration are based only on measurements carried out, when the generator is cut out.11-22-2012
20100102559WIND TURBINE ARRANGEMENT AND METHOD FOR ALIGNING A WIND TURBINE WITH THE WIND DIRECTION - A method for aligning a wind turbine with the wind direction is provided. The method includes measuring at least one first pressure at a first side of the wind turbine's nacelle, determining the pressure difference between the measured first pressure and a second pressure, and rotating the nacelle in dependence to the determined pressure difference. A wind turbine arrangement including a nacelle, a yaw alignment controller, and a yaw drive is also provided.04-29-2010
20100102557WIND-DRIVEN POWER PLANT EQUIPPED WITH FOLDING AND LIFTING MECHANISM FOR RAISING AND STOWING THE TOWER - A wind-driven electric plant includes a mast with a windwheel and a generator, a shielding chamber with a base, walls and a cover. According to one embodiment, said mast is attached to the shielding chamber base by a fastening-lifting device attached to a mast transfer mechanism for stowing the mast into the chamber or placing the mast into operating position. The mast comprises a set of pivotally connected sections, with the ability to fold and spread, preferably under the control of an automatic control device. In a second embodiment, the mast comprises a set of telescoping sections attached to a post, rigidly fastened to the base of the chamber, with the ability of the mast vertical movement therein. Both embodiments preferably comprise both manual control and automatic remote control. Also, both embodiments preferably comprise a mechanism for opening and closing the shielding chamber cover connected to an automatic control device.04-29-2010
20100140938SYSTEM, DEVICE, AND METHOD FOR CONTROLLING A WIND TURBINE USING SEASONAL PARAMETERS - A method for controlling an operation of a wind turbine. A plurality of operating specifications, each of which corresponds to a season, is defined. A current season is determined. An operating specification corresponding to the current season is selected. An operation of a wind turbine is controlled based at least in part on the selected operating specification. The current season may be determined, for example, based on a schedule of seasons and/or meteorological conditions.06-10-2010
20110266800PROTECTION CIRCUIT APPLIED TO WIND POWER GENERATION SYSTEM EMPLOYING DOUBLE-FED INDUCTION GENERATOR - There is provided a protection circuit that protects a power converter connected to a secondary winding of a double-fed induction generator, the protection circuit including a rectifying unit connected to the secondary winding and configured to rectify an electric power coming through the secondary winding, a power consumption unit configured to consume the electric power rectified by the rectifying unit, and a switching unit connected to the power consumption unit in series and configured to switch to adjust the electric power flowing into the power consumption unit.11-03-2011
20110266798WIND TURBINE GENERATOR AND START-UP METHOD OF THE SAME - A start-up method of a wind turbine generator includes a step of increasing a pitch angle of a wind turbine blade from a feather pitch angle to a fine pitch angle. The step of increasing the pitch angle of the wind turbine blade includes steps of: determining based on first to n-th pitch angles (n≧2) greater than the feather pitch angle and smaller than the fine pitch angle and first to n-th rotational speed conditions associated with the first to n-th pitch angles, respectively, whether a control target rotational speed, which is a wind turbine speed or generator speed, satisfies the i-th rotational speed condition when the pitch angle reaches the i-th rotational speed out of the first to n-th pitch angles, the first to n-th pitch angles and the first to n-th rotational speed conditions being stored in a storage unit; decreasing the pitch angle to the (i−1)-th pitch angle or the feather pitch angle in a case that the control target rotational speed does not satisfy the i-th rotational speed condition when the pitch angle reaches the i-th pitch angle; and increasing the pitch angle to the (i+1)-th pitch angle or the fine pitch angle in a case that the control target rotational speed satisfies the i-th rotational speed condition when the pitch angle reaches the i-th pitch angle.11-03-2011
20110204632Synchronous Induced Wind Power Generation System - A synchronous induced wind power generation system is provided, which is comprised of a rotatable turbine-generator section and a control system operable to rotate same in a direction corresponding to optimal wind conditions. The turbine-generator section has a horizontally disposed turbine therein in an interior area thereof, and orifices formed at either end thereof, with wider areas than the interior area, so as to form a funnel-like shape at either of the turbine-generator section. These funnel-shaped sections optimally funnel wind to the turbine, which is connected to a synchronous generator that runs at synchronous speed with an external power line in connection therewith. Further, turbine brakes are employed to modulate turbine power and speed, and the control system is operable to orient the turbine-generator section with respect to the direction of the wind and generation of power via control of the turbines and synchronous generator, and via receipt of sensor/detector data received from a plurality of sensors/detectors in communication therewith.08-25-2011
20080238100Method for operating a wind energy system - The invention relates to a method for operating a wind energy system wherein when a first settable boundary value (G10-02-2008
20090167021WIND POWER INSTALLATION AND METHOD OF OPERATING IT - The purpose of the invention is to reduce the contribution of wind power installations to frequency errors on the grid, and preferably to contribute to the elimination of such errors. Thus, the method involves the use of PID control and/or control with hysteresis so as to regulate the active power injected into the grid, in view of the deviation between a measured grid frequency and the nominal grid frequency.07-02-2009
20090001726Energy Supply for a Blade Adjustment Device Pertaining to a Wind Energy Installation - A wind energy installation includes a tower provided with rotor blades that are adjusted using a servomotor connected to a pitch circuit and an emergency circuit. During normal operation the rotor blades are actuated by the pitch circuit and during emergency operation are actuated by the emergency circuit. The emergency circuit has an electric energy store, a switching device, connection lines to the servomotor and a protection device which includes comprises a power flow detector module (01-01-2009
20100133829IMPROVEMENTS IN OR RELATING TO WIND TURBINES - A wind turbine system comprising: a wind turbine; a regenerative drive system; a wind-speed sensor for measuring local wind speed; and a controller; the wind turbine comprising a motor-generator system which is operatively connected to the regenerative-drive system; the motor-generator system being drivable as a motor by the regenerative drive system to increase a rotational speed of the wind turbine; the motor-generator system being operable as a generator by the regenerative drive system to decrease a rotational speed of the wind turbine; the controller being operatively connected to the wind-speed sensor and the regenerative drive system, wherein the controller is operable to control operation of the regenerative-drive system to thereby control the rotational speed of the wind turbine in response to signals received from the wind sensor indicative of gusting changes in the local wind speed.06-03-2010
20080284170Augmented wind power generation system using continuously variable transmission and methd of operation - A wind power generating apparatus is provided. The apparatus includes a plurality of vertically stacked wind acceleration modules that are shaped to accelerate wind passing between them. At least one of the modules includes a rotor assembly, a continuously variable transmission (CVT) mechanically coupled to the rotor assembly, and an electrical generator mechanically coupled to the CVT. The electrical generator is capable of converting mechanical energy transferred by the CVT from the rotor assembly into electrical energy. A sensor may be mechanically coupled to the rotor assembly or the electrical generator and electrically coupled to a controller. The controller may control the CVT according to a signal received from the sensor such that the electrical generator operates within a predetermined range of rotational velocities.11-20-2008
20090096212POWER GENERATION SYSTEM - A power generation system is disclosed for supplying power to an electrical grid. The system comprises a synchronous machine and coupling means for coupling the synchronous machine to a prime mover. Control means are provided to control the system such that the system is selectively operable in two modes. In the first mode, the synchronous machine is coupled to the prime mover and acts as a synchronous generator to supply power to the grid. In the second mode the synchronous machine is decoupled from the prime mover and acts as a synchronous condenser. This can allow parameters of the grid, such as power factor and voltage, to be adjusted.04-16-2009
20080309085WIND POWERED GLOBAL POSITIONING TRACKING DEVICE - A wind powered global positioning tracking device, which is disposed on a vehicle, and includes a wind driven generator, a power regulating circuit, a central processing unit, a charging circuit, a rechargeable battery, a general packet radio service module and a global positioning system receiver module. When in use, the power regulating circuit converts electricity generated by the wind driven generator to provide electric energy to the central processing unit, the general packet radio service module and the global positioning system receiver module. Furthermore, the electric energy is input into the charging circuit to charge the rechargeable battery. Accordingly, when there is no wind for the wind driven generator to generate electricity, the charging circuit can be placed in an electric discharge state controlled by the central processing unit, thereby enabling the rechargeable battery to continue supplying electric energy, thus ensuring normal operation of the global positioning tracking device.12-18-2008
20080203731Eolic converter - The present invention relates to an eolic converter endowed with a winds keeping system that allows an utilization of above 97% of the wind force to transform in mechanical rotational energy, at the same time that is added to this high efficiency the possibility to add several levels of plates without limit of size of the referred plates, what provides for an unique propeller shaft the use of gigantic areas of reception of the wind force where these shafts can be added in order to allow a great area of wind reception to rotate a shaft, even with low values of wind speed, this system doesn't need to be oriented for the wind direction, because traction independently of the moment wind direction, always rotating in the same direction that it was programmed to rotate.08-28-2008
20100140939METHOD AND APPARATUS FOR CONTROLLING A WIND TURBINE - A power system for a wind turbine having a measurement device configured to detect an overfrequency condition within an electrical system and a controller communicatively coupled to the measurement device. The controller is configured to switch the wind turbine between a power generation mode and a power consumption mode based on an existence of a detected overfrequency condition.06-10-2010
20100140936WIND TURBINE WITH GPS LOAD CONTROL - A wind turbine includes at least one global positioning sensor for determining a deflection of a component of the wind turbine.06-10-2010
20090309361METHOD FOR CONTROLLING A WIND ENERGY PARK - The present invention is related to a method for controlling a wind energy park with plural wind energy plants and plural control units, which perform control tasks in the wind energy park, comprising the following steps: 12-17-2009
20110006524WIND TURBINE WITH STABLE POWER OUTPUT - A wind turbine includes a plurality of superposed rotor assemblies each comprising a top first rotor, a plurality of second rotors, and an electric motor; a manifold having one ends each being in fluid communication with the bottommost second rotor; a rotor and generator assembly having one end being in fluid communication with the other end of the manifold, the rotor and generator assembly comprising a plurality of units each including a main rotor having a first valve, a bypass pipe interconnecting both ends thereof, the bypass pipe having a second valve at a forward joining portion thereof and the main rotor, and a first generator driven by the main rotor; and a feedback pipe having one end connected to the other end of the rotor and generator assembly and the other ends connected to the first rotors respectively.01-13-2011
20110006528METHOD FOR OPERATING A WIND TURBINE - A method for operating a wind turbine that includes a generator device for outputting electric energy to a network, the generator device having a stator, and a controller device for controlling the generator device. To ensure sufficient protection of the wind turbine even during network fluctuations, a network voltage is determined using a network model at least as a function of a stator voltage measured with a first measuring apparatus and a network power measured with a second measuring apparatus, and the determined network voltage and a predeterminable maximum phase angle present between the stator voltage and network voltage are used to determine the maximum effective power of the wind turbine that can be output, and the output effective power is regulated as a function of the determined maximum effective power that can be output and a target effective power predetermined by the control device.01-13-2011
20110006525Method for Operating a Wind Farm Comprising a Plurality of Wind Turbines - A method and a device for operating a wind farm with a plurality of wind turbines are provided. According to the method, operating parameters of the wind turbines of the wind farm are adjusted according to an optimization goal, the optimization goal being the maximum value of the total output of the wind farm produced from the sum of all individual outputs of the wind turbines. The optimization goal differs from conventional optimization goals where the respective individual outputs of the wind turbines are optimized without taking the overall output into consideration.01-13-2011
20130119660WIND-POWER GENERATION SYSTEM AND CONTROL METHOD FOR THE SAME - An object is to reduce a decrease in the amount of electric power supplied due to the occurrence of a gust of wind during an output-power limiting operation. Provided is a wind-power generation system in which, in the case where an output-power limiting operation for decreasing the grid frequency is performed, when at least one wind turbine is disconnected depending on the wind conditions, the output power of the other wind turbines in operation is increased.05-16-2013
20130119661Horizontal Axis Radial Wind Turbine - A wind turbine and housing combination may include a horizontal axis radial wind turbine and a housing surrounding the turbine, the housing being incorporated with a cupola or gable roof of a building. The turbine may include an axle, a plurality of blade sections extending radially from the axle, and a generator operatively coupled to a first end of the axle. Each blade section may include a curved drag surface that provides a stall surface normal to the direction of an anticipated wind flow. The generator may be adapted to produce electricity when the axle is rotated. The housing may include a plurality of louvers and a motor operatively coupled to the plurality of louvers. Each louver may be capable of having (i) a closed position that prevents wind from entering the housing and (ii) an open position that permits wind to enter the housing. The housing may be adapted to be attached to an apex of a gable roof of a building.05-16-2013
20100140941CONTROL OF THE ROTATIONAL SPEED OF A WIND TURBINE WHICH IS IMPEDED TO EXPORT ELECTRICAL POWER TO AN ELECTRICITY NETWORK - A rotational speed controlling device for a wind turbine is provided. The controlling device includes a first input node for receiving a first signal, indicative of an actual rotational speed of the rotor, a second input node for receiving a second signal, indicative of a reference rotational speed for the rotor, a detection unit for detecting a defective operational state in which the wind turbine is impeded to export electrical power to an electricity network, a control unit for providing a reference signal for a characteristic operational parameter of the wind turbine based on the first signal and the second signal, and a pulse generator adapted to send a kick pulse to an integral control element of the control unit in response to the detection of the defective operational state. The characteristic operational parameter is indicative of the rotational speed of the rotor.06-10-2010
20110204629Shadow Control of Wind Turbines - A rotor of a wind turbine may cast an intermittent shadow onto an object in the vicinity of the turbine. A shadow-control system stops the wind turbine, based on a shadow-related shut-down condition. The condition is based on a result of a comparison between a direct-light intensity and an indirect-light intensity being beyond a direct-to-indirect light threshold. A set of light sensors measures the direct- and indirect-light intensities. A sensor measures the direct light intensity when irradiated by the sun, and the indirect-light intensity when not irradiated by the sun. The set of light sensors to provide the measured direct- and indirect-light intensities for the comparison consists of two sensors, an eastward-oriented sensor and a westward-oriented sensor.08-25-2011
20130214536WIND-TURBINE-GENERATOR CONTROL SYSTEM, WIND TURBINE GENERATOR, AND WIND-TURBINE-GENERATOR CONTROL METHOD - A power-converter controller is provided in a wind turbine generator which is interconnected to a utility grid and in which a generator generates electrical power by rotation of a rotor having blades. The power-converter controller includes a voltage sensor that measures a generator terminal voltage, resonance-component extracting sections that extract an electrical resonance component generated due to the interconnection from a measurement result measured by the voltage sensor, and a control section and a control section that control a current that flows to the utility grid so as to suppress the resonance component, on the basis of the resonance component extracted by the resonance-component extracting sections. Accordingly, the power-converter controller can more effectively suppress the resonance generated due to the interconnection of the wind turbine generator to the utility grid.08-22-2013
20110221196METHOD AND APPARATUS FOR WIND ENERGY SYSTEM - The description relates to generating power using wind energy. The current disclosure provides an opportunity to develop a new energy generating resource. According to some aspects, the apparatus uses a passive device to capture wind, and accelerate the wind toward a turbine and other fan or turbine blades to generate power in a confined structure. The foot print of the current design is scalable to individual users or businesses such as homes, industrial facilities, small business sites, as well as small power utilities such as wind farms. The passive devices to capture wind can have active electronic or mechanical controls to control the amount of wind flowing in the structure to generate power.09-15-2011
20090134624EMERGENCY PITCH DRIVE UNIT FOR A WIND TURBINE - An emergency pitch drive unit for a wind turbine comprises: an electrical motor arranged for adjusting the pitch angle of a wind turbine rotor blade; an emergency power supply unit for supplying electrical power to the motor; and a controller configured for controlling, in the event of a power failure. The motor to adjust the pitch angle uses the electrical power from the emergency power supply unit. The emergency power supply unit comprises a fuel cell.05-28-2009
20090184519SPEED CONTROLLED PITCH SYSTEM - The present patent application concerns wind turbine having a rotor with a first rotor blade and a pitch control system with a first drive system for adjusting a pitch angle of the first rotor blade, wherein the drive system is adapted to transform rotational energy of the rotor blade rotating about its longitudinal axis into another form of energy such that a counter torque against the rotating direction is induced. Further, it concerns a method for controlling a pitch velocity of a rotor blade of a wind turbine, the wind turbine comprising at least one drive system for adjusting a pitch angle of said rotor blade, the drive system being adapted to operate in a active mode, wherein the drive system rotates the rotor blade, and in a passive mode, wherein the drive system exerts a counter force against the rotating direction, when the rotor blade being rotated by another force than the force of the drive system, wherein the pitch velocity is controlled by operating the drive system in said passive mode when the pitch of the rotor blade is changed from a first position to a second position. Finally, the present patent application concerns a controller for controlling a pitch angle of at least one rotor blade of a wind turbine, the controller being adapted to control a first drive system for adjusting the pitch angle of a first rotor blade, wherein the first drive system can be operated in an active mode in which the drive system rotates the rotor blade about its longitudinal axis, and in a passive mode in which a rotation of the rotor blade about its longitudinal drives the drive motor such that the drive system transforms the rotational energy in another form of energy.07-23-2009
20120139247WIND POWER PLANT HAVING AN ADJUSTABLE POWER RESERVE - A wind power plant, including a generator driven by a rotor in order to generate electrical power and a controller that includes a pitch module for adjusting a pitch angle of blades of the rotor. The controller has an input for a required power reserve and determines a target pitch angle depending on an operating point of the wind power plant. A secondary pitch controller is also provided, which includes a detector for available power and a dynamic offset module. Input signals for the available reserve power determined by the detector, the required reserve power and the generated electrical power are applied to the dynamic offset module, which is designed to determine a value for a pitch angle offset. An activation element varies the target pitch angle by the pitch angle offset.06-07-2012
20120139244METHOD AND SYSTEM FOR CONTROL OF WIND TURBINES - A method of controlling at least one wind turbine, comprising selecting a first effective operational curve from a plurality of operational curves, and applying the first effective operational curve to control at least one wind turbine. The operational curves may be operational curve segments.06-07-2012
20120068463Wind Turbine Apparatus, Systems and Methods - A wind turbine is disclosed. The wind turbine includes comprising an inflatable portion comprising one or more blades and a device for rotatably driving the inflatable portion at a predetermined rate for a predetermined time.03-22-2012
20120068462Method of and device for determining a common blade frequency of a rotor of a wind turbine, and method of operating a wind turbine - A method of determining a common blade frequency of a rotor of a wind turbine is provided. The method includes measuring a vibration quantity representative of a vibration of a component of the wind turbine, and determining the common blade frequency based the measured vibration quantity.03-22-2012
20120068461Wind Energy System - The invention relates to a wind energy system having a support (03-22-2012
20120068460CONVERTIBLE BEARING FOR A WIND TURBINE AND METHOD FOR OPERATING SAME - A bearing assembly for a wind turbine includes a bearing housing and a bearing surface defining a passageway configured to receive a shaft. The bearing surface includes a stationary portion and a movable portion, the movable portion being defined by a movable member coupled to the bearing housing. The movable member is movable between a first position, wherein the movable portion is flush with the stationary portion such that the bearing surface is smooth, and a second position wherein the movable portion is spaced from the stationary portion to define a fluid cavity in the bearing surface. A method of operating a plain bearing assembly includes operating the plain bearing assembly as a hydrostatic plain bearing during low dynamic conditions and operating the plain bearing assembly as a hydrodynamic plain bearing during high dynamic conditions.03-22-2012
20120104759Multi Directional Augmenter and Diffuser - This invention relates to an augmenter system for the increase of power generation primarily used for utilizing wind energy. The augmenter system includes an augmenter having a plurality of walls, such as flexible walls, connected to each other with supporting horizontal elongated members. The augmenter is used in conjunction with a blade system and an air flow regulation or furling system to achieve optimal power output. The augmenter includes a relatively lightweight, low cost flexible wall structure to enhance an air flow into impact impellers associated with the blade system. In one arrangement, the blade system defines a swept area with a height to diameter ratio of greater than four. In one arrangement, the blade system defines a swept area with a height to diameter ratio of greater than ten.05-03-2012
20120104758METHOD FOR AUTOMATICALLY STARTING A WIND TURBINE AND A WIND TURBINE FOR CARRYING OUT THE METHOD - A method automatically starts a wind turbine after an outage of an electrical supply grid. In the method, at least one measurement value is acquired as to a climatic variable in the wind turbine during the outage of the electrical supply grid. At least one acquired measurement value is recorded and a warning signal is generated prior to a starting of the wind turbine when the at least one recorded measurement value exceeds a predetermined maximum value or drops below a predetermined minimum value.05-03-2012
20120104757WIND TURBINE HAVING AN ACTIVE PITCH ANGLE CONTROL DURING AN IDLING SITUATION - Wind turbine comprising: a tower (13) and a nacelle (21) housing a generator (19) driven by a wind rotor; measuring devices of at least wind speed V, generator speed Ω, pitch angle θi of each blade, power P, wind turbine accelerations in two perpendicular directions Ax, Ay, yaw angle Yw; azimuth position of the wind rotor AZ in which the control system connected to said measuring devices and to at least pitch and torque control actuators is also arranged for performing an active pitch angle regulation when the wind turbine is in an idling situation above V05-03-2012
20120104756METHOD FOR OPERATING A WIND TURBINE - The invention concerns a method of operating a wind power installation. The wind power installation has a circuit for measuring the frequency prevailing in the electrical supply network connected to a control device for controlling operation of the wind power installation. It is proposed that the power delivered by the generator of the wind power installation to the network is increased quickly and for a short period above the currently prevailing power of the wind power installation if the network frequency of the electrical network is below the desired target frequency of the network by a predetermined frequency value.05-03-2012
20120104754WIND TURBINE WITH LVRT CAPABILITIES - Systems and methods (“utility”) for providing Low Voltage Ride Through (LVRT) capabilities for wind turbines are disclosed. The utility includes a directly connected synchronous generator (05-03-2012
20120104753CONTROL SYSTEM OF WIND POWER GENERATOR, WIND FARM, AND METHOD FOR CONTROLLING WIND POWER GENERATOR - A wind power generator generates power through a rotation of a rotor and is interconnected, and operated with its power generation output previously limited in order to be able to further supply the power to a power system in response to a decrease in system frequency. Thus, a concentrated control system derives a required restricted amount corresponding to a power generation output required to respond to the decrease in system frequency, derives a value by subtracting an amount corresponding to a latent power generation output with which the power generation output can be increased, from the required restricted amount, and sets a restricted amount of the power generation output in each wind power generator to perform the operation with the power generation output previously limited to respond to the decrease in system frequency, based on the above value.05-03-2012
20120104752WIND TURBINE GENERATOR AND TIDAL CURRENT GENERATOR AND OPERATION METHOD THEREOF - An object of the invention is to provide a wind turbine generator or a tidal current generator which is equipped with a hydraulic transmission and achieves a superior power generation efficiency, and a operation method thereof. The wind turbine generator 05-03-2012
20090322087Wind Turbine Generator System - To shorten a startup interval to reach a synchronizing condition, a phase difference and an amplitude difference between the grid voltage and the stator voltage of one phase of a winding are obtained. The difference in amplitude is decreased prior to or in parallel to synchronizing the stator voltage with the grid voltage. The calculated compensation phase compensation value is used as an initial value for synchronizing at the next synchronizing operation.12-31-2009
20090322083OPTIMIZING CONVERTER PROTECTION FOR WIND TURBINE GENERATORS - An integrated fault and personnel protection system and method for a multi-thread converter in a wind turbine power system is provided. The structure and method provide for system optimization, as well as, arc flash protection. Fault sensing with means of removing power applied to the converter minimizes the energy available to produce an arc flash event. Sensing and disconnects devices for the protections are provided close to the source of energy to protect more of the system. Converter controls detect, identify and isolate faults selecting the best combinations of the novel specific fault isolation devices. Components are distributed into separate physical to enhance protection.12-31-2009
20110221194Rotational Speed Control of a Wind Turbine Based on Rotor Acceleration - It is described a method for controlling the rotational speed of a rotor of a wind turbine in particular at high wind speeds. The described method comprises (a) determining a rotor acceleration value, wherein the rotor acceleration value is caused by a temporal change of the rotational speed of the rotor, and (b) controlling the rotational speed of the rotor as a function of the rotor acceleration value. It is further described a control system for controlling the rotational speed of a rotor of a wind turbine, a wind turbine being equipped with such a control system and to a computer program, which is adapted for controlling and/or for carrying out the mentioned rotational speed control method.09-15-2011
20090243295SYSTEM AND METHOD FOR REDUCING ROTOR LOADS IN A WIND TURBINE UPON DETECTION OF BLADE-PITCH FAILURE AND LOSS OF COUNTER-TORQUE - A system and method for reducing rotor loads in a wind turbine that includes a brake and one or more rotor blades coupled to a rotor. Upon detection of a loss of counter torque and a blade-pitch failure in at least one rotor blade, a processor reduces a generator overspeed threshold value by a predetermined amount and determines a brake-release threshold value. The brake is applied to slow the rotor if the generator/rotor speed exceeds the reduced generator/rotor overspeed threshold value. In addition, the brake is applied to slow the rotor until the generator/rotor speed is below the brake-release threshold value. The rate of change of the pitch angle of the rotor blade may be varied as the blade moves toward feather in response to the detected blade-pitch failure.10-01-2009
20110140427SYSTEM, DEVICE, AND METHOD FOR AUTOMATED MONITORING AND OPERATION OF WIND TURBINES - A method for use in operating one or more wind turbines is provided. An exception condition and, optionally, one or more parameters are received from a wind turbine controller. A correction is determined based at least in part on the exception condition and/or the parameters. The correction is applied, facilitating resolution of the exception condition. The method may be practiced for multiple wind turbine controllers, such as the wind turbine controllers within a site or the wind turbine controllers within multiple sites.06-16-2011
20110140420METHODS AND SYSTEMS FOR OPERATING A WIND TURBINE - A method for controlling operation of a floating wind turbine is described. The floating wind turbine includes a wind turbine generator coupled to a support tower. The method includes measuring a tower inclination, determining an operating parameter control value based on at least the measured tower inclination, and adjusting wind turbine operation based at least partially on the operating parameter control value.06-16-2011
20090102197Horizontal-axis wind generator - A horizontal-axis wind generator comprising a platform rotating according to a vertical axis. The generator incorporates a support structure for supporting a horizontal shaft of a wind turbine which moves an electric generator and which is formed by several blades which are located facing the wind when the base platform rotates by an electronic control device connected to a wind vane for determining the suitable orientation. The wind turbine, in the direction of entrance or attack of the wind to its blades, respective solar plates or panels. A lower plate or panel is inclined in a slope closing the lower area of the turbine and another lowerable upper plate or panel is located in a horizontal or downwardly inclined upwardly open position, closing the air inlet to the turbine depending on the wind conditions.04-23-2009
20090102195Wind Farm Capable of Staggered Disconnection - The invention relates to a method of operating a wind farm intended for connection to an electric power network, which wind farm includes at least two wind turbine generator systems (WEA04-23-2009
20090102194Electrical-Energy Generator - Electrical-energy generator of the type that incorporate a plinth or pedestal from which emerges a vertical, fixed shaft on which is mounted, via bearings, a second shaft to which a blade of conical, helicoidal shape is secured, which imparts a rotary movement to the movable shaft through the effect of the wind, characterized in that said fixed shaft is tubular and incorporates within it an electrical winding functioning as stator, whilst the movable shaft, which is also tubular, incorporates within it a plurality of permanent magnets that convert it into a rotor, all the aforesaid in such a manner that the actual shaft of the generator simultaneously constitutes the dynamo or the alternator that converts the mechanical energy into electrical energy.04-23-2009
20090085354SYSTEM AND METHOD FOR CONTROLLING TORQUE RIPPLES IN SYNCHRONOUS MACHINES - A system for controlling torque ripple in a permanent magnet synchronous machine includes a power converter configured to be coupled to the permanent magnet synchronous machine and to receive converter control signals and a system controller coupled to the power converter. The system controller includes a fundamental current controller configured for providing fundamental voltage commands, a harmonic current controller configured for using harmonic current commands, current feedback signals from the permanent magnet machine, and fundamental current commands in combination with positive and negative sequence regulators to obtain harmonic voltage commands, and summation elements configured for adding the fundamental voltage commands and the harmonic voltage commands to obtain the converter control signals.04-02-2009
20090212563SYSTEM AND METHOD FOR IMPROVING PERFORMANCE OF POWER CONSTRAINED WIND POWER PLANT - A wind turbine power generating system includes at least one wind-driven rotor for transforming wind energy into rotational motion. A plurality of turbine generators is connected to one or more wind-driven rotors. An active power curtailment controller is also provided. The active power curtailment controller is configured to curtail an actual power output of the plurality of turbine generators at a predetermined maximum output power level, the predetermined output maximum output power level being less than an aggregate nominal power rating of the plurality of turbine generators.08-27-2009
20110140431WIND TURBINE FARM AND METHOD OF CONTROLLING AT LEAST ONE WIND TURBINE - A method of controlling a wind turbine that includes at least one rotor shaft and at least one blade operatively coupled to the rotor shaft includes measuring a first wind turbine operational condition that is representative of a blade deflection value and generating a first operational condition signal based on that first wind turbine operational condition. The wind turbine also includes a drive train including at least one rotor shaft and an electric generator. The method also includes measuring at least one second wind turbine operational condition and generating at least one second operational condition signal. The method further includes changing the blade deflection value by changing the second operational condition.06-16-2011
20110140432CONTROL METHOD AND SYSTEM FOR A WIND POWER INSTALLATION IN CASE OF GRID FAULTS - The present invention relates to a method and system for controlling a wind power installation connected to an electrical power grid, in case of a fault in said grid.06-16-2011
20110140429SYSTEMS FOR CONTACTLESS POWER TRANSFER - A system includes a first coil mechanically coupled to a first component and electrically coupled to a power source. The system further includes a second coil mechanically coupled to a second component and configured to receive power from the first coil via a magnetic field. At least one of the first and second components includes a rotatable component. The system also includes a field focusing element disposed between the first coil and the second coil and configured as a self resonant coil having a standing wave current distribution to focus the magnetic field onto the second coil and enhance the coupling between the first coil and the second coil.06-16-2011
20110140428MONITORING AND CONTROL APPARATUS AND METHOD AND WIND POWER PLANT EQUIPPED WITH THE SAME - It is an object to reduce influence on a utility grid by reducing a rapid change in active power, and to extend the life of a wind power plant while controlling active power output in response to a request from the utility grid. A monitoring and control apparatus applied to a wind power plant including a plurality of wind turbine generators includes an electric power control unit that controls the wind turbine generators so as to reduce output of the wind power plant in a stepwise manner, when an active power reduction request from a utility grid side is output.06-16-2011
20110140426WIND TURBINE HAVING VARIABLE HEIGHT AND METHOD FOR OPERATING THE SAME - A wind turbine includes a rotor having a hub and at least one rotor blade, wherein the operating height of the hub is adjustable. Further, a method for operating a wind turbine is provided, which includes varying the height of the wind turbine.06-16-2011
20110140425Method and System For Controlling Wind Turbine Rotational Speed - A wind turbine includes a drive train and a brake configured to reduce a rotational speed of the drive train. The wind turbine also includes a brake control system operatively coupled to the brake. The brake control system is configured to selectively operate the brake based on an oscillational characteristic of at least one component of the wind turbine.06-16-2011
20110140423WIND TURBINE AND METHOD FOR OPERATING A WIND TURBINE - The present disclosure relates to a method for operating a wind turbine, the wind turbine comprising a wind rotor having at least one rotor blade and a generator connected to the wind rotor, wherein the generator is adapted to be connected to a grid, wherein the method comprises: adjusting at least one wind turbine parameter to increase the rotational speed of the wind rotor; increasing the rotational speed of the wind rotor; during increasing of the rotational speed of the wind rotor determining if the wind turbine would exceed a predetermined amount of energy to be fed into the grid at the actual wind rotor rotational speed; and during increasing of the rotational speed of the wind rotor connecting the wind turbine to the grid if determining that the wind turbine would exceed the predetermined amount of energy to be fed into the grid. Further, the present disclosure relates to a wind turbine comprising a wind rotor, wherein the wind rotor is mechanically connected to a generator for transmitting the rotational power of the wind rotor having at least one rotor blade to the rotor of the generator, wherein the output current of the generator is adapted to be selectively connected to a grid by a circuit breaker, the wind turbine further comprising a control device adapted to close or to trip the circuit breaker, wherein the control device is adapted to perform the method disclosed herein.06-16-2011
20090200803WIND POWER GENERATION SYSTEM - In a wind power generation system, an AC input of a unit for coping with system faults is connected to an excitation converter and a DC port of the unit for coping with system faults is connected to a DC port of a converter through resistors. A plurality of energy consumptive circuits each constructed of a resistor and switching units are provided for the DC port of the unit for coping with system faults.08-13-2009
20110140422METHOD FOR CONTROLLING A PROXIMITY SENSOR OF A WIND TURBINE - The present disclosure relates to a method for controlling at least one proximity sensor of a wind turbine, the wind turbine comprising a rotor shaft, the at least one proximity sensor being adapted to measure a radial displacement of the rotor shaft; the method includes: providing at least one reference value, detecting an output of the at least one proximity sensor, the output depending on a measured distance by the respective proximity sensor; comparing the detected output of the proximity sensor with at least one reference value. Further, the present relates to a control arrangement for a wind turbine, the wind turbine comprising a wind rotor shaft; wherein the control arrangement comprises at least one proximity sensor being adapted to measure a radial displacement of the rotor shaft, wherein the at least one proximity sensor is adapted to generate an output signal depending on a measured distance by the respective proximity sensor; wherein the control arrangement further comprises a control device, the control device being adapted to receive the output signal of the at least one proximity sensor, wherein the control device is adapted to compare the output signal with at least one reference value. Finally, the present disclosure relates to a wind turbine comprising a control arrangement.06-16-2011
20090001724METHOD AND APPARATUS FOR CONTROLLING VERTICAL AXIS WIND POWER GENERATION SYSTEM - Provided are an apparatus and method for controlling a vertical axis wind power generation system that controls the rotation of guide vanes according to wind direction and speed, appropriately controls a direction of wind passing over an impeller, thereby maintaining a rotational speed generating the maximum power, maintains output power of a generator as rated power according to wind direction and speed, and stops the generator when a low or high wind speed outside a setting value range, an error in a structure, a fault in a braking unit, and/or a fault in guide vanes is detected.01-01-2009
20090212564Method and apparatus for assembling electrical machines - A method of assembling an electrical machine includes programming at least one processor with a stator flux vector estimation scheme. The electrical machine has a stator at least partially extending around a rotor. The electrical machine is electrically coupled to an electric power system. The electric power system transmits at least one phase of electric power to and from the electrical machine with at least partial power conversion. The stator flux vector estimation scheme is programmed to generate at least one stator back-electromagnetic force (back-EMF) signal and to generate at least one stator flux vector signal using the at least one stator back-EMF signal. The at least one stator flux vector signal at least partially represents an estimated rotor position. The method also includes coupling at least one output device in data communication with the at least one processor.08-27-2009
20090250932Method of damping tower vibrations of a wind turbine and control system for wind turbines - A control system for a wind turbine is provided. A pitch-control unit establishes a pitch-reference signal representing a pitch to be set by the pitch-actuator system. A rotor-speed input receives a signal representing a speed of the rotor. A speed-reference input receives a speed-reference signal for the rotor speed. An inclination-signal input receives a signal representing a tower inclination. A pitch-reference output outputs the pitch reference signal. A modification unit is connected to the speed-reference input to receive the speed-reference signal and connected to the inclination-signal input to receive the inclination signal. The modification unit establishes a modification signal based on the inclination signal, to modify the speed-reference signal via the modification signal, and to output a modified-speed-reference signal. The pitch-control unit connected to the modification unit to receive the modified-speed-reference signal and establish the pitch-reference value at least based on the difference between the modified-speed-reference and the rotor-speed signals.10-08-2009
20080315586Generator output circuitry for twin turbine wind power generating system - Improved generator output circuitry for twin turbine includes boost DC converters for each of a pair of generators with their output introduced to a single inverter, which serves both generators and converters in common. The inverter output then proceeds in conventional AC form through a disconnect switch to a power grid.12-25-2008
20090200804Method For Damping Tower Oscillations, An Active Stall Controlled Wind Turbine And Use Hereof - The invention relates to a method for damping tower oscillations in the tower of an active stall controlled wind turbine. The method comprises the steps of operating two or more blades of the wind turbine in a stall condition, detecting if the tower oscillates beyond a predefined level, and establishing different stall conditions between at least two of the blades, wherein the different stall conditions are established by offsetting the pitch angle of at least a first blade in relation to the pitch angle of one further blade. The invention further relates to an active stall controlled wind turbine and use hereof.08-13-2009
20100038909Method Of Operating A Wind Turbine With Pitch Control, A Wind Turbine And A Cluster Of Wind Turbines - A method of operating a pitch controlled wind turbine connected to the utility grid in response to an increase in wind velocity to above a predefined value. The method includes the sequential steps of: reducing the generated power, allowing an intermediate increase in the generator speed, and reducing the generator speed by pitching the wind turbine rotor blades. A wind turbine and a cluster of wind turbines is also contemplated.02-18-2010
20100148505CONTACT-LESS POWER AND SIGNAL TRANSMISSION DEVICE FOR A HIGH POWER LEVEL TRANSFORMER - A transformer is provided comprising a first member upon which a first circuit is wound; a second member upon which a second circuit is wound such that power is transferred to the second circuit in a contact-less manner; and a signal transmitter on the first member in close proximity to an appropriate receiver on the second member together with a signal transmitter on the second member in close proximity to an appropriate receiver on the first member such that said transmitters and receivers exchange signals in a contact-less manner, whereby the circuits are embedded in a high thermal conductivity resin. An exemplary embodiment of the invented transformer is one where the second member rotates relative to the first member.06-17-2010
20100181769MOTOR LOAD REDUCTION IN A WIND POWER PLANT - A wind power plant is characterized in that a measurement device (07-22-2010
20120193917PITCH CONTROL SYSTEM AND METHOD FOR WIND TURBINE - The invention discloses a pitch control system for a wind turbine and a method, comprising a main controller, a secondary controller, a motor and a pitch gearbox, wherein the main controller is connected with a plurality of the secondary controllers through a communication bus; each blade corresponds to one controller and at least two motors, and one pitch gearbox is driven by each motor. The main controller is used for calculating a pitch expected value according to wind speed as well as power and rotation speed of a generator; and the motor is driven by the secondary controller according to the pitch expected value, so as to drive the pitch gearbox and hence drive the blades to vary a pitch angle.08-02-2012
20120193916WIND TURBINE GENERATOR AS WELL AS PARAMETER ACQUISITION SYSTEM AND METHOD THEREOF - The present invention discloses a wind turbine generator as well as a parameter acquisition system and a method thereof. The acquiring system comprises: at least one sensor, arranged in the hub of the wind turbine generator and configured to acquire environment operation parameters of the hub, and a data processing module, comprising a parameter acquisition unit, a parameter reading unit and a storage unit, wherein the parameter acquisition unit is connected with each sensor and configured to obtain environment operation parameters acquired by the each sensor; the parameter reading unit is connected with pitch drivers in the wind turbine generator and configured to read load characteristic parameters of the pitch drivers; the storage unit is connected with the parameter acquisition unit and the parameter reading unit and configured to store the environment operation parameters and load characteristic parameters.08-02-2012
20110140424METHOD FOR OPERATING A WIND TURBINE, METHOD FOR DETERMINING THE TEMPERATURE OF A PERMANENT MAGNET AND CONTROLLER FOR A WIND TURBINE - The disclosure concerns a method for operating a wind turbine having an electrical system, the electrical system comprises a permanent magnet generator having a rotor and a stator, and a power electronic device electrically connected to the permanent magnet generator, wherein the power electronic device and a circuit breaker are electrically disposed in series between the permanent magnet generator and a grid, wherein the permanent magnet generator has permanent magnets and a generator winding into which a voltage is induced by the permanent magnets when the rotor is rotating, the method comprising: generating a signal for tripping the circuit breaker based on a field modification that is modifying the field of the permanent magnets of the permanent magnet generator. Further, the disclosure concerns a method for determining the temperature of at least one permanent magnet of a permanent magnet machine and a controller for a wind turbine.06-16-2011
20110140433METHOD OF CONTROLLING A VARIABLE SPEED WIND TURBINE - in a method of controlling a variable speed wind turbine, said wind turbine comprising a double-fed asynchronous generator having rotor windings and stator windings and means for controlling the wind turbine speed, the method comprises the following steps:—measuring or calculating, based on measured parameters, the active electrical power (P06-16-2011
20100148507METHOD FOR CONTROLLING THE OPERATION OF A WIND TURBINE AND A WIND TURBINE - A method for controlling the operation of a wind turbine includes determining a first measure of a mechanical input of a component of the wind turbine, and concurrently, determining a second measure of a mechanical output of the component, determining an operating frequency response function of the component from an analysis of the relation between the first measure and the second measure, comparing the operating frequency response function with a predetermined operating frequency response function and determining a possible deviation between the two, and controlling the operation of the wind turbine so as to alter the mechanical input to the component in response to the deviation. A wind turbine that implements such a method is also disclosed.06-17-2010
20100148506ROTOR BLADE ADJUSTMENT DEVICE FOR A WIND TURBINE - A wind turbine includes a rotor having adjustable rotor blades for driving a generator and an adjusting device for the rotor blades provided with an actuator that comprises at least an excitation winding. The adjusting device includes a torque-reducing device that automatically reduces drag torque of the actuator. The torque-reducing device includes a current divider that switches the current through the excitation winding in such a manner that the current flows completely through the excitation coil when the motor is in operation and the current only partly flows through the excitation coil when coasting (slip operation). As a result, when coasting, the magnetization of the excitation winding is reduced about the adjusting device, whereby the increase of the speed torque characteristic curve can be determined, thus improving the ratio of the adjusting device when coasting.06-17-2010
20100156102ELECTRIC GENERATION SYSTEM INCLUDING MULTIPLE MOTOR/GENERATORS - An electric generating system including a frame configured to couple to a tether system and at least one power generation module mounted to the frame. The at least one power generation module includes a holding structure attached to the frame, a rotating structure, including a rotor shaft, configured to rotate relative to the holding structure, a rotor attached to the rotor shaft, and a plurality of motor/generators attached to the holding structure, each including a drive shaft configured to engage with the rotor shaft. The electric generating system is configured to operate in a first mode wherein the motor/generators are configured to receive electrical energy from the tether system and drive the drive shafts to create a torque on the rotor shaft to thereby rotate the rotor and create lift to fly the electric generating system to an operating position within an air stream, and to operate in a second mode wherein the rotor is configured to be rotated by the air stream to provide lift to maintain the electric generating system within the air stream and to create a torque on the rotor shaft to thereby rotate the rotor shaft and the rotating structure so that the torque from the rotor is transmitted to the motor/generators via the drive shafts to generate electrical energy which is provided to the tether system.06-24-2010
20100187820WIND TURBINE GENERATOR, ACTIVE DAMPING METHOD THEREOF, AND WINDMILL TOWER - A wind turbine generator, an active damping method thereof, and a windmill tower in which vibrations of the wind turbine generator itself or the windmill tower can be reduced at low cost are provided. The acceleration due to vibrations of a nacelle is detected with an accelerometer attached to the nacelle. In an active damping unit, a pitch angle of windmill blades for generating a thrust on the windmill blades so as to cancel out the vibrations of the nacelle is calculated on the basis of the acceleration, and the pitch angle is output as a blade-pitch-angle command δθ* for damping. On the other hand, in a pitch-angle control unit, a pitch angle of the windmill blades for controlling the output to be a predetermined value is calculated, and the pitch angle is output as a blade-pitch-angle command θ* for output control. The blade-pitch-angle command δθ* for damping is combined with the blade-pitch-angle command θ* for output control using a subtracter. The pitch angle of the windmill blades is controlled on the basis of the resulting blade-pitch-angle command after combining.07-29-2010
20090079195WIND POWER GENERATOR - When a wind velocity sensor detects a wind velocity higher than a predetermined level, a timer device starts a waiting timer function during an operation timer period shorter than the waiting timer period. After the waiting timer period is over, the waiting timer function is switched to an operation timer function, and a switching relay switches a generator to a motor only during an operation timer period. Then, a driving circuit performs a start assisting rotation. After the operation timer period is over, the waiting timer period re-starts. This process is repeated. When during this period, the number of rotations of a rotor monitored by a rotation number measuring device, based on the output voltage V03-26-2009
20090079194SYSTEM FOR OPERATING A GENERTOR AS A MOTOR IN A TURBINE WIND POWER GENERATING SYSTEM - SYSTEM FOR OPERATING A GENERATOR AS A MOTOR IN A TURBINE WIND POWER GENERATING SYSTEM includes a controller and Four Quadrant or Regenerative Drive Circuitry which alternatively operates one or more generators as motors.03-26-2009
20090079193METHOD OF CONTROLLING A WIND TURBINE CONNECTED TO AN ELECTRIC UTILITY GRID - The invention relates to a method of controlling a wind turbine connected to an electric utility grid during malfunction in said electric utility grid (03-26-2009
20090079192Method for controlling and adjusting a wind turbine - A method for controlling and adjusting a wind power installation having a nacelle displaceable by an azimuth angle, at least one rotor blade displaceable about its longitudinal axis and a power supply in a spinning mode, wherein the method comprises the following steps: a control unit determines an angular position for the nacelle from measured values (v) of wind velocity and wind direction and one or more displacement angles for the at least one rotor blade upon a measured wind velocity exceeding a predetermined speed value (v03-26-2009
20100187819 LARGE SIZED SAFE WINDMILL WITH HIGH EFFICIENCY - A large sized safe windmill with high efficiency is made up of plural vane-assemblies. Each assembly includes an axle center (07-29-2010
20130214534METHOD FOR OPERATING WIND FARM AND OPERATION CONTROL SYSTEM FOR WIND FARM - An operation control system for a wind farm having wind turbines includes: a remaining-lifetime estimation unit for estimating remaining lifetime of a component of each wind turbine; a sales-income estimation unit for estimating, for each wind turbine, an income from sales of electric power under a plurality of output control conditions; a maintenance-cost estimation unit for estimating, for each wind turbine, maintenance cost based on the remaining lifetime of the component under each of the plurality of power limit conditions; a power-limit-condition selection unit for selecting, for each wind turbine, a power limit condition that maximizes income obtained from the wind farm, based on the income from sales of electric power and the maintenance cost estimated for each wind turbine under each of the power limit conditions; and an operation command unit for sending an operation command to each wind turbine based on the selected power limit condition.08-22-2013
20130214535METHOD OF OPERATING A WIND TURBINE AND WIND TURBINE - A method of operating a wind turbine has the following steps: receiving (08-22-2013
20100259046ACTIVE CONTROL SURFACES FOR WIND TURBINE BLADES - A wind turbine has a longitudinal airfoil blade that exerts a torque on the generator in response to an impinging air current. A compliant airfoil edge arrangement is disposed along an edge of the airfoil blade for at least a portion of a longitudinal dimension of the airfoil blade. A morphing drive arrangement varies a configuration of the compliant airfoil edge arrangement and consequently the aerodynamic characteristics of the airfoil blade. A drive arrangement applies actuation forces to the upper and lower compliant surfaces via the upper and lower actuation elements. The compliant airfoil edge is arranged as a trailing edge of the airfoil blade.10-14-2010
20100013227METHOD FOR OPERATING A WIND ENERGY INSTALLATION - The invention relates to a method for the operation of a wind power plant (01-21-2010
20100225113METHOD FOR THE OPERATION OF A WIND TURBINE AND WIND TURBINE USING THIS METHOD - A method for the operation of a wind turbine comprising a rotor with at least one rotor blade, a generator and a speed regulator for regulating the rotational speed of a drive train element by adjusting a generator torque and/or a blade pitch angle, comprising the steps of: determining the angular speed of the drive train element through the time derivative of an angular position signal, determining the angular acceleration of the drive train element, presetting desired values for the generator torque and/or the blade pitch angle taking into account the angular speed of the drive train element and the angular acceleration of the drive train element, wherein the angular acceleration of the drive train element is determined from the angular position signal, wherein a filtering with an upper cut off frequency is performed after the first time derivative of the angular position signal and before a second time derivative of the angular position signal, said upper cut off frequency being tuned to a maximum adjustment speed of the generator torque and/or of the blade pitch angle.09-09-2010
20100001527CONTROLLABLE PHASE-ANGLE CONVERTER - A system for a wind energy installation. The wind energy installation feeds electrical power into a power supply system. A phase control device can include a power supply system fault detector, a phase angle detector, and a signal processing module. When a power supply system fault is detected, a phase error signal can be determined. A preset angle signal can be determined based on the phase error signal. The preset angle signal can be provided to a converter which can emit electrical power having a phase angle corresponding to the preset angle signal into the power supply system. Accordingly, an undesirable sudden surge in power output resulting from a phase change occurring at the end of the power supply system disturbance can be avoided.01-07-2010
20100001525Vertical Shaft Type Windmill with Arcuate Hook Shaped Vane Blades - A vertical shaft type windmill with arcuate hook shaped vane blade is composed of a tower, a rotary stand, a wind vane assembly, a generator and an electric controller. The present invention makes use of the wind power to drive the aforesaid structure to produce the mechanical power which being afterwards converted into the electrical power to supply various loads such as the domestic appliances, the public and roadway lighting. The structure is simply constructed, easy to fabricate and operate.01-07-2010
20100001526Wind Turbine Generator System - Provided is a wind turbine generator system that can more accurately perform cut-out control by monitoring the measured value from an anemometer for abnormality. In the wind turbine generator system including, in a nacelle (01-07-2010
20100276931METHOD OF OPERATING A WIND PARK - A wind park system is disclosed. Briefly described, one embodiment comprises at least one wind power installation having a generator for the delivery of electrical power to an electrical network, characterized in that the power delivered to the network by the wind park is regulated or adjusted in dependence on the network frequency of the electrical network.11-04-2010
20110031748WIND TURBINE GENERATOR, CONTROL METHOD FOR WIND TURBINE GENERATOR, WIND TURBINE GENERATOR SYSTEM, AND CONTROL METHOD FOR WIND TURBINE GENERATOR SYSTEM - [Problem] It is an object to stabilize a utility grid even when an unexpected fluctuation in the frequency of the utility grid occurs.02-10-2011
20120139245OPERATING METHOD FOR A WIND PARK - The present invention concerns a method of operating a wind park having a plurality of wind power installations. A wind power installation includes an electrical energy storage means associated with the wind power installation to store electrical energy which is consumed for starting up the wind power installation after stoppage and consumed for emergency shutdown of the wind power installation. In some embodiments, the wind power installation includes a control system to control taking of energy from the electrical energy storage means for an emergency shutdown procedure such that a sufficient emergency shutdown reserve is maintained in the electrical energy storage means to start a first wind power installation without consuming energy from a network.06-07-2012
20120139243METHOD AND SYSTEM FOR RESONANCE DAMPENING IN WIND TURBINES - A resonance damping system for a wind turbine having a generator connected to a power grid, the resonance damping system comprising an adaptive resonance damper, operable to provide a control signal for the generator, wherein the variable torque signal of the adaptive resonance damper is automatically adjusted according to a parameter which represents a grid condition.06-07-2012
20120139242SYSTEM AND METHOD FOR ADJUSTING A BENDING MOMENT OF A SHAFT IN A WIND TURBINE - A system and method for adjusting a bending moment of a shaft in a wind turbine are disclosed. The system includes a pillow block accepting the shaft therethrough, a sensor mounted to the pillow block and measuring deformation of the pillow block, and a control system communicatively coupled to the sensor. The control system is configured to adjust a rotor blade in response to the deformation of the pillow block. The method includes measuring a deformation of a pillow block, and adjusting a rotor blade in response to the deformation of the pillow block. The pillow block accepts the shaft therethrough.06-07-2012
20100230968TETHERED GLIDER SYSTEM FOR POWER GENERATION - A complete fully-automated airborne wind energy generation system with three major components; a ground-based energy trailer anchored to the ground containing a reel, motor/generator, motor controller with regenerative braking, a low-friction capstan, and a microcontroller; an ‘aerie’ elevated launch and landing platform free to weathervane in the wind, with a tether flag deployment and collection device; a statically and dynamically stable rotor-glider with variable pitch rotor blades enabling jump-launch, on-board weather and load sensors, microcontroller, and cell or satellite phone data connections to a centralized database; and a high-strength low-weight tether connecting all the components together.09-16-2010
20100237616Multi Directional Augmentor and Diffuser - This invention relates to increasing the use of an adjustable or flexible augmenter for increasing the power generation primarily used for utilizing wind energy. The adjustable augmenter is a wind enhancement structure with a plurality of flexible walls connected to each other with supporting horizontal elongated members. In the preferred embodiment, the invention is used with a plurality of smaller blades on a rotation means connected to a tower structure with a plurality of the rotation means and an inlet air flow regulation to achieve optimal power output. A preferred embodiment includes lightweight low cost structure of flexible wall to enhance an air flow into impact impellers connected to a rotation means creating a swept area with a height to diameter ratio of greater than four. A preferred embodiment includes wherein said impact impellers connected to a rotation means creating a swept area with a height to diameter ratio greater than ten.09-23-2010
20100237617WIND TURBINE OPERATION SYSTEM AND METHOD - A method of operating a wind turbine comprises obtaining current wind speed, forecasting wind speeds by creating probability density functions of wind speeds at a series of time points in the future based on the obtained current wind speed and past wind speeds, determining operating parameters of the wind turbine for the forecasted wind speeds, and controlling the wind turbine based on the determined operating parameters.09-23-2010
20100237618Wind power generator system - A wind power generator system includes a windmill rotor including a blade whose pitch angle is variable; a generator driven by the windmill rotor; and a control unit controlling output power of the generator and the pitch angle of the blade. The control unit performs a first control in which the output power is controlled in accordance with a predetermined power-rotational speed curve until the rotational speed is increased to reach a predetermined rated rotational speed, and a second control in which the output power is controlled to a predetermined rated power when the rotational speed exceeds the rated rotational speed. The control unit is responsive to the pitch angle for maintaining the second control or for switching to the first control, when the rotational speed is reduced below the rated rotational speed after the control unit is once placed into the state of performing the second control.09-23-2010
20120193915REACTIVE VOLTAGE CONTROL SYSTEM AND METHOD FOR WIND POWER FIELD OF DOUBLE-FED WIND POWER-GENERATING UNIT - The invention provides a reactive voltage control system and method for wind power field of double-fed wind power-generating unit. The system comprises dispatching center equipment, a power management module for the wind power field and a plurality of controllers for the double-fed wind power-generating unit, wherein the dispatching center equipment is used for calculating a reactive power set value of the wind power field; the power management module for the wind power field is used for distributing the reactive power set value in the wind power field; and the controllers for the double-fed wind power-generating unit are used for controlling corresponding double-fed wind power-generating unit to perform reactive power compensation. According to the reactive voltage control system and the reactive voltage control method for the wind power field of the double-fed wind power-generating unit, the reactive output capability of the double-fed wind power-generating unit can be fully exerted.08-02-2012
20100219634WIND TURBINE CONTROL METHOD, CONTROL UNIT AND WIND TURBINE - A wind turbine control method for dampening vibrations of a transmission system, even in the presence of voltage dips and in any event that is susceptible to reducing active current generation capacity, is provided. First, for example, an initial torque or power instruction may be calculated based on a turbine operating state. Next, a torque or power adjustment term associated with dampening vibration modes of a turbine transmission system may be calculated. Then, a final torque or power instruction may be calculated by, for example, applying the adjustment term to the initial instruction. Finally, the final torque or power instruction may be transformed into a current instruction for controlling the wind turbine.09-02-2010
20110210553Protection System of a Doubly-fed Induction Machine - The invention relates to a protection system of a doubly-fed induction machine, the system comprises a doubly-fed induction machine with a stator and a rotor, the stator of said doubly-fed induction machine is connected to a grid and the rotor of said doubly-fed induction machine is connected to the grid via a converter, said converter comprises a machine side converter, a DC-link and a line side converter. The system comprises additionally at least one crowbar, said crowbar is connected to the rotor, at least one DC-chopper provided in the DC-link, a converter controller and a separate protection device. The object of the present invention to provide a protection system and a protection method of a doubly-fed induction machine which can be easily used with high sampling rates and which provides a good protection for the doubly fed induction machine is resolved in that the DC-chopper and the crowbar are controlled with the separate protection device.09-01-2011
20100127495ESTIMATING AN ACHIEVABLE POWER PRODUCTION OF A WIND TURBINE BY MEANS OF A NEURAL NETWORK - A method for estimating an achievable power production of a wind turbine, which is operated with a reduced power set point is provided. The method includes determining the values of at least two parameters, inputting the values of the at least two parameters into a neural network, and outputting an output value from the neural network. The at least two parameters are indicative of an operating condition of the wind turbine. Thereby, the output value is an estimate of the achievable power production of the wind turbine. A control system which is adapted to carry out the described power estimation method is also provided. Furthermore, a wind turbine which uses the control system adapted to carry out the described power estimation method is provided.05-27-2010
20100219636POWER GENERATING SYSTEM - Provided is a power generator, including a plurality of wind power generators generating electrical power using wind power energy, and variable-speed wind power generators connected between the power generator and an electrical power system. The variable-speed wind power generators equalize an output of the entire power generating system by outputting power for correcting for a drop in output of the power generator.09-02-2010
20100219635INTEGRATED WIND ENERGY HARVESTING SYSTEM AND METHOD - A system for generating electricity from wind. The system includes a free-standing structure or some level of building integrated structure comprising at least one inlet, one exit and one APCC ahead of the turbine. At least one turbine is located near the exit end of the APCC. The turbine is adapted to convert wind energy into mechanical energy and the system then converts the mechanical energy into electrical energy and distributes it as designed and needed. At least one dynamically configurable flow control structure is located in the APCC between the air intake and the turbine. One or more dynamically configurable vanes are optionally located near the air inlet to maximize air flow into the APCC. A dynamic flow control system configures the flow control structure in response to air flow conditions to optimize the generation of electrical energy.09-02-2010
20100102560Wind Power Generation Apparatus, Wind Power Generation System And Power System Control Apparatus - A power system control apparatus which controls a power system electrically connected to a wind power generation apparatus having a wind turbine which receives wind and rotates, a generator which generates electric power by the rotating wind turbine, and a power converter which converts the electric power generated by the generator. The power system control apparatus includes a voltage detector for detecting a voltage of the power system, a reactive power command value generation unit for generating a reactive power command value from a voltage detection value of the voltage detector, and a transmission unit for transmitting the reactive power command value to the wind power generation apparatus. Output fluctuation of the generator is suppressed, and reactive power according to the reactive power command value is transmitted from the wind power generation apparatus to the power system.04-29-2010
20110057446WIND TURBINE OPERATION METHOD AND SYSTEM - The invention relates to wind turbines provided with doubly fed induction generators and with at least one power converter which is novel in that, under certain circumstances, it enables the turbine to operate as a full converter (FC) system, as a doubly fed (DFIG) system or as an asynchronous (AS) system, thereby increasing turbine availability.03-10-2011
20110057445METHOD OF OPERATION OF A WIND TURBINE TO GUARANTEE PRIMARY OR SECONDARY REGULATION IN AN ELECTRIC GRID - The invention controls the network frequency via an active power reserve obtained by interacting in a coordinated manner with the speed regulation that acts on the power generated or on the pitch angle, to guarantee primary or secondary regulation across the whole range of wind speed.03-10-2011
20100045040Variable Speed Wind Turbine With Doubly-Fed Induction Generator Compensated For Varying Rotor Speed - A variable rotational speed wind turbine includes a doubly-fed induction generator, a rotor current controller for controlling the rotor currents of the generator, a compensation mechanism having a computation mechanism, and an input mechanism for providing input to the compensation mechanism, the input being representative of at least the instantaneous angular speed of the rotor of the generator. The computation mechanism is arranged to compute an instantaneous compensation control output in dependency of the instantaneous angular speed of the rotor of the generator and feed the compensation control output to the rotor, and to compute the compensation control output during operation of the wind turbine to compensate at least partly for dependencies on the rotor angular speed of the locations of poles of a generator transfer function, thus making a resulting generator transfer function substantially independent of variations in the rotor angular speed during operation of the wind turbine.02-25-2010
20080315585CONTROL SYSTEM FOR TWIN TURBINE WIND POWER GENERATING SYSTEM - A wind turbine control system for twin turbines mounted in common on an accelerator comprising a DC boost converter having pulse width capability, power, speed, current and voltage sensors responsive to an generator driven by one turbine, and a controller. The controller adjusts the PWM duty cycle to adjust generator output whereby to control turbine thrust and thereby adhere to a desired performance curve, and also changes thrust to adjust angular position of the accelerator and thus maintain optimum angle of attack of the wind on turbine12-25-2008
20090278351HIGH VOLTAGE DIRECT CURRENT LINK TRANSMISSION SYSTEM FOR VARIABLE SPEED WIND TURBINE - A variable speed wind turbine having a doubly fed induction generator (DFIG), includes an exciter machine mechanically coupled to the DFIG and a power converter placed between a rotor of the DFIG and the exciter machine. Thus, the power converter is not directly connected to the grid avoiding the introduction of undesired harmonic distortion and achieving a better power quality fed into the utility grid. Moreover, the variable speed wind turbine includes a power control and a pitch regulation.11-12-2009
20090322081WIND TURBINE WITH PARALLEL CONVERTERS UTILIZING A PLURALITY OF ISOLATED GENERATOR WINDINGS - A system and method are provided to isolate outputs of parallel converter threads of a power system converter on a generator side of a wind turbine generator by utilizing isolated power windings on the wind turbine generator. Such isolation eliminates the circulating common mode current between the parallel converters of the wind turbine system and eliminates the need for a common mode inductor. System reliability is enhanced and total system cost is reduced.12-31-2009
20090322082WIND TURBINE WITH PARALLEL CONVERTERS UTILIZING A PLURALITY OF ISOLATED TRANSFORMER WINDINGS - A system and method are provided to isolate outputs of parallel converter threads of a power system converter of a wind turbine generator by utilizing isolated power windings on the output transformer from the converter. Such isolation eliminates the circulating common mode current between the parallel converters of the wind turbine system and eliminates the need for a common mode inductor. System reliability is enhanced and total system cost is reduced.12-31-2009
20100295303Tethered system for power generation - A system for power generation comprises a wing, a turbine, a tether, and a tether tension sensor. The wing is for generating lift. The turbine is coupled to the wing and is used for generating power from rotation of a propeller or for generating thrust using the propeller. One end of the tether is coupled to the wing. The tether tension sensor is for determining a tension of the tether.11-25-2010
20090212565WIND ENERGY PLANT WITH PITCH CONTROLLER - A wind energy plant having at least one rotor blade with a pitch angle, the pitch angle being adjustable by means of a pitch controller, and a generator converter unit, at least one electrical quantity of the generator converter unit being adjustable by means of a converter controller, wherein the wind energy plant has a power train with a rotor having the at least one rotor blade, the rotor being disposed at a front end of the power train and the power train leading to the generator converter unit, wherein a first rotation speed detection unit is provided at the power train near the front end of the power train and a second rotation speed detection unit is provided at the power train near the generator converter unit, wherein the measured rotation speed n08-27-2009
20090322085METHOD AND APPARATUS FOR ENHANCED WIND TURBINE DESIGN - An improved wind turbine system can have a generator or set of generators at the base of a tower and one or more sets of propeller hubs at the top of the tower. The sets of propeller hubs can be on opposite sides of the tower to account for the reduction in weight from having the generators at the base of the tower. The wind turbine system can have a conveyor system to move parts of the tower and/or the propeller hubs up and down to thereby reduce the height of the system for installation and maintenance purposes. Transmissions can be coupled to the propeller hubs to adjust the torque load on the turbines depending on the amount of wind. Additional generators can be connected to the propeller hub to increase the torque load.12-31-2009
20090115190SYSTEMS AND METHODS FOR PRODUCING, SHIPPING, DISTRIBUTING, AND STORING HYDROGEN - These inventions related to systems and methods for producing, shipping, distributing, and storing hydrogen. In one embodiment, a hydrogen production and storage system includes a plurality of wind turbines for generating electrical power; a power distribution control system for distributing, and converting the electrical power from the wind turbines, a water desalination and/or purification unit which receives and purifies seawater, and an electrolyzer unit that receive electrical power from the power distribution system and purified water from the desalination units and thereby converts the water into hydrogen and oxygen. After its production, hydrogen is stored, transported, and distributed in accordance with various embodiments.05-07-2009
20090146426Power converters - The present invention provides a power converter that can be used to interface a generator (06-11-2009
20090115191METHOD FOR THE OPERATION OF A WIND ENERGY PLANT - The invention relates to a method for the operation of a wind energy plant (05-07-2009
20090108583WIND TURBINE AND METHOD FOR OPERATING SAME - A wind turbine includes an asynchronous generator having a rotor and a stator, means for determining an actual torque-speed curve of the generator, means for determining an actual grid frequency, and means for determining a shifted torque-speed curve in response to the determined actual grid frequency if the determined actual grid frequency is higher than a predetermined upper frequency limit or lower than a predetermined lower frequency limit. The means for determining a shifted torque-speed curve is further adapted to determine the shifted torque-speed curve such that an increase in the rotor voltage of said generator rotor is counteracted when shifting the actual torque-speed curve to the shifted torque-speed curve. The wind turbine further includes means for shifting the actual torque-speed curve of the generator to the shifted torque-speed curve.04-30-2009
20100308584INTEGRATED WIND TURBINE CONTROLLER AND INVERTER - The present invention relates to a method and apparatus for power generation, and in particular a method and apparatus for the control of electrical power generation for use primarily with wind turbines. A method of electrical power generation is described including the steps of: receiving power in the form of alternating current; rectifying said alternating current power to direct current power; control said direct current power to produce controlled direct current power; and inverting said near constant direct current power to produce alternating current.12-09-2010
20100308586 Wind Turbine Systems Using Continuously Variable Transmissions and Controls - A wind turbine system is disclosed comprising: a plurality of turbine blades; a continuously variable transmission coupled to said plurality of turbine blades; a generator coupled to said continuously variable transmission; wherein said generator generates electricity and outputs said electricity to a load/grid; and a controller providing control signals as a filtered function of power to said continuously variable transmission. The controller of said wind turbine system may also continuously maintain the parameter dP/dR substantially zero where P is power and R is the ratio of the transmission.12-09-2010
20100301606WIND-TURBINE-DYNAMIC-CHARACTERISTICS MONITORING APPARATUS AND METHOD THEREFOR - It is an object to enable stable operation of a wind turbine and to change a control parameter of the wind turbine at an appropriate timing. A dynamic-characteristics model of a wind turbine is identified for each of a plurality of ranges that are determined in accordance with wind speed, and the identified dynamic-characteristics model is monitored for each of the ranges.12-02-2010
20130134711WIND TURBINE - A wind turbine (05-30-2013
20100308585APPARATUS AND METHOD FOR CONTROLLING THE REACTIVE POWER FROM A CLUSTER OF WIND TURBINES CONNECTED TO A UTILITY GRID - The present invention relates to a method for increasing a total reactive power capability of a cluster of wind turbines operationally connected to a grid. The method comprises the steps of generating a voltage value representative of a grid voltage level, determining a total required reactive power value based on the voltage value, and activating at least one wind turbine in said cluster to increase the total reactive power capability from a present value to the required total reactive power value by a predetermined amount. Moreover, the present invention relates to a system suitable for carrying out the before-mentioned method.12-09-2010
20110248500CONTROL OF A WIND TURBINE GENERATOR - A method for controlling a wind turbine generator is disclosed. The method comprises comparing an output power reference value and an actual output power value in a first control block with a first controller having a first control dynamics, comparing the output from the first control block with an actual generator shaft power value in a second control loop with a second controller having a second control dynamics, to determine a generator control signal, wherein the output power reference value is fed-forward and summed with the output of the first controller in the first control block. The disclosed method allows for fast reactions to changes in the output power reference value by the second controller regardless of the speed of the first controller.10-13-2011
20110121570SYSTEM AND METHOD FOR CONTROLLING A TETHERED FLYING CRAFT USING TETHER ATTACHMENT POINT MANIPULATION - A tethered airborne electrical power generation system which may utilize a strutted frame structure with airfoils built into the frame to keep wind turbine driven generators which are within the structure airborne. The primary rotors utilize the prevailing wind to generate rotational velocity. Electrical power generated is returned to ground using a tether that is also adapted to fasten the flying system to the ground. The flying system is adapted to be able to use electrical energy to provide power to the primary turbines which are used as motors to raise the system from the ground, or mounting support, into the air. The system may use an attachment mechanism for the tether adapted to move the tether attachment point relative to the flying craft.05-26-2011
20120133139Method for controlling wind turbines, and devices therefore - A wind turbine control master unit has a communication interface and a signal processing unit. The communication interface is configured to receive a rotor rotational speed of at least a first and a second wind turbine over a communication link. The signal processing unit is configured to determine a synchronized rotor speed value based on a mean value of the rotor rotational speeds. The signal processing unit is configured to calculate a synchronized azimuth angle value based on integrating the synchronized rotor speed value. Further, the communication interface is configured to send the synchronized rotor speed value and the synchronized azimuth angle value over a communication link. Also, a signal light control module and a wind turbine in connection with the control master unit are provided.05-31-2012
20090243297SPEED REDUCER FOR USE IN YAW DRIVE APPARATUS FOR WIND POWER GENERATION APPARATUS, AND YAW DRIVE METHOD AND APPARATUS FOR WIND POWER GENERATION APPARATUS USING THE SPEED REDUCER - A yaw drive method of a wind power generation apparatus, in which a second gear engaged with a first gear attached to one of tower or a wind power generation unit supported to the upper end of the tower so as to be capable of yawing and supported to a tower or to the upper end of the tower is rotated by a drive motor attached to the other of the tower or the wind power generation unit for yawing the wind power generation unit. A drive energy, which is supplied to the drive motor for a predetermined time from when the supply of the drive energy to the drive motor begins to start, is made to be smaller than the drive energy supplied to the drive motor in a common yawing.10-01-2009
20110109086Wind Energy Installation and Method of Controlling the Output Power from a Wind Energy Installation - A wind energy installation and a method of controlling the output power from a wind energy installation to an electrical grid with a specified nominal grid frequency are provided, in which the output power is controlled as a function of the time derivative of the grid frequency.05-12-2011
20100133822METHOD AND SYSTEM FOR VERIFYING WIND TURBINE OPERATION - A wind turbine verification system is described that includes a wind turbine controller having a plurality of wind turbine operating parameters stored therein and a verification device that includes a processor, memory device, and user input mechanism. The verification device is configured to communicatively couple to the wind turbine controller via a data link. The verification device is also configured to receive at least one parameter from the wind turbine controller and execute a verification program on the wind turbine controller, wherein the verification program is configured to iterate through a plurality of predefined tasks. The verification device is configured to verify at least one operating condition of a wind turbine based on the executed verification program.06-03-2010
20100133819WIND TURBINE ACOUSTIC EMISSION CONTROL SYSTEM AND METHOD - A system and method for controlling noise generated from a wind turbine is disclosed. The method includes selectively adjusting the angle of pitch of the blade in response to an amount of noise generated being above a predetermined amount and maintaining the amount of noise generated at or below the predetermined amount of noise.06-03-2010
20100133818METHOD AND SYSTEM FOR NOISE CONTROLLED OPERATION OF A WIND TURBINE - A method for controlling noise generated from a wind turbine. The method including providing a blade attached to a hub having a rotor shaft, and a generator in communication with the rotor shaft. The at least one blade includes an adjustable pitch angle. The method further includes providing a wind turbine acoustical profile and a wind turbine power profile. The wind turbine acoustical profile and the wind turbine power profile are compared to determine a noise reduced operational condition. The wind turbine is controlled to provide a rotor speed and the pitch angle of the blade corresponding to the noise reduced operational condition.06-03-2010
20100133817METHOD AND APPARATUS FOR CONTROLLING THE TIP SPEED OF A BLADE OF A WIND TURBINE - A method for controlling a tip speed of a blade of a wind turbine. The method includes determining the wind speed proximate the wind turbine; maintaining a first substantially constant rotational speed of the tip of the blade during variable wind speeds above a first predetermined nominal wind speed and below the second predetermined nominal wind speed; maintaining a second substantially constant rotational speed of the tip of the blade during variable wind speeds above a second predetermined nominal wind speed. The noise generated by wind at the second predetermined nominal wind speed is greater than noise generated by the blade at the second constant rotational speed of the tip of the blade.06-03-2010
20100133815Method and Apparatus for Operating a Wind Turbine During a Loss of Communication - A method for operating a wind turbine during a loss of communication is described that includes coupling a pitch controller to at least one wind turbine blade and to a wind turbine controller, establishing communication between the pitch controller and the wind turbine controller, and detecting a loss of communication between the pitch controller and the wind turbine controller. After a loss of communication is detected, the method further includes waiting for a first predetermined amount of time to elapse, independently pitching the at least one wind turbine blade to a predetermined position, waiting for a second predetermined amount of time to elapse, and maintaining the at least one wind turbine blade in the predetermined position until a rotation of the at least one wind turbine blade stops.06-03-2010
20100133814LOAD IDENTIFICATION SYSTEM AND METHOD OF ASSEMBLING THE SAME - A method of identifying a load on a wind turbine is provided. The method includes sensing accelerations of a rotor in a plurality of dimensions via at least one acceleration sensor and transmitting, from the acceleration sensor, signals indicative of the sensed accelerations to a control system. The method also includes receiving, at the control system, the transmitted signals from the acceleration sensor and identifying, via the control system, a load on the wind turbine based on the received signals.06-03-2010
20110109085Power Oscillation Damping Employing a Full or Partial Conversion Wind Turbine - A wind turbine (05-12-2011
20090174186Method For Controlling A Wind Turbine Connected To The Utility Grid, Wind Turbine And Wind Park - The invention relates to a method for controlling a wind turbine connected to the utility grid comprising steps of detecting a fault of the utility grid, and controlling one or more rotor blades in a fault mode wherein said one or more rotor blades are pitched in order to stabilize the rotor speed within an over speed range. The invention also relates to a wind turbine and a wind park comprising at least two wind turbines.07-09-2009
20110006526Pitch control arrangement for wind turbine - A pitch control arrangement for a wind turbine of the vertical axis type. Cam element and cam follower element are arranged to set the pitch angle of a turbine blade in accordance with a predetermined cyclic variation. The cam element includes a cam surface of different cam profiles, which define different predetermined cyclic variation of the pitch angle. The present invention provides an improved efficiency for a wind turbine irrespective of actual wind conditions, and further, both self-starting capability and high efficiency at a wide range of rotation speeds is accomplished using a simple and reliable construction.01-13-2011
20100133828CONDITION MONITORING SYSTEM FOR WIND TURBINE GENERATOR AND METHOD FOR OPERATING WIND TURBINE GENERATOR - A method for operating a wind turbine generator includes generating at least one of a plurality of rotor shaft angular displacement values, a plurality of rotor shaft angular velocity signals, and a plurality of rotor shaft angular acceleration signals. The method also includes determining a torsional moment within a rotor shaft, and modulating at least one of a wind turbine generator yaw orientation and a blade pitch orientation as a function of the determined torsional moment.06-03-2010
20110025062SYSTEM FOR EVALUATING AND CONTROLLING THE EFFICIENCY OF A WIND TURBINE - The invention relates to a system for evaluating the efficiency of a wind turbine (02-03-2011
20110025061CONTROL SYSTEM FOR A WINDMILL KITE - A control system for a windmill kite having a platform tethered by at least one tethering line, and supporting a plurality of rotors that provide lift to keep the kite aloft and to generate electrical power. The control system comprises a computer and controller. The computer comprises a memory circuitry accessible by a microprocessor, the memory circuitry storing data representing at least one set of stored reference values. The controller arranged for regulating at least one functional parameter of the kite by controlling at least one operating characteristic of the rotors, with the computer cyclically retrieving a plurality of sensed environmental parametric values from sensors disposed on or near the kite, and processes a set of output values by comparing the sensed parametric values to the set of stored reference values, the output values are then forwarded to the controller for adjusting at least one operating characteristic of the rotors.02-03-2011
20110018271DEVICE AND METHOD OF ADJUSTING CURTAILMENT STRATEGY FOR WIND TURBINE, AND PROGRAM - An object is to suppress reduction of energy production as much as possible while ensuring an expected lifetime. There is provided a device of adjusting a curtailment strategy for a wind turbine, the device including: a fatigue equivalent load calculation unit that calculates a fatigue equivalent load for evaluating a fatigue damage of the wind turbine in a predetermined time period by using load data of the wind turbine; and a setting value update unit that compares the fatigue equivalent load with a reference load determined by an expected lifetime of the wind turbine, and, when a difference between the fatigue equivalent load and the reference load exceeds a predetermined threshold value, updates the condition setting value for the curtailment that is currently employed according to the difference.01-27-2011
20110042950WIND TURBINE GENERATOR AND METHOD OF CONTROLLING THE SAME - An object of the invention is to reduce stop time of a wind turbine generator caused by icing on a wind turbine blade in the wind turbine generator. The invention provides the wind turbine generator including an ice detecting unit for detecting an amount of icing on a wind turbine blade, wherein an operation mode is switched to a no-load operation mode with no power being generated in a case where the icing amount detected by the ice detecting unit exceeds a first predetermined value, and an icing amount is detected by the ice detecting unit in a state where the apparatus is operated in the no-load operation mode.02-24-2011
20110042951WINDMILL ROTATION DETECTION/MANAGEMENT DEVICE AND WIND POWER GENERATION SYSTEM - An apparatus comprising: a first input that receives a first rotational speed information of a windmill mechanically generated by a mechanical rotation detection unit; a second input that receives a second rotational speed information of the windmill based on an alternating current output of a generator attached to the windmill; and a controller configured to compare the first and second rotational speed information, to determine whether a difference between the first and second rotational speed information is greater than a predetermined value and to execute a predetermined anomaly processing in response to the difference being greater than the predetermined value.02-24-2011
20110115224METHOD FOR CONTROLLING AT LEAST ONE ADJUSTMENT MECHANISM OF A WIND TURBINE, A WIND TURBINE AND A WIND PARK - Method for controlling at least one adjustment mechanism of a wind turbine, said method comprising the steps of: establishing at least one load or operational value of the wind turbine, choosing a combination of at least two control strategies from a set of different control strategies based on the established at least one load or operational value, and applying the chosen combination of control strategies to control said at least one adjustment mechanism. The invention also relates to a wind turbine and a wind park.05-19-2011
20090212567CONTROLLER FOR A BLADE ADJUSTMENT ANGLE OF AT LEAST ONE ROTOR BLADE OF A WIND POWER PLANT - Controller for a blade adjustment angle for at least one rotor blade of a wind power plant, in which a first controller branch is switched for the determination of the blade adjustment angle depending on the operating states of the wind power plant, wherein at least one differentiating member is provided in the switched first controller branch.08-27-2009
20090033097WIND PARK WITH A PLURALITY OF WIND ENERGY PLANTS AND METHOD FOR THE OPERATION OF THE WIND PARK - A method for the operation of a wind park with a plurality of wind energy plants, which each one have one control unit at a time, which can control and/or adjust the wind energy plant in response to a received desired value for an electric variable, the method having the following steps: a higher order control calculates and/or receives a currently permitted maximum value for the electric variable which the wind park is allowed to provide, the higher order control determines a desired value for the electric variable for each wind energy plant and forwards the same to the wind energy plants, characterised in that the higher order control determines the desired value for each one of the wind energy plants depending on the currently maximum and/or minimum available values of all the wind energy plants.02-05-2009
20100013224USE OF PITCH BATTERY POWER TO START WIND TURBINE DURING GRID LOSS/BLACK START CAPABILITY - The disclosure concerns a wind power plant and its operation during grid loss, wherein the wind power plant comprises a plurality of rotor blades, a blade pitch drive, a rotor shaft, an electric generator, and a control unit for controlling the operations of the wind power plant, wherein the plurality of rotor blades are rotatably connected to the rotor shaft, such that the pitch of the rotor blades can be adjusted by the blade pitch drive under the control of the control unit, and wherein the rotor shaft is operatively connected to the electric generator for generating electric energy, the wind power plant further comprising an energy storing unit for powering the blade pitch drive, wherein the control unit comprises a control module for adjusting the rotor blades and for entering a self-sustaining mode of operation of the wind power plant. With the self-sustaining mode of operation basic functions of the wind power plant, in particular safety and security functions as well as lubrication of the rotatable parts of the wind power plant are sustained even for long periods of a grid loss.01-21-2010
20090322084Energy Systems, Energy Devices, Energy Utilization Methods, and Energy Transfer Methods - Energy systems, energy devices, energy utilization methods, and energy transfer methods are described. In one arrangement, energy utilization methods include providing first energy from a power grid to an induction generator at a first moment in time; using the induction generator and the first energy from the power grid, charging an energy storage device; using second energy from the energy storage device, powering a motor causing the induction generator to generate third energy during a second moment in time; and providing the third energy to the power grid. Other arrangements are described.12-31-2009
20110241343Speed Setting System and Method for a Stall-Controlled Wind Turbine - A speed setting system that generates a speed control command for controlling the rotational speed of a stall-controlled wind turbine of a wind-powered machine. The speed setting system generates the speed command as a function of performance variation of the wind turbine due to environmental and/or other factors. The speed setting system utilizes a performance-compensation term that is slowly adjusted to compensate for relatively long-term performance variation. In one example, the performance-compensation term is adjusted only when the current power output of the wind turbine is at least 80% of the rated output power to ensure the wind speed is sufficiently high.10-06-2011
20110210549SYSTEM AND METHODS FOR ADJUSTING A YAW ANGLE OF A WIND TURBINE - A method of adjusting a yaw angle of a wind turbine. The wind turbine includes a nacelle that is rotatably coupled to a tower. The method includes coupling a yaw drive assembly to the nacelle for adjusting an orientation of the nacelle with respect to a direction of wind. A first sensor that is coupled to the wind turbine transmits at least a first monitoring signal that is indicative of an operating condition of the wind turbine to a control system. A yaw angle of the nacelle with respect to the direction of wind is calculated by the control system based at least in part on the first monitoring signal. The yaw drives assembly is operated to adjust a yaw of the nacelle based at least in part on the calculated yaw angle.09-01-2011
20110084486OFF-SHORE WIND TURBINE GENERATOR AND OFF-SHORE WIND FARM - An object is to provide an off-shore wind turbine generator capable of obtaining accurate information about the situation of a wind turbine itself, surrounding weather conditions, and the like. The off-shore wind turbine generator of the present invention generates power by driving a generator mechanism through the rotation of a rotor head to which wind turbine blades are attached and includes a monitoring apparatus for monitoring the wind turbine generator itself and its surrounding circumstances.04-14-2011
20110210552Asynchronous Power Generator for a Wind Turbine - An asynchronous power generator for a wind turbine is provided. The asynchronous power generator includes a voltage supply and a stator with stator coils supplied with an alternating voltage by the voltage supply. The voltage supply is configured to adjust the voltage supplied to the stator coils based upon an output power generated by the wind turbine. Further, a method of voltage control is provided.09-01-2011
20110210550POWER GENERATION UNIT AND A METHOD GENERATING ELECTRIC ENERGY - The invention relates to a power generation unit. The unit has a turbine (09-01-2011
20090218819AUTOMATIC GENERATION CONTROL AUGMENTATION FOR WIND PLANT INTEGRATION - An automatic generation control (AGC) augmentation system and method for wind power plant integration for controlling the power contribution to a grid by the wind plant is disclosed that provides for the calculation of the area control error (ACE) by actively communicating to the wind plant ramp rate limits and curtailment requests contributing to the ACE calculation. The augmented control of the ACE minimizes the amount of lost energy production by the wind plant.09-03-2009
20100181770Method and Apparatus for Fluid Turbine having a Linear Actuator - A fluid turbine apparatus contains a set of radially arranged magnets and a set of radially arranged coils axially aligned with the set of radially arranged magnets. A turbine base supports a first of the sets. A plurality of vanes having a rotatable connection to the turbine base is coupled to a second of the sets. A linear actuator supported on the turbine base influences the axial proximity of the set of radially arranged magnets to the set of radially arranged coils.07-22-2010
20110084485Control method for a wind turbine - A method of controlling a wind turbine, where a control signal for a controllable parameter of the wind turbine is determined, and the rotor power coefficient, the torque coefficient, and/or a thrust coefficient of the wind turbine are estimated at time intervals. From this is determined a variation parameter reflecting the variation of the estimated rotor power, torque or thrust coefficient over time. The wind turbine is then controlled according to the control signal only if the variation parameter is below an alert threshold, and otherwise according to a modified control strategy. The control signal may have a power or torque reference signal for controlling the rotational speed of the turbine or a blade pitch reference signal. The modified control method may for instance entail stopping or de-rating the wind turbine. A control system configured to perform the above control method, and a wind turbine comprising such system are also disclosed.04-14-2011
20090224543Method for the operation of a wind power plant and wind power plant - A method for the operation of a wind power plant (09-10-2009
20110148112Control System and a Method for Controlling a Wind Turbine - A control system for controlling operation of a wind turbine, a wind turbine having such a control system and a method for controlling a wind turbine are disclosed. The control system comprises a first sensor device and a second sensor device, each being arranged for measuring the same control parameter used for controlling operation of the wind turbine. The first sensor device has a first set of operating failure conditions, and the second sensor device has a second set of operating failure conditions. The first set of operating failure conditions comprises at least one operating failure condition which does not form part of the second set of operating failure conditions. The system further comprises a third sensor device for detecting an operating failure condition of the first sensor device and/or of the second sensor device. The control system is adapted to select between controlling operation of the wind turbine on the basis of control parameters measured by the first sensor device or on the basis of control parameters measured by the second sensor device, based on measurements performed by means of the third sensor device. Thereby a redundant system for measuring the control parameter is obtained, allowing reliable measurements of the control parameter, even under conditions where the first sensor device fails.06-23-2011
20090212568ENERGY SYSTEM - An energy system is specified, which comprises a wind power turbine or water power turbine, which is connected to a generator, with the generator having at least two stator windings. In order to achieve a simple and robust design without a transformer, each stator winding has an associated rectifier unit, and each stator winding is connected to the AC voltage side of the associated rectifier unit. Furthermore, each rectifier unit has a respective associated energy storage circuit, and each rectifier unit is connected in parallel on the DC voltage side to the associated energy storage circuit, with the energy storage circuits being connected to one another in series.08-27-2009
20090315329Variable Speed Synchronous Generator - An input shaft rotates at variable rotation rates and is driven by a variable speed source of energy or power such as by the propeller of a wind-driven electrical generator. The input shaft is connected to a first rotor which electromagnetically interacts with a second rotor to create a torque to cause the second rotor to rotate. The interaction of the first rotor and the second rotor may be varied electrically to vary the torque and in turn the rotation rate of the second rotor. The second rotor interacts with a stator to produce AC electrical power. The rotation rate of the second rotor is controlled so that the generator supplies AC power at an essentially constant frequency.12-24-2009
20090322086DRIVE CIRCUIT AND METHOD FOR INVERTERS OF WIND ENERGY INSTALLATIONS - A converter for a wind energy installation and a method. The converter includes an inverter which drives a generator via a plurality of phases and an intermediate circuit having an intermediate-circuit voltage between an upper and a lower intermediate-circuit potential. The generator is driven with phase potentials at a variable frequency. A shift value is calculated between an extreme phase potential and one of the intermediate-circuit potentials, a separation value is determined between a middle phase potential and the closest intermediate-circuit potential, and an additional voltage is generated using the separation value as amplitude. The phase potentials are shifted through the shift value and the additional voltage is added to the middle phase potential. Accordingly, the switching elements in the converter do not need to be clocked in every second half-cycle resulting in reduced switching losses and increased current load capacity of the converter.12-31-2009
20110175356CONTROL OF WIND PARK NOISE EMISSION - According to the present invention is provided a method of control of noise emission from a wind park in operation, the wind park comprising a plurality of wind turbines. The method comprises the steps of•providing measurements of at least one wind speed and of at least one wind direction to a park noise emission emulation module including for each of two or more of the plurality of wind turbines a wind turbine noise emission model being suitable for producing a prediction of noise emission from the wind turbine as a function of at least one operational characteristic, the geographical position of each of the plurality of wind turbines, and the geographical position of at least one noise immission point,•emulating the noise level at the at least one noise immission point as a result of noise emitted by the plurality of wind turbines, and•controlling the operation of the wind park from the result of the emulation so as to prevent the noise level at the at least one noise immission point from exceeding a predetermined threshold level. Furthermore, the invention relates to a wind park.07-21-2011
20100066085Non-Grid-Connected Wind Turbine Generator System with High Power, High Efficiency and Low Cost - Disclosed is a non-grid-connected wind turbine generator system with high power, low cost and high efficiency. The wind turbine generator system includes a wind rotor, a generator and a tower. The wind rotor is a fixed-pitch variable-rotation-speed wind rotor, the wind rotor shaft directly drives a rotor of the generator, and the generator is a power-controlled DC generator, a double-salient brushless DC generator, or a double-stator double-salient brushless DC generator. The rotation speed of the fixed-pitch wind rotor is directly controlled by a power-controlled generator and thereby the attack angle of wind rotor blade is controlled. When wind speed is greater than rated wind speed of the system, the wind rotor is controlled into a state of blade stall so as to limit power output of the wind rotor and effectively broaden the wind speed range of wind rotor.03-18-2010
20100066087WIND TURBINE GENERATOR, WIND TURBINE GENERATOR SYSTEM, AND POWER GENERATION CONTROL METHOD OF WIND TURBINE GENERATOR - To provide a wind turbine generator, a wind turbine generator system, and a power-generation control method of a wind turbine generator that are capable of improving the power-generation capability and reducing the fatigue load on the windmill. A data accumulation unit 03-18-2010
20120133133Method and System for Controlling an Electric Device of a Wind Turbine - A method for controlling an electric device of a wind turbine is disclosed. The method includes: receiving a state signal of a utility grid electrically connected to the electric device; and controlling an operation of the electric device based on the state signal. Further, a system for controlling an electric device of a wind turbine and a wind turbine are provided.05-31-2012
20110175354Method and a controlling arrangement for controlling an AC generator - The present disclosure relates to a method and a controller for controlling an AC generator which is used in convection with a wind turbine having variable speed. The multi-phase generator is connected to a controllable converter and is controlled to provide a desired power or a desired torque. An AC reference signal is generated, which would provide the desired power or torque. A P+Resonant converter may be used to control an electrical characteristic of the generator in view of the reference, by applying control signals to the controllable converter. Thereby, the need to transform the electrical characteristic into a rotating frame may be eliminated which provides for a less complex controller.07-21-2011
20110175353Wind farm power control based on matrix reflecting a power load distribution between individual wind turbines - A method for controlling the operation of a wind farm with a plurality of wind turbines is disclosed A setpoint vector is defined, wherein each component of the setpoint vector represents an individual power setpoint of one of the plurality of wind turbines. A dependency matrix, which reflects a desired power generation distribution between different wind turbines of the plurality of wind turbines, is determined. A power reference vector is calculated by multiplying the dependency matrix with the setpoint vector, such that the power reference vector comprises a coordinated power setpoint for each wind turbine. The operation of the wind farm is controlled based on the calculated power reference vector. A superordinate control system, a wind farm, a computer-readable medium and a program element, which are adapted for performing and/or for controlling the above described wind farm operation control method are further disclosed.07-21-2011
20110175352METHOD OF CONTROLLING A VARIABLE SPEED WIND TURBINE GENERATOR - Methods of controlling a variable speed wind turbine generator connected to a power grid. The method may include measuring the frequency, f, of the power grid, controlling the speed of the generator for optimizing the power delivered to the power grid, and setting limits for the generator speed. The setting of the limits for the generator speed is performed in dependency of the measured frequency of the power grid. This provides a dynamical set of limits providing improved possibilities of optimizing the power production.07-21-2011
20100066086APPARATUS AND SYSTEM FOR PITCH ANGLE CONTROL OF WIND TURBINE - A pitch control apparatus for controlling the pitch value for a wind power generation system includes a generator comparing unit that calculates an error signal based on a difference between a generator measurement signal corresponding with an operation of the power generation system and a generator reference signal, and a reference pitch calculating unit that calculates a reference pitch value using the error signal. The pitch control apparatus further includes a compensation pitch calculating unit that calculates a compensation pitch value using an error value from the wind power generation system and a pitch calculating unit that calculates a pitch value using the reference pitch value and the compensation pitch value. The error value may be any one of a voltage error value from a direct-current capacitor, a voltage error value from a grid connection point, a speed error value from a rotor, and a frequency error value from a grid connection point.03-18-2010
20120146332Method for Operating a Pitch-Controlled Wind Turbine - The invention is directed to a method for operating a pitch-controlled wind turbine having a rotor blade adjustable about its longitudinal axis and having a generator wherein a set-point for a generator torque (M) is specified in dependence upon a rotational speed (n) of the generator or of the rotor. A transition point (n06-14-2012
20120146331METHOD FOR REDUCING VIBRATIONS OF A WIND TURBINE AND CONTROL SYSTEM FOR REDUCING VIBRATIONS - A method for reducing vibrations of a wind turbine includes a plurality of set points characterizing set values of operation parameters of the wind turbine. The method includes measuring an acceleration force value corresponding to acceleration forces acting on the turbine, and determining whether the measured acceleration force value is above a predetermined threshold value. Furthermore, in case it is determined that the acceleration force value is above the predetermined threshold value, the set point value of at least one set point of the plurality of set points is modified in order to reduce the vibrations in such a way that a power output of the wind turbine is not reduced.06-14-2012
20110101691WIND TURBINE GENERATOR AND METHOD OF ESTIMATING WIND DIRECTION IN WIND TURBINE GENERATOR - Yaw control is performed such that a nacelle faces into an actual main wind direction. The actual wind direction is estimated by detecting the main wind direction with an anemoscope (wind direction detecting means), assuming the actual wind direction by assuming a wind direction offset value, which is a deviation between the main wind direction and the actual wind direction, which is a direction of wind which blows in actual use, at a predetermined wind speed with a wind direction assuming unit (wind direction assuming means), calculating an average generator output power for a predetermined period of time in the assumed actual wind direction with an average-generator-output-power calculation unit (average-generator-output-power calculation means), approximating the average generator output power with respect to the assumed wind direction offset value to a quadratic curve with an actual wind direction estimation unit (actual wind direction estimation means), and estimating the wind direction offset value at the time when the average generator output power is the maximum in the approximated quadratic curve to be an actual offset value.05-05-2011
20110074153Electrical contact element for high-current plug connectors and manufacturing method - The present invention relates to high-current plug connectors, in particular to electrical contact elements for plug connectors of this type, which are distinguished by low heating even at high currents, and to a corresponding method for manufacturing contact elements of this type. According to the invention, for this purpose, the contact element is made in one piece by internal high-pressure forming from a tubular blank. As a result, the contact element has at each point substantially the same line cross section, so that no local electrical or thermal load peaks can occur.03-31-2011
20110148111TURBINE - The invention concerns a turbine driving a power conversion means, the power conversion means comprising several power conversion units, preferably of approximately similar power conversion capacity, that have coupling means for coupling the power conversion units to the turbine, the turbine having measuring means for determining the rotation speed of the turbine and/or a flow speed of the turbine driving flow of wind or water and a control system for controlling the coupling means in dependence of the determined rotation speed and/or flow speed. In accordance with the invention the control system has means for activating and deactivating the coupling means for the different the power conversion units so that the power conversion units are used equally.06-23-2011
20110068577Apparatus for providing overload protection for wind power generator and method thereof - An apparatus for providing overload protection of a wind power generator and a method thereof are disclosed. When the wind power generator is exposed to wind force excesses a preset safety threshold, the apparatus is started to rotate a fan set and a nacelle of the wind power generator, so as to pose a rotational plane of a fan set parallel to the wind direction.03-24-2011
20110248499WIND TURBINE COMPRISING INSULATION MONITORING SYSTEM - The present invention concerns a wind turbine comprising a generator, a controller and a measurement equipment connected to the generator, the measurement equipment being adapted to measuring at least one quality parameter indicating the quality of generator insulation of the generator, and the measurement equipment being adapted to transmitting the at least one quality parameter to the controller, wherein the controller is adapted to evaluate the at least one quality parameter according to a quality criterion and set up an alarm signal in accordance with the evaluation. Further, the invention relates to a method for upgrading a wind turbine.10-13-2011
20110101689METHOD AND APPARATUS FOR GENERATING POWER IN A WIND TURBINE - A power converter for a wind turbine including an array of switching devices and a control module having a current damping device. The control module is configured to control a switching behavior of the array of switching devices and to receive a current having a first frequency component from the wind turbine. The current damping device is configured to reduce an amplitude of the first frequency component.05-05-2011
20110101690Wind farm and method for operation of a wind farm - A wind farm in which electrical power produced in the wind farm is transported via a wind-farm-internal network to a substation. Upon being transferred to an external network, the electrical power is transformed to a voltage which is higher by a selectable step-up ratio than the voltage in the wind-farm-internal network. The electrical load level on a wind energy installation in the wind farm is determined, and the step-up ratio is adjusted as a function of the electrical load level. Accordingly, it is possible to influence the voltage in the wind-farm-internal network such that the wind energy installations are subject to a lower electrical load level.05-05-2011
20110101688Multi purpose variable speed wind powered generator - A Multi Purpose Variable Speed Wind Powered Generator is configured to generate electrical power to all types of transportation and equipment in any wind condition. The wind speed monitor gives the variable pitch rotor the precise angle of attack to keep rotor RPM relative and stable at all wind speeds. A wind diverter keeps wind flowing through rotors with out wind back up or bottleneck. An onboard trip computer responds in like sequence in union with the wind monitor and rotors through out each trip. The onboard trip computer is designed to maintain rotor RPM as if the transpiration was moving from 10 to 40 miles per hour. The pitch changes as the wind speed changes keeping the rotor RPM relative. Rotor brakes are to slow or stop rotors movement at any time for any reason.05-05-2011
20110074152WIND TURBINE GENERATOR AND METHOD OF CONTROLLING THE SAME - In a case where a request for changing a maximum value of active power and a newly defined maximum value of active power are received from the utility grid side, a maximum value of an active power demand value set to a rated value is changed to the newly defined maximum value of active power at a predetermined change rate or less.03-31-2011
20110074154 Control System and a Method for Redundant Control of a Wind Turbine - A control system and a method for controlling operation of a wind turbine are disclosed. A first sensor and a second sensor are arranged for sampling or continuously measuring a first physical value and a second physical value being representative of a first physical impact and a second physical impact on components of the wind turbine in order to provide a first and a second control parameter for controlling operation of the wind turbine. The first and second control parameters are distinct. During active generation of energy the control system is adapted to selectively switch between controlling the operation of the wind turbine either on the basis of the first control parameter or on the basis of the second control parameter, i.e. to selectively switch between two different, distinct and independent control strategies. The two control strategies allow redundancy in control of the operation of the wind turbine. Both control strategies are based on measurements of actual physical impacts affecting the components of the wind turbine, thereby making it possible to control the wind turbine in a more optimal manner than when using prior art control systems and methods, regardless of which control strategy is selected.03-31-2011
20110074151MULTI-USE ENERGY STORAGE FOR RENEWABLE SOURCES - A power generation system having a wind turbine blade assembly, a generator mechanically coupled to the blade assembly, and a power converter coupled to the generator is provided. An energy storage device and a bidirectional converter coupling the energy storage device to the power converter are also provided in the system. An inertia controller is provided for generating a first transient signal to regulate active power from the wind turbine system when a power grid signal is outside of a respective signal range. The system further includes an energy storage controller for providing a second transient signal to the bidirectional converter to regulate a power to or from the energy storage device based upon the first transient signal, power generating system conditions or combinations thereof.03-31-2011
20120119496Wind Turbine Having A Device For Minimizing Loads - A wind turbine comprising a tower, an energy conversion unit arranged on the tower, a rotor, which is connected to the energy conversion unit and has two rotor blades fastened to a hub, a measuring system arranged in the hub for measuring the mechanical deformation of the hub, and an individual blade controller for setting the blade pitch angle of the rotor blades. The measuring system is designed to detect the distance between two defined locations opposite each other in the hub, and the individual blade controller is designed to set the blade pitch angle of both rotor blades, on the basis of the distance measured between the defined locations or the distance change measured between the defined locations, in such a way that a minimum rotor pitch torque M05-17-2012
20120119495WIND FARM, WIND POWER PLANT IN A WIND FARM AND OPERATING CONTROL FOR THIS PURPOSE - Wind farm and method of controlling operation of a wind farm. The wind farm including a plurality of wind power plants, each equipped in a same manner with a pivoted rotor structure and a control device for controlling the operation of the individual wind power plants. The control device is structured and arranged to synchronize the rotary motions of the rotor structures of at least some of the plurality of wind power plants.05-17-2012
20110025058COMMUNICATING ENERGY STORAGES WITH DIFFERENT FUNCTIONS - An integrated system of communicating energy storage devices for supplying an alternate power source to operating systems for a wind turbine connected to an electrical grid, is provided. The integrated system includes at least one wind turbine with a rotor, the wind turbine being connected to an electrical grid. At least least one operating system of the at least one wind turbine requires an alternate power source during a wind turbine operating condition. Further included are a plurality of energy storage devices capable of supplying the alternate power source. Communication of energy storage between at least two of energy storage devices is provided.02-03-2011
20100295304METHOD AND APPARATUS FOR GRID LOSS RIDE-THROUGH FOR WIND TURBINE PITCH CONTROL SYSTEM - In a wind turbine/generator having a rotatable hub, at least one blade rotatably secured to the hub, a pitch control system for adjusting pitch of each blade, the pitch control system located within the rotatable hub, a stationary nacelle, and a slip ring assembly at a junction of an electrical circuit between the rotatable hub and the stationary nacelle, the slip ring assembly operatively arranged for transmission of electrical signals between equipment located within the rotating hub and equipment located within the stationary nacelle, an apparatus for grid loss ride-through for the pitch control system, comprising means for sensing and monitoring power on the rotating side of the slip ring assembly, and, means for supplying power to the pitch control system from a backup power source when the sensed power drops to a predetermined level.11-25-2010
20110248501Wind Power Plant - A method for moving a double-bladed rotor of a wind power plant into a parking position characterized by the orientation of the rotor blades in a horizontal plane and braking the rotor.10-13-2011
20130161953WIND POWERED ENERGY AMPLIFICATION SYSTEM AND METHOD - The present invention is comprised of a wind powered energy amplification method and systems for capturing wind power and harvesting tangentially amplified energy. The harvested tangentially amplified energy is converted, processed and stored for use for generating continuous, on demand and stand by electricity to supply electricity. The present invention is further comprised of methods and systems for extracting, processing and storing water and carbon dioxide to supply water and supply carbon dioxide.06-27-2013
20100301604WIND TURBINE, A METHOD FOR CONTROLLING A WIND TURBINE AND USE THEREOF - The invention provides for a wind turbine comprising a rotor comprising at least one rotor blade, a yaw controlling system including yaw control means, a yaw mechanism comprising one or more yaw motors and a yaw bearing, registration means for registering an idling power producing situation of the wind turbine in relation to a utility grid, and detection means for detecting edgewise oscillations in one or more of the blades. The yaw controlling system is adapted for changing the yaw position of the wind turbine nacelle when said registration means registers that said wind turbine is operating in an idling power producing situation and the detection means detects edgewise oscillations in one or more of the rotor blades, hereby damping or eliminating the edgewise oscillations. The invention further relates to a method for controlling a wind turbine and use hereof.12-02-2010
20100301605 WIND TURBINE, A METHOD FOR CONTROLLING A WIND TURBINE AND USE THEREOF - The invention relates to a wind turbine comprising a rotor including one or more pitchable blades, registration means for registering an idling power producing situation of the wind turbine in relation to a utility grid, detection means for detecting edgewise oscillations in one or more of the blades, and control means for controlling the pitch angle of one or more of the blades. The control means is adapted for changing the pitch angle of one or more of the blades when the registration means registers that the wind turbine is operating in an idling power producing situation and the detection means detects edgewise oscillations in one or more of the blades, hereby damping or eliminating the edgewise oscillations. The invention further relates to a method for controlling a wind turbine and use hereof.12-02-2010
20100295305WIND TURBINE AND CONTROL SYSTEM - A wind turbine system for generating electricity includes a turbine and a control system for managing the electricity generated by the turbine. The control system may include sensors for determining wind direction and wind speed and a controller that rotates the turbine into the wind if the wind speed is less than a threshold and out of the wind if the wind speed exceeds a threshold. The control system may also be adapted to supply electricity to one or more circuits within a home or residence. The electricity harvested from the turbine may be transferred by the control system to one or more batteries, or it may be transferred to the circuits within the residence. The electrical power extracted from the wind turbine may be harvested in a continuous manner, a pulsed manner, or a hybrid manner based upon control of the input impedances into the control circuit of subsystem.11-25-2010
20100259045Wing Energy Installation with Enhanced Overvoltage Protection - A wind energy installation and method for production of electrical energy from wind energy by means of the wind energy installation having a rotor which can be driven via wind power and has rotor blades whose pitch angles can be adjusted by means of at least one adjusting apparatus, which can be driven electrically, in order to influence the rotational speed of the rotor, wherein a generator rotor is connected to the rotor, and the generator rotor together with the stator forms a generator,10-14-2010
20100253079WIND ENERGY INSTALLATION WITH A HEATING DEVICE - A wind energy installation connected to a network. The installation includes a tower and a pod having a wind rotor and a generator driven by the wind rotor. The installation further includes a converter configured to output electrical power, a control device provided with a temperature sensor and a heating device, and a preheating module. The preheating module includes a thermal switch configured to monitor a temperature of at least one component of the wind energy installation and a monitoring unit having an output device. The monitoring unit operates the heating device until the thermal switch reaches a threshold, whereupon the output device transmits an enable signal to start the wind energy installation. Operational reliability of the wind energy installation in low ambient temperatures can be thus improved.10-07-2010
20100084864COLLISION WARNING SYSTEM FOR A WIND ENERGY INSTALLATION - The invention relates to a device for monitoring a wind energy installation (04-08-2010
20090001725Method for operation of a converter system - The present invention relates to a method for operating a converter system of a wind turbine, wherein the converter system includes converter modules capable of converting electric power produced by a generator to electric power applicable to a utility grid. The converter modules include generator inverters and grid inverters. The method determines the enabling/disabling of the converter modules in response to a parameter related to the variable amount of electric power being produced by the generator. Advantages of the present invention are optimisation of power efficiency of the converter modules and improved reliability of the converter modules. Another advantage is the capability of fast enabling and disabling of the converter modules.01-01-2009
20100244445SYSTEM AND METHOD FOR GENERATING POWER FROM A FAN - A system for generating power for a vehicle is provided. The system comprises a fan positioned to receive a flow of air, a turbine coupled to the fan, the turbine adapted to rotate the fan when operating in a first mode and to receive power from the fan when operating in a second mode, the turbine adapted to generate electrical power from the power received from the fan, and an electronic control unit adapted to selectively engage the first and second modes of the turbine.09-30-2010
20090273185System for Controlling and Protecting Against Symmetrical and Asymmetrical Faults for Asynchronous-Type Generators - The invention relates to a system for controlling and protecting against symmetrical and asymmetrical faults for double-fed asynchronous-type generators, which, in the event of a symmetrical or asymmetrical fault, remains connected to the grid, absorbing the initial transient, and maintains control of the aerogenerator. In this way, the invention fulfils the requirements of the various different grid connection standards relating to the supply of active and reactive power in fault situations, which are intended to assist in the recovery of the grid.11-05-2009
20090250931METHOD FOR OPERATING A WIND ENERGY PLANT WITH A DOUBLY-FED ASYNCHRONOUS MACHINE AND WIND ENERGY PLANT WITH A DOUBLY-FED ASYNCHRONOUS MACHINE - Method for operating a wind energy plant having a doubly-fed asynchronous machine, a grid-sided converter and a generator-sided converter both being controlled by a control means, the method comprising the following steps: in a regular operating mode the converters are controlled by the control means by means of command variables, in case of fault the converters are controlled by at least one control module which controls the torque and/or the active power and the reactive current and/or the reactive power by means of command variables such that a disconnection of the asynchronous machine from the grid will be performed only if the grid voltage falls below a predetermined voltage-time-characteristic curve, wherein the shape of the voltage-time-characteristic curve is configured by a plurality of pre-selectable parameters in the at least one control module.10-08-2009
20110148114Method and System for Operating a Wind Power Plant Comprising a Number of Wind Turbine Generators - This invention relates to a method and a system for operating a wind power plant (06-23-2011
20090230682Apparatus and method for determining a resonant frequency of a wind turbine tower - An apparatus for determining a resonant frequency of a wind turbine tower is provided. The apparatus includes a processing unit configured to receive an acceleration measurement value, the acceleration measurement value representative of the acceleration of the wind turbine tower in the direction parallel to a rotor rotational axis of the wind turbine and/or in the direction perpendicular to both the rotor rotational axis and the tower axis of the wind turbine. The apparatus includes a memory configured to store a series of acceleration measurement values, and the processing unit includes a Fourier transform module configured to calculate a spectral vector based on calculating a convolution-based fast Fourier transform of the series of acceleration measurement values, and includes a resonant frequency calculation module configured to calculate the tower resonant frequency based on the calculated spectral vector.09-17-2009
20090230681MODEL BASED WIND TURBINE DRIVE TRAIN VIBRATION DAMPER - The invention concerns a method for reducing mechanical oscillation in a wind power plant which comprises a plurality of rotor blades, a wind turbine drive train and a generator, wherein the rotor blades are rotatably connected to the generator by the wind turbine drive train. The method comprises the steps: mathematically modeling the dynamical response and/or transfer function of a group of rotatable parts of the wind power plant, the group of rotatable parts comprising at least the wind turbine drive train, and determining dynamical response and/or transfer function of the group; in operation of the wind power plant, determining a first parameter characteristic of the mechanical oscillation at a first location, controlling the operation of at least one rotatable part in response to the dynamical response and/or transfer function of the group and at least the first parameter. In effect, resonance induced mechanical wear is reduced which leads to an increased life time of the wind power plant.09-17-2009
20120200087Management System for Operating a Wind Energy Plant and Method Using the Management System - A management system for a wind energy plant including at least one control unit, and a method using the management system are disclosed. The management system is used to coordinate component modules of the wind energy plant with vibration damping modules and/or load reduction modules, wherein a sensor system supplies data of the operating states of the component modules for a system analysis. For this purpose, reactive vibrations and/or predictive forecasts of vibrations of the wind energy plant, and predictive disturbance variables are registered, and the vibration damping modules and/or load reduction modules in the control unit are activated, wherein an actuator carries out damping measures and/or load reduction measures on the component modules in accordance with the vibration damping modules and/or load reduction modules of the control unit.08-09-2012
20120200086METHOD AND SYSTEM FOR CONTROLLING WIND FARM WHEN WIND SPEED VARIES ABRUPTLY - The present invention relates to a method and system for controlling a wind farm when a ramp up or ramp down rate of the wind farm does not satisfy a grid-code or corresponding criteria due to an abrupt change in wind speed. The method and system for controlling a wind farm includes the steps of measuring speed and direction of wind performed outside the wind farm, sequentially controlling wind turbines if the wind speed abruptly changes considering a time for the wind to arrive at the wind turbines, determining the number of wind turbines to be controlled simultaneously so that the wind farm may satisfy the grid-code at this point, grouping the wind turbines, determining a control sequence and a control time of each group, and adjusting a control end time if stopping times of adjacent groups are overlapped when the wind turbines are stopped.08-09-2012
20080284171Augmented wind power generation system using an antecedent atmospheric sensor and method of operation - A wind power generating apparatus is provided. The apparatus includes a plurality of vertically stacked wind acceleration modules. The apparatus further includes a rotor assembly, an electrical generator mechanically coupled to the rotor assembly, and a sensor in communication with the electrical generator. The sensor is capable of sensing a characteristic of wind prior to the wind reaching the rotor assembly and the electrical generator is capable of adjusting its operation according to the wind characteristic sensed by the sensor. The sensor may be coupled to a controller, which may control the operation of the electrical generator according to a signal from the sensor. The electrical generator may include a continuously variable transmission and the controller may adjust the ratio of the rotational speeds of the transmission input and output according to the sensed wind characteristic.11-20-2008
20090021013WIND POWER SYSTEM AND METHOD OF OPERATING IT - The wind power system comprises an installation (01-22-2009
20110254272CYCLOID REDUCTION GEAR FOR WIND FORCE GENERATOR - A cycloid reduction gear for a wind force generator is provided. The wind force generator having generation blades and horizontal and vertical axes includes: a horizontal-axis reduction gear provided in a direction perpendicular to the vertical axis to rotate the generation blades in a horizontal direction; and a horizontal-axis rotation ring gear installed at the vertical axis and internally contacting with the horizontal axis reduction gear to rotate the vertical axis in a horizontal direction according to a rotation of the horizontal axis reduction gear. Thereby, the horizontal axis of the wind force generator can rotate according to a wind direction, and by combining and installing a reduction gear and a cycloid disk in the wind force generator, the horizontal axis moves in an appropriate reduced ratio and thus the wind force generator can stably operate according to a wind direction.10-20-2011
20130168963CONTROL OF ELECTRIC OUTPUT OF A WIND PARK - A method of controlling an electric output of a wind park is carried out jointly by wind turbines with their local wind-turbine controllers and a central wind-park controller. The central wind-park controller generates a reference value for a wind turbine, based on the measured value of an electric quantity at a point of common measurement, and provides it to the local wind-turbine controller. The local wind-turbine controller produces a voltage or a reactive-power in the electric grid at the location of the wind turbine corresponding to the reference value, but which is corrected by a local correction. The local correction takes into ac count a voltage or a reactive-power change expected at the point of common measurement for the electric current supplied by the wind turbine due to the electric impedance of the grid connection to the point of common measurement.07-04-2013
20120169051Emergency Adjustment Device for Blade Pitch Adjustment Systems for Wind Energy Installations - An adjusting device for rotor blades of a wind power plant is disclosed. An AC motor is provided for adjusting the angle setting of the rotor blades. An input serves for receiving an input alternating current. A frequency converter is provided for generating a second alternating current having a second frequency, wherein the second alternating current drives the AC motor. Additionally, a DC voltage source and an inverter are provided for converting the voltage provided by the DC voltage source into an alternating current for the AC motor. The inverter is thereby separated from the frequency inverter.07-05-2012
20110163546METHOD FOR OPERATING A POWER DISSIPATING UNIT IN A WIND TURBINE - A variable speed wind turbine is provided. The wind turbine comprises a generator, a power converter for converting at least a portion of electrical power generated by the generator wherein the power converter comprises a generator side converter, a grid side converter and a DC (direct current) link therebetween, a power dissipating unit operatively coupled to the DC link and a controller. The controller is adapted to determine a DC link voltage error signal, the DC link voltage error signal being the difference between a function of an actual DC link voltage and a function of a predefined reference DC link voltage, determine a DC link error power based on the DC link voltage error signal, determine a feed forward power and generate a duty ratio for operating the power dissipating unit based on the DC link error power and the feed forward power.07-07-2011
20110163544METHOD FOR OPERATING A POWER DISSIPATING UNIT IN A WIND TURBINE - A variable speed wind turbine is provided. The wind turbine comprises a generator, a power converter for converting at least a portion of electrical power generated by the generator wherein the power converter comprises a generator side converter, a grid side converter and a DC (direct current) link therebetween, a power dissipating unit operatively coupled to the DC link and a controller. The controller is adapted to determine a DC link voltage error signal, the DC link voltage error signal being the difference between a function of an actual DC link voltage and a function of a predefined reference DC link voltage, determine a DC link error power based on the DC link voltage error signal, determine a feed forward power and generate a duty ratio for operating the power dissipating unit based on the DC link error power and the feed forward power.07-07-2011
20110163545WIND TURBINE FOR WIND POWER GENERATION - A wind turbine for wind power generation accommodated a heat-generating device therein is always properly cooled by accurately detecting clogging of a filter. A wind turbine accommodates a heat-generating device and includes a column disposed in an upright position on a foundation, a nacelle disposed on a top end of the column, and a rotor head supported by the nacelle so as to be rotatable about a substantially horizontal axis, and the wind turbine includes an intake which is provided in an outer surface of the wind turbine and through which outside air is taken into the wind turbine to cool the heat-generating device; an exhaust which is provided in the outer surface of the wind turbine and through which air inside the wind turbine is discharged outside the wind turbine; an impurity-removing mechanism disposed in a flow path of air from the intake to the exhaust to remove impurities contained in the outside air; and a control unit for determining the condition of the impurity-removing mechanism by comparing, as a parameter serving as a criterion for determining the condition of the impurity-removing mechanism, latest data obtained while a wind speed outside the wind turbine is substantially stable with reference value data input in advance and serving as a reference.07-07-2011
20110163543SIGNAL LINE WIRING IN NACELLE OF WIND TURBINE GENERATOR - A wind turbine generator includes: a nacelle provided with a plurality of modules; a controller provided in a first module out of the plurality of modules; a first device provided in a second module out of the plurality of modules. The controller and the first device are connected with a device-side connection mechanism and a controller-side connection mechanism to allow electrical communications between the controller and the first device. The device-side connection mechanism includes: a first connection element; and a first multicore cable including a plurality of signal lines with one end connected to the controller and the other end connected to the first connection element. The device-side connection mechanism provides an electrical connection between the first connection element and the first device.07-07-2011
20130119662WIND TURBINE CONTROL - Wind turbine systems and methods are provided. The wind turbine system includes a plurality of coaxial, counter-rotating turbine assemblies. First and second shroud assemblies define a generally spherical volume containing the first and second turbine assemblies. The first and second shroud assemblies each include a shroud member that is controlled in response to information from a wind sensor to selectively shield or expose portions of the respective turbine assemblies to the wind by changing the rotational position of the shroud members about the system axis. The turbine assemblies are interconnected to a generator for the production of electrical power.05-16-2013
20110133461Operating Wind Turbines Under Converter Faults - A wind turbine is arranged to operate in a fully-functional converter mode and a faulty-converter mode. A plurality of converters are arranged to share electric current in the fully-functional converter mode. The converters are dimensioned not only to operate at nominal active current but to provide an over-current margin to enable reactive current to be produced on top of the nominal active current in the fully-functional converter mode. In the fully-functional converter mode the converters are caused to produce reactive current on top of the nominal active current. In response to a fault of one or more of the converters, operation is changed from the fully-functional converter mode to the faulty-converter mode. In the faulty-converter mode, one or more other converters of the converter system are caused to produce additional active current by using their over-current margin to compensate at least partly for a reduction of active-current production due to the fault of one of the converters, and to reduce the reactive-current production by the other converter correspondingly.06-09-2011
20100283246WIND TURBINE - A method of controlling a wind turbine having a rotor and a generator for producing power, the wind turbine being designed for a nominal load, the method comprising the steps of: determining a current load acting on at least a part of the wind turbine; calculating a load error, the load error representing the difference between the nominal load and the current load; controlling the wind turbine based on the load error; wherein the step of controlling the wind turbine comprises altering a parameter of the wind turbine so that the power or torque produced by the generator is altered.11-11-2010
20100283247CONTROL DEVICE FOR WIND POWER SYSTEMS HAVING POWER FAILURE DETECTION - A wind energy installation control device includes a wind rotor, a generator driven by the wind rotor, a torque control unit configured to control a torque of the generator, and a control system. The control system includes a detector configured to identify a grid dip and an end of the grid dip, a residual torque transmitter configured to provide a preset value for a torque of the generator after identification of the grid dip, and an initializer configured to initialize a component of the torque control unit at the preset value. Accordingly, upon return of grid power after a grid dip, the vibration behaviour of a wind power system can be significantly improved. Overload of a drive train upon return of grid voltage can thus be reduced.11-11-2010
20100283244Energy Generation and Storage System - A power generation and storage apparatus and method is provided. The apparatus includes a power generation assembly and an energy storage assembly operably coupled to the power generation assembly. The energy storage assembly includes a buoyant device and is configured to store energy by lowering the buoyant device to a lower depth of water, and to release energy by allowing the buoyant device to rise to a higher depth of water.11-11-2010
20110001319DIAGNOSIS OF PITCH AND LOAD DEFECTS - The invention relates to a method, system and computer readable code for diagnosis of pitch and/or load defects of e.g. wind turbines as well as wind turbines using said diagnosis method and/or comprising said diagnosis system.01-06-2011
20110133459RETRO-FITTING A WIND ENERGY CONVERTER - A method for retro-fitting wind-energy conversion system includes disconnecting a first set of multiple windings from active circuitry; shorting together the first set of multiple windings; and connecting a second set of multiple windings to the active circuitry.06-09-2011
20110133455WIND TURBINE CABLE TWIST PREVENTION - A wind turbine having a nacelle, includes a Global Positioning System (“GPS”) sensor for determining a rotational displacement of the nacelle of the wind turbine.06-09-2011
20120061964POWER PLANT CONTROL SYSTEM AND METHOD FOR INFLUENCING HIGH VOLTAGE CHARACTERISTICS - A control system for a power plant is provided, configured to influence actual HV characteristics of an HV power line at a point-of-interconnection to a grid. The control system includes an MV-compliant measurement system configured for connection with an MV power line of the power plant, and an evaluation unit. The evaluation unit is connected to the MV-compliant measurement system and is configured to determine calculated HV characteristics of the HV power line based on measurement values received from the MV-compliant measurement system at the MV power line and based on a model of a transformer. The transformer transforms from medium voltage on the MV power line to high voltage on the HV power line. The evaluation unit is configured to generate a control signal based on the calculated HV characteristics in order to control the power plant for influencing the actual HV characteristics of the HV power line.03-15-2012
20110133460Control system and method for wind power generation plant - A control system and method for a wind power generation plant including one or more turbines disposed on an axis of rotation in a housing with walls formed by selectively adjustable louver panels is provided.06-09-2011
20110133454POWER GENERATION DEVICE - A portable power generation device includes a housing, an articulated cover, and a first device including rotor blades for producing electrical energy when exposed to a flow of air, the first device is adapted to be articulated between a range from a first stored position, wherein the rotor blades of the first device are disposed within the housing, and a second deployed position, wherein the rotor blades of the first device are disposed outside of the housing. The power generation device also includes a second device for producing electrical energy when exposed to a source of radiant light.06-09-2011
20110133453MULTIPLE GENERATOR WIND TURBINE AND METHOD OF OPERATION THEREOF - A wind turbine and method of operation thereof uses a plurality of generators and a controller to control the operation of the turbine based on various parameters. The generators are each smaller than the total power capacity of the turbine and the controller adds more generators or removes generators based on the speed of the rotor. The controller loads and unloads the generators, which rotate continuously when the wind turbine is operating.06-09-2011
20110018270DOUBLY-CONTROLLED ASYNCHRONOUS GENERATOR - An electric power generator system or a motor comprising a doubly-fed asynchronous generator or motor comprising a stator and a rotor; a transformer having a first winding and a second winding, the first winding having a first end and a second end; and wherein the stator and the transformer are connectable in series with an electric power distribution grid.01-27-2011
20110018269WIND TURBINE - A wind turbine system is provided to generate electricity from wind energy. The system locates generator at a bottom portion of the tower. The system rotates either the entire tower, or the nacelle and the generator simultaneously. A flexible power transfer member inside the tower connects a top rotation transfer member and the bottom rotation transfer member to transfer wind energy captured by the turbine rotor from the top rotation transfer member to the bottom rotation transfer member. A pitch mechanism to rotate the rotor blades in a desired angular position about the rotor blades longitudinal axis is also provided.01-27-2011
20110018268WIND TURBINE AND ROTOR BLADE WITH REDUCED LOAD FLUCTUATIONS - A wind turbine includes a rotor having a number of rotor blades. At least one rotor blade has openings. The rotor blade has air-displacement elements which, in use, alternately force air out of and into the openings. A sensor is provided for detecting wind speed fluctuations. A control unit is provided for controlling the air-displacement elements depending on the wind speed fluctuations detected by the sensor. The rotor blade has an aerodynamic profile with a suction side and a pressure side. At least one opening is provided on the suction side. The control unit is designed for operating the air-displacement elements of the opening on the suction side if the sensor has detected a positive speed fluctuation. At least one opening is provided on the pressure side. The control unit is designed for operating the air-displacement element of the opening on the pressure side if the sensor has detected a negative speed fluctuation.01-27-2011
20110133457SYSTEM, DEVICE, AND METHOD FOR WIND TURBINE LOAD REDUCTION IN A COLD WEATHER ENVIRONMENT - A method for controlling an operation of a wind turbine. A meteorological condition is received from a meteorological sensor. An operating threshold value is calculated at least in part by applying a continuous function to the meteorological condition. An operation of the wind turbine is controlled based at least in part on the calculated operating threshold value. For example, the wind turbine may be disabled if a current wind speed exceeds a maximum wind speed that is calculated based on an ambient air temperature or ambient air density.06-09-2011
20120146333Systems for Load Reduction in a Tower of an Idled Wind-Power Unit and Methods Thereof - Systems and methods for reducing dynamic loading in an idled wind power unit include sensing at least one parameter indicative of dynamic loading and executing a reduced torque brake mode, which may comprise a controlled brake and brake-release sequence, with the turbine braking system when the sensed parameter exceeds a selected value. The reduced torque brake mode absorbs energy and reduces dynamic loading thereby.06-14-2012
20110080001Method for controlling a wind turbine at high thermal loads - A method of controlling a temperature of a component of a wind turbine is disclosed. A set point temperature of the component is defined. The actual temperature of the component is determined and compared with the defined set point temperature. The actual temperature of the component is controlled by controlling the output power of the wind turbine based on the result of comparison.04-07-2011
20110095532Method for operating a wind power plant having a doubly-fed asynchronous machine and wind power plant having a doubly-fed asynchronous machine - A method for operating a wind energy plant having a doubly-fed asynchronous machine, a grid-sided converter and a generator-sided converter both being controlled by a control means.04-28-2011
20110095531Wind generator with energy enhancer element for providing energy at no wind and low wind conditions - The present invention is a new and novel wind generator system particularly suitable for small wind applications that harnesses low velocity wind effectively. In a preferred embodiment of the invention, the wind generator system comprises a drive shaft; one or more retreating blades and one or more advancing blades attached to the drive shaft and extending radially outwardly therefrom; a generator assembly coupled to the drive shaft and effective for generating electrical power; and a housing having an inner chamber for receiving the blades and a wind directional apparatus that operates to adjust the speed of the wind and to channel wind along a desired flow pathway towards the one or more of the retreating blades and blocks airflow from impinging on one or more advancing blades.04-28-2011
20100213712WIND TURBINE GENERATOR - An object is to improve the operating rate. A first switch is provided in a power line connecting a power generator to a power system, and a second switch that can be opened and closed by remote control is provided in the power line between the power generator and the first switch. In the second switch, a withstand current capability is set that allows current flowing in a low-voltage event and that withstands current having a value equal to or less than a current value specified by the thermal setting of the power generator. In the first switch, a withstand current capability is set that is superior to the withstand current capability of the second switch and that withstands current having a value equal to or less than the current value specified by the thermal setting of the power generator.08-26-2010
20100176593Wind Generator - The wind generator includes a propeller, a speed sensor, a processor, at least two generators and a distributor. When the speed sensor detects that a wind speed or rotation-speed of a generator exceeds a threshold, the other generator joins to be in cooperation with it for reducing rotation-speed of the generators and increasing wind generation. Similarly, additional generators join to be in cooperation if rotation-speed of the propeller is still overhigh. No more generators join to cooperate if the rotation-speed is under the threshold.07-15-2010
20110260454DEVICE FOR CONTROLLING A DOUBLE-FED ASYNCHRONOUS MACHINE - The invention relates to a device and method for controlling a double-fed asynchronous machine (10-27-2011
20100320762WIND ENERGY INSTALLATION HAVING A DOUBLE-ENERGIZED ASYNCHRONOUS GENERATOR AND CONVERTER CONTROL - A method for controlling a converter of a wind energy installation. The converter is connected to the rotor of a doubly-fed asynchronous generator in order to feed electrical power into an electrical grid and comprises a generator-side inverter, a grid-side inverter, and at least one converter regulator for regulating and/or controlling current output from at least one of the inverters to the doubly-fed asynchronous generator and/or to the electrical grid. The method includes detecting a change in output real power, determining whether the detected change satisfies a predefined condition, and changing a nominal value of reactive power to be output in an opposite sense to a change in real power at the grid-side inverter and in a same sense as the generator-side inverter when the predefined condition is satisfied.12-23-2010
20100078939SYSTEM AND METHOD FOR CONTROLLING A WIND TURBINE DURING LOSS OF GRID POWER AND CHANGING WIND CONDITIONS - An apparatus and method for controlling a wind turbine having a plurality of blades such that the blade angle of each blade is continuously adjusted during loss of grid power relative to a wind direction relative to an orientation of the nacelle (i.e., yaw offset) and a rotor azimuth while keeping the orientation of the nacelle of the wind turbine substantially constant. The wind turbine is capable of pitching the blades a full 360 degrees and generating power from the rotation of the rotor shaft during loss of grid power.04-01-2010
20100320761METHOD FOR THE OPERATION OF A WIND TURBINE, AND WIND TURBINE FOR CARRYING OUT THIS METHOD - A method of operating a wind turbine, comprising the steps of measuring a meteorological value and using the measured meteorological value to preset a desired value for the turbine operation, to select an operation condition and/or to determine a boundary condition for the turbine operation, wherein the measured meteorological value is an air mass flow caused by the wind.12-23-2010
20100320760Solar and Wind Power Generator Capable of Tracking Sunlight Automatically - A solar and wind power generator capable of tracking sunlight automatically is provided. The solar and wind power generator includes a base, a revolving column, a generator, a plurality of wind-collecting portions, a plurality of photovoltaic panels, and a secondary cell. The generator is disposed in the base. A wind-collecting element of each wind-collecting portion is coupled to the revolving column by a rotor brake. The revolving column is coupled to the generator. The wind-collecting elements, when driven by wind, rotate the revolving column so as for the generator to generate electric power. The photovoltaic panels are arranged on the wind-collecting elements to absorb sunlight and thereby generate electric power. Electric power generated by the generator and the photovoltaic panels is stored in the secondary cell. Inclination angles of the wind-collecting elements are adjustable by the rotor brakes, allowing the photovoltaic panels to face the sun and track sunlight automatically.12-23-2010
20100060000WIND TURBINE HAVING A MAIN POWER CONVERTER AND AN AUXILIARY POWER CONVERTER AND A METHOD FOR THE CONTROL THEREOF - A wind turbine comprising a main generator, a main power converter connected to the main generator and adapted to convert the electrical output power of the main generator to an electrical power to be fed into the utility grid up to a first rated converter output power and an auxiliary power converter connected to the main generator and adapted to convert the electrical output power of the main generator to an electrical power up to a second rated converter output power which is lower than the first rated converter output power is provided. Further, a control architecture for controlling the power balance of a wind turbine and a method for operating a wind turbine are provided.03-11-2010
20100060003MOMENTUM-CONSERVING WIND-DRIVEN ELECTRICAL GENERATOR - Wind-driven electrical generators will slow and lose kinetic energy when the wind slows or stops. When the wind slows or stops, kinetic energy in the rotating turbine and other rotating components that would otherwise be lost, is conserved by supplying a supplemental mechanical energy to the rotating components using a battery-powered motor. The electrical power for the drive motor is obtained from solar-charged batteries. In an alternate embodiment, solar cells provide all of the energy for the drive motor.03-11-2010
20090284012Tower Construction for a Wind Turbine - A handling system for a wind turbine nacelle in connection with self-loading or self-unloading of the nacelle to or from a vehicle. The system comprises two or more lifting apparatus, where the lifting apparatus are engaged with lifting areas of a load carrying structure of the nacelle. The lifting areas are a part of the load carrying structure or are integrated in the load carrying structure, and where the lifting apparatus lifts by applying linear force to the load carrying structure of the nacelle. The invention further relates to a method for vertical displacement of a wind turbine nacelle and a wind turbine nacelle prepared for self-loading or self-unloading to or from a vehicle.11-19-2009
20110148110Monitoring of blade frequencies of a wind turbine - A method for monitoring blade frequencies of a wind turbine and a monitoring system are provided. An accelerometer is attached to a rotating hub of a wind turbine measuring vibrations of the hub. To extract vibration signals originating from each blade, the vibration signals are combined with measuring signals from the azimuth angle sensor. Alternatively, the azimuth angle is found by using the measured accelerations in two directions representing the centrifugal forces and vibrating forces of the hub and feeding these signals into a phase locked loop unit establishing a phase of the rotating hub representing the azimuth angle. To extract each blade frequency, a Fast Fourier Transformation is used on the signals from the accelerometer. To monitor a severe change in each blade frequency, each blade frequency is compared to other blade frequencies and an alarm is set when a given level is reached and the wind turbine is stopped.06-23-2011
20110187107WIND TURBINE GENERATOR AND METHOD OF CONTROLLING THE WIND TURBINE GENERATOR - A wind turbine generator capable of easily stopping wind turbine blades at an appropriate position in a short time is provided. A pitch control device controls the pitch angle to a feather side to reduce the rotational speed of the wind turbine blades to a predetermined speed upon receiving a stop signal instructing stopping the rotation of the wind turbine blades, and, on the basis of a detection result of an angle detection device, a brake disc and a brake device are driven and controlled so that the rotation of the wind turbine blades is stopped at a desired position.08-04-2011
20110187106WIND-TURBINE-GENERATOR CONTROL SYSTEM, WIND FARM, AND WIND-TURBINE-GENERATOR CONTROL METHOD - A wind-turbine control system is provided for each of a plurality of wind turbine generators constituting a wind farm, sends wind-turbine data about a controlled wind turbine generator to the wind-turbine control systems provided for the other wind turbine generators, and receives wind-turbine data about the other wind turbine generators from the wind-turbine control systems provided for the other wind turbine generators. Then, the wind-turbine control system controls the controlled wind turbine generator based on the wind-turbine data about the controlled wind turbine generator and the wind-turbine data about the other wind turbine generators. Therefore, the control of the wind turbine generators constituting the wind farm can be changed more swiftly according to the operational condition of the wind farm.08-04-2011
20110187103WIND TURBINE GENERATOR SYSTEM AND METHOD OF CONTROLLING OUTPUT OF THE SAME - It is an object to supply, to the utmost extent, reactive power according to a demand of a utility grid side while maintaining the power factor within a predetermined range. The wind turbine generator system includes a main controller 08-04-2011
20110215577WIND TURBINE CONTROL METHODS FOR IMPROVING THE PRODUCTION OF ENERGY RECOVERING ENERGY LOSSES - Method of operation of a variable speed wind turbine (09-08-2011
20100025994INTRA-AREA MASTER REACTIVE CONTROLLER FOR TIGHTLY COUPLED WINDFARMS - A wind turbine generator control system is provided for controlling output of a plurality of tightly-coupled windfarms connected at a point of common coupling with a power system grid. A master reactive control device employs algorithms whose technical effect is to coordinate the real power, reactive power and voltage output of the multiple windfarms. The controller incorporates a reactive power regulator that can be used to regulate reactive power, power factor or voltage at the point of common coupling and an active power regulator that can be used to regulate real power at the point of common coupling; such that each windfarm is not asked to contribute or violate its own operating capability.02-04-2010
20100025997METHOD OF OPERATING A WIND POWER INSTALLATION AND A WIND POWER INSTALLATION - The present invention concerns a method of operating a wind power installation comprising an electric generator drivable by a rotor for outputting electrical power to an electrical consumer, in particular an electrical network.02-04-2010
20100025996WAVE AND WIND POWER GENERATION - The present invention provides a wave and wind power generation system including a platform (02-04-2010
20110001318Frequency-Responsive Wind Turbine Output Control - A wind farm (01-06-2011
20110025059Power Management During Grid Faults - A method for operating a wind turbine facility during for example a grid fault, the wind turbine facility comprising a power dissipation/storage being adapted to dissipate or store electrical energy exceeding an amount to be delivered to an associated power supply grid during the grid fault. The method includes operating the wind turbine facility in accordance with an allowed amount of electrical energy that can be dissipated or stored in the power dissipation/storage of the wind turbine facility by ensuring that a total amount of electrical energy generated by the wind turbine facility does not exceed a sum of the allowed amount and the amount to be delivered to the power supply grid.02-03-2011
20090039651Method for wind turbine yaw control - A method for yaw control for a wind turbine comprising a rotor with a rotor blade, the rotor defining a rotor axis and a rotor plane to which the rotor axis is perpendicular, in which the rotor axis is turned to minimise the yaw angle between the ambient wind direction and the rotor axis is provided, wherein the turning of the rotor axis is performed based on the measurement of a wind speed in the rotor plane at the rotor blade. Furthermore, a wind turbine which comprises a rotor which includes a rotor axis and a rotor plane perpendicular to the rotor axis and an anemometer for measuring the ambient wind speed is provided. The wind turbine further comprises an anemometer which is located such at a rotor blade at a particular distance from the rotor axis as to allow for measuring a wind speed in the rotor plane.02-12-2009
20090278352DYNAMIC ELECTRIC BRAKE FOR A VARIABLE SPEED WIND TURBINE HAVING AN EXCITER MACHINE AND A POWER CONVERTER NOT CONNECTED TO THE GRID - A variable speed wind turbine having a doubly fed induction generator (DFIG), includes an exciter machine mechanically coupled to the DFIG and a power converter placed between a rotor of the DFIG and the exciter machine. Thus, the power converter is not directly connected to the grid avoiding the introduction of undesired harmonic distortion and achieving a better power quality fed into the utility grid. Moreover, the variable speed wind turbine includes a power control and a pitch regulation.11-12-2009
20080272596WIND TURBINE VARIABLE SPEED TRANSMISSION - A wind turbine variable speed transmission is provided. The wind turbine includes a rotor, an RPM amplifier coupled to the rotor and a variable speed transmission clutch coupled to the RPM amplifier. The wind turbine further includes a generator coupled to the variable speed transmission clutch and configured to generate power from a rotation of the rotor.11-06-2008
20100045038Method for the Damping of Tower Oscillations in Wind Power Installations - A method for controlling a wind turbine installation for the damping tower oscillations, in particular a buoyant wind turbine installation comprising a buoyant body, a tower arranged over the buoyant body, a generator mounted on the tower that is rotatable in relation to the wind direction and fitted with a wind turbine, and an anchor line arrangement connected to anchors or foundations on the sea bed. The tower oscillations are damped by the control with the blade angle controller in the constant power or RPM range of the wind turbine being performed by the rotor velocity (which is the input to the blade angle controller) being estimated in an estimator for the wind turbine. The input to the wind turbine estimator is the estimated incoming wind, so that the tower movements are not visible to the blade angle controller. Negative damping is thus not introduced into the system and the tower oscillations will be expediently damped, while there is also less variation in blade angle, thrust on the rotor and power supplied.02-25-2010
20120098263WIND ENERGY PLANT AND DRIVE DEVICE FOR ADJUSTING A ROTOR BLADE - The invention relates to a wind energy plant comprising a rotor having a rotor hub which is mounted on a gondola and a plurality of rotor blades. An electric generator is connected to the rotor. The invention also relates to an electric drive device which is designed as a direct drive and used to adjust a rotor blade which is arranged in a concentric manner on the rotor hub in relation to rotor blade bearing and a permanently excited synchronous motor. A stator of the synchronous motor comprises a coil body which is mounted on the motor hub. A rotor of the synchronous motor is arranged at an axial distance with respect to the stator for forming an axially extending air gap. Said rotor also comprises a permanent magnet arrangement on a support plate which is connected to a rotor blade shaft.04-26-2012
20110148113VIBRATION DAMPING OF WIND TURBINE SHAFT - A damper which effectively dampens vibrations experienced by a shaft in a drive train of a wind turbine generator, such as a main shaft of the WTG, is disclosed. The damper includes a vibration sensor adapted to provide a vibration signal in response to the vibrations of the shaft, an electromagnet adapted to provide an electromagnetic force to the shaft, and a controller operably coupled to the vibration sensor and the electromagnet. The controller is adapted to generate command signals to provide a suitable drive current to the electromagnet in response to the vibration signal, and the electromagnet is adapted to provide an electromagnetic force to the shaft and thereby actively dampen the vibrations of the shaft.06-23-2011
20120032442BLADE ANGLE ADJUSTMENT DRIVE FOR A WIND POWER PLANT - A blade angle adjustment drive for a wind power plant having an electrical converter, an electric motor electrically coupled to the converter, and a monitoring unit which monitors the operation of the converter and identifies a malfunction in the operation of the converter. The operation of the converter may be interrupted at least temporarily based on the malfunction. An interruption prevention unit is selectively operable to prevent an interruption in the operation of the converter by the monitoring unit when the bade angle adjustment drive is in an emergency operation state.02-09-2012
20110304140WIND TURBINE GENERATOR AND SOUNDNESS DIAGNOSIS METHOD THEREOF - An accumulator is provided in an oil circuit of the pressure supply device and has a gas chamber for storing the pressure generated by the oil pump. A gas pressure judgment unit judges a soundness on the gas pressure of the gas chamber of the accumulator. A pitch movement judgment unit judges whether the pitch movement is performed soundly by the oil pressure accumulated in the accumulator if the gas pressure judgment unit judges that the gas pressure is sound. A start judgment unit judges a start condition to start the gas pressure judgment unit every predetermined period or when a start switch is operated.12-15-2011
20110304142FACILITY FOR PRODUCING ELECTRICAL ENERGY FROM WIND - A facility for producing electrical energy has a plurality of shrouds, a plurality of wind turbines, a power system, a plurality of modules, a pivotal mounting system, and a support structure. Each shroud has a throat which increases the velocity of the prevailing wind passing through the shroud. The plurality of wind turbines are each operably positioned in the throat of one of the plurality of shrouds. The power system is adapted for converting mechanical energy from the plurality of wind turbines to electrical energy. The support tower includes a central tower for supporting the shrouds and wind turbines above the surface, and may further include peripheral towers, guys, and/or other structural components.12-15-2011
20110304141AC-CONNECTION OF AN OFF-SHORE WIND-PARK TO AN ON-SHORE ELECTRICITY GRID AND BOOSTER TRANSFORMER FOR SUCH AN AC-CONNECTION - The present invention relates to a method for switching-in an electricity grid of an off-shore wind park to an on-shore electricity grid, to a booster transformer modified for switching-in an electricity grid of an off-shore wind park to an on-shore electricity grid and to an AC-connection for operating an electricity grid of an off-shore wind-park switched-in to an on-shore electricity grid.12-15-2011
20090121484Wind energy conversion using the magnus effect - The invention comprises a wind energy conversion device. It is able to convert a far greater percentage of the pressure energy of the wind into electricity than by using an airfoil or even a sail. A Flettner Rotor is mounted atop special support structure which is far enough away from the Rotor to minimize turbulence around the Rotor. Thus the performance of the Rotor is enhanced. Energy conversion occurs as the Rotor is made to operate gears attached to an electric generator.05-14-2009
20110140418WIND TURBINE GENERATOR - A wind turbine generator capable of preventing a salt damage and reducing noise as well as easily starting in a cold region is provided. The wind turbine generator includes a nacelle (06-16-2011
20120306202Wind Power Generation System and Method for Additional Installation of Wind Power Generator Therein - The present invention provides a wind power generation system capable of suppressing an increase in output variation involved in additional installation of a wind power generator without the need for a large storage battery capacity. For example, an output variation rate at a predetermined period of an existing wind power generator in an existing wind-power generating station is determined in advance, and charge/discharge control for a storage battery device is performed to reduce an output variation in a system output of the existing wind power generator so that an output variation rate of the wind-power generating system after the additional installation of the wind power generator does not exceed the determined output variation rate of the existing wind power generator.12-06-2012
20120306203METHOD FOR OPERATING A WIND TURBINE IN THE EVENT OF A GRID ERROR AND A WIND TURBINE FOR CARRYING OUT SAID METHOD - The invention is directed to a method for operating a wind turbine in the event of a grid error. The wind turbine has a rotor having a rotor blade adjustable in its blade pitch angle, a generator and a unit for capturing an actual value of the rotational speed of the generator, a value of the blade pitch angle and an actual value of a variable which is representative of a generator torque. The method includes recognizing a grid error; capturing the actual value of the generator torque and actual value of rotational speed of the generator when a grid error was recognized; determining a change in torque; capturing the pitch angle; determining a corrective value for the pitch angle in dependence upon the change in the generator torque and the value for the pitch angle; and, determining a corrected set-point for the pitch angle.12-06-2012
20120306204METHOD AND CONTROL ARRANGEMENT FOR CONTROLLING A REACTIVE POWER SOURCE - The present invention relates to a method for controlling a reactive power source in a wind power plant, the method comprising the steps of providing a wind turbine reactive power control signal and providing an active power reference signal, said active power reference signal being a measure of an active power production of the wind power plant. A control signal for the reactive power source is generated by combining the wind turbine reactive power control signal and the active power reference signal in such a way that the control signal for the reactive power source becomes a weighted signal of the wind turbine reactive power control signal. Moreover, the present invention relates to control units and wind power plants suitable for carrying out the present invention.12-06-2012
20120205913WIND TURBINE CONTROL METHODS FOR IMPROVING THE PRODUCTION OF ENERGY - Method of operation of a variable speed wind turbine (08-16-2012
20080290662Climatisation system for wind turbines - A climatisation system for wind turbines which comprise: a first heat exchanger (11-27-2008
20120038157Synchronous Induced Wind Power Generation System - A synchronous induced wind power generation system is provided, comprised of a horizontally rotatable turbine-generator section that wind vanes into the prevailing wind direction. The turbine-generator section has a horizontally disposed turbine shaft therein, and air induction shrouds at either end thereof, the anterior areas of the air induction shrouds having larger areas than the interior area of the turbine-generator section, so as to induce a larger differential air pressure across the turbine. The turbine is directly coupled to a synchronous AC generator that is synchronized with an external power line in connection therewith, and directly generates synchronous AC power. Further, turbine magnetic brakes and/or adjustable pitch directrix blades are employed to control the speed of rotation of the turbine 1) during synchronization with the electrical line, 2) to modulate turbine power, and 3) to protect against overspeed during high wind and loss of load.02-16-2012
20120038155STEP UP CONVERTER FOR A WIND POWER PLANT - The present invention relates to a back-up power system 02-16-2012
20120038154METHOD AND APPARATUS FOR POWERING A WIND TURBINE - The invention related to a method for powering a wind turbine following a grid voltage failures. After the presence of grid power has been once again detected, the Grid Connection Control System (GCCS) is then powered by an Uninterruptable Power Supply (UPS). The GCCS closes the grid switch that had been powering the power protection equipment.02-16-2012
20090273186WINDMILL UTILIZING A FLUID DRIVEN PUMP - A windmill apparatus includes tower, a tower-mounted hydraulic pump driven by windmill blades, and hydraulic lines connected to a ground storage tank and to a number of separate generator units. Each generator unit includes a hydraulic pump and an electrical generator. In operation, upon startup, as the wind propels the propeller-driven pump the hydraulic fluid circulates freely until a pre-set pressure is achieved, upon which a diverter valve diverts all the fluid pressure to the first generator unit. When the first generator unit is powered sufficiently to achieve a stable output voltage, a subsequent one of the remaining generator units is powered up until its output voltage is stabilized, with this process continuing as long as there is a surplus of hydraulic power available to power up additional units to take full advantage of all of the available wind power.11-05-2009
20120038156ELECTRICAL ENERGY GENERATING INSTALLATION DRIVEN AT VARIABLE ROTATIONAL SPEEDS, WITH A CONSTANT OUTPUT FREQUENCY, ESPECIALLY A WIND POWER INSTALLATION - An energy generating installation, especially a wind power station, includes a drive shaft connected to a rotor (02-16-2012
20120061957METHOD FOR OPERATING A WIND TURBINE IN A POWER-REDUCED MODE OF OPERATION - A method of operating a wind turbine. A rain sensor and a control unit are configured to control the operation of the wind turbine. The wind turbine has a power-reduced mode of operation and a non-power-reduced mode of operation. In the power-reduced mode of operation a noise emitted by the wind turbine is lower than in the non-power-reduced mode of operation. Precipitation is detected by the rain sensor. A signal representative of the precipitation is generated and transmitted. The signal representative of the precipitation is received by the control unit. One mode of operation is selected from one of the power-reduced mode of operation and the non-power-reduced mode of operation, depending on the signal representative of the precipitation by the control unit. The wind turbine is controlled by the control unit to operate in the selected mode of operation.03-15-2012
20120061966WIND POWER GENERATION CONTROL DEVICE AND WIND POWER GENERATION CONTROL METHOD - A wind power generation control device which controls a wind power generator using a wind turbine blade having a fixed pitch angle is provided. The wind power generation control device which controls the wind power generator in which an output current value outputted by the wind power generator is detected, an output voltage value outputted by the wind power generator is detected, a rotational speed of the wind turbine blade is detected, and on the basis of the detected output current value at the current time, the detected output voltage value at the current time, and the detected rotational speed at the current time, output power at the rotational speed at the current time is calculated, and on the basis of the calculated output power and blade aerodynamic properties, which are properties inherent to the wind turbine blade, the wind power generator is controlled so that an optimal amount of power corresponding to the wind speed can be efficiently obtained in a relatively low wind speed region and a wind power generation control method for controlling the wind power generator are provided.03-15-2012
20120061965VERTICAL AXIS WIND TURBINE WITH ELECTRONICALLY CONTROLLED ASSISTED START MECHANISM AND CONTROLLED AIRFLOW - A wind turbine generator includes: a rotor including a vertical shaft and blades radially extending from the shaft, the rotor is characterized by a breakaway torque that is greater than the torque required to maintain rotation; a generator operationally coupled to the rotor shaft; a rotatable airfoil shaped housing enclosing at least a portion of the rotor blades and exposing at least a portion of the rotor blades; a motor mechanism operatively coupled to the rotor shaft; sensors adapted to determine wind speed; a processor operatively coupled to the sensors and the motor mechanism, wherein, in reaction to input received from the sensors, the processor provides a control signal to the motor mechanism to assist the rotation of the rotor shaft when the wind speed is below the speed needed to induce breakaway torque and above the threshold required to rotate the rotor once the initial resistance is overcome.03-15-2012
20120061963Power system frequency inertia for power generation system - A power generation system is provided. The power generation system including a power generation unit operable to supply electrical power to an utility system; a synchronous machine coupled to the utility system; a grid measurement device arranged for measuring the current and power that is exchanged between the synchronous machine and the utility system; a controller for adjusting the output power of the power generation unit as a function of the power and current that is measured by the grid measurement device; and a communication link between the grid measurement device, controller and/or the power generation unit. The power generation unit is configured to provide current and power to the utility system as a function of the power and current that is measured by the grid measurement device.03-15-2012
20120061961WIND TURBINE GENERATOR AND METHOD OF CONTROLLING THE SAME - An object of the present invention is to, if a frequency decrease has occurred in a power system, avoid a trip in a wind turbine generator and reliably contribute to recovery of the frequency of the power system. The present invention provides a wind turbine generator that, if a predetermined frequency decrease that requires PFR has occurred in the power system, calculates a marginal active power based on the difference between a predetermined rotational speed lower limit value, which is obtained by providing the parallel-off rotational speed with a predetermined margin, and a measured value of the shaft rotational speed, and generates an active power command value based on the marginal active power.03-15-2012
20120061960WIND TURBINE GENERATOR SYSTEM AND WIND TURBINE GENERATOR - An object of the present invention is to make use of wind energy as effectively as possible and increase the amount of generated energy that is supplied to a power system. A power storage apparatus is interposed between and electrically connected to a wind turbine generator and a power system. The wind turbine generator outputs, to the power system side, an amount of active power obtained by subtracting auxiliary machine loss, which is power consumed by an auxiliary machine, from the maximum active power that can be output by a generator, and if the amount of active power output from the wind turbine generator exceeds a limited power value set for the power transmission end, a charge/discharge controller that controls the power storage apparatus causes the power storage apparatus to be charged with part of the power output from the wind turbine generator.03-15-2012
20120061959OUTPUT CONTROL METHOD AND OUTPUT CONTROL UNIT FOR WIND POWER PLANT - A control method for a wind turbine generator and storage battery unit connected to a power grid in parallel, includes calculating total active power and total reactive power, and switching between: a first mode in which the generator outputs turbine required active power and reactive power that can be outputted by the generator and the battery unit outputs battery required active power and battery required reactive power which correspond to a difference between the total active power and the turbine required active power and a difference between the total reactive power and the turbine required reactive power respectively; and a second mode in which the battery required active power is maintained and the battery required reactive power is reduced while the turbine reactive power is increased by an amount of the reduction of the battery required reactive power wherein apparent power exceeds a set battery unit apparent power.03-15-2012
20120061958WIND TURBINE GENERATOR - An object of the present invention is to provide a wind turbine generator and an operation control method thereof, which takes measures against issues such as noise, bird strike and a friction heat of a bearing shaft. The wind turbine generator 03-15-2012
20120043759MULTIPLE CABINETS - An electric power generating device comprising a wind power plant 02-23-2012
20120043760EMERGENCY POWER SUPPLY DEVICE - The invention relates to an emergency power supply device for a rotor blade adjustment system (02-23-2012
20090108582METHOD OF CONTROLLING A WIND ENERGY SYSTEM AND WIND SPEED SENSOR FREE WIND ENERGY SYSTEM - A method for controlling a wind energy system is provided wherein the method comprises determining the effective wind speed taking into account the load on the rotor blades of said wind energy system exerted by the wind is provided. A computer-readable medium is provided that provides instructions which when executed by a computing platform cause the computing platform to perform operations wherein the operations include the method according to embodiments described herein. Further, a wind energy system having a calculation unit adapted for calculating the effective wind speed by taking into account the load on the rotor blades of said wind energy system exerted by the wind is provided. Further, a wind speed sensor free wind energy system having a generator for generating electric energy and a controller for shutting down and/or starting the electric energy generation in dependence of the wind speed is provided.04-30-2009
20110316279Wind Turbines with Diffusers for the Buildings or Structures - One example of our system makes it easier to bring the wind turbines to the residential and densely populated areas. The systems can be cascaded together to supply a bigger population or area. Since most of the system is hidden, it looks better for appearance of the city/houses. It has less of noise problem near houses, and less bird and bat mortality rates, with less radar interferences, less maintenance worker hazard, and less shipping/installation cost. This technology addresses e.g. Energy and Power Management Systems for harvesting wind energy by wind-catcher tower and diffuser augmented wind turbines. For example, we discuss the placement of diffusers at the intake of the wind turbines, inside a wind-catcher tower, to significantly increase the efficiency of the wind energy capture, plus the modular design of the wind-catcher tower. Various designs for the system and components are presented here.12-29-2011
20110316277Blade Pitch Control in a Wind Turbine Installation - The present invention relates to a blade pitch controller for a floating wind turbine structure, wherein the floating wind turbine structure may include a support structure supporting a rotor having a number of blades. The controller may include standard blade pitch control means and active damping means. The standard blade pitch control means is arranged to control a blade pitch using a transfer function between a rotor speed error and the blade pitch. The active damping means is arranged to further control the blade pitch on the basis of a speed of a point on the wind turbine structure by converting the speed of a point on the wind turbine structure into a rotor speed error and using the same transfer function that is used in the standard blade pitch control means to convert the rotor speed error into a correction to the blade pitch.12-29-2011
20110101692AIRBORNE WIND POWERED GENERATOR - A wind powered generator is described that may take advantage of the strong wind present at higher altitudes above terrain than can feasibly be reached by traditional tower mounted wind generators. It makes use of a combination of lift sources. The generator comprises an envelope filled with a lifting gas that enables the system to rise in little or no wind, and wings that provide additional lift when there is wind, to thereby prevent the wind from blowing the tethered generator to the ground. The airborne wind powered generator is able to both rise aloft and land unattended. Power is extracted from the wind by means of turbine rotors that drive electric generators.05-05-2011
20110057444GRID FAULT RIDE-THROUGH FOR CURRENT SOURCE CONVERTER-BASED WIND ENERGY CONVERSION SYSTEMS - Current source converter (CSC) based wind energy power conversion systems (WECS) and methods are presented in which a unified DC link current control scheme is employed to facilitate grid fault ride-through conditions, with a multiple-mode converter control system that combines the power flow control capabilities of the generator-side and grid-side converters, in which transitions between normal operation and fault condition are achieved automatically by monitoring the grid voltage without the need for, or with partial additional ride-through components.03-10-2011
20110057443COLLECTOR ANTI-WEARING AND LUBRICATION SYSTEM FOR VARIABLE SPEED WIND TURBINE - A variable speed wind turbine having a doubly fed induction generator (DFIG), includes an exciter machine mechanically coupled to the DFIG and a power converter placed between a rotor of the DFIG and the exciter machine. Thus, the power converter is not directly connected to the grid avoiding the introduction of undesired harmonic distortion and achieving a better power quality fed into the utility grid. Moreover, the variable speed wind turbine includes a power control and a pitch regulation.03-10-2011
20120001428WIND ENERGY SYSTEM - A wind energy system continuously responsive to changes in wind direction and speed. The system includes a low-profile, rotatably-mounted turbine assembly. The turbine assembly includes a wind tunnel with a “cow catcher” style wind gatherer. The tunnel defines a narrowed throat portion between the inlet and outlet to increase the wind speed. A turbine mounted on a stand is fitted inside the outlet end of the tunnel, and may be movable fore and aft in response to changes in wind speed. A control system receives regular wind change forecasts from a third party, and automatically repositions the rotating turbine assembly in response to real-time predicted changes in wind vector and may also move the turbine axially relative to the throat in the tunnel in response to real-time predicted changes in wind speed. Additionally, the turbine may be turned out of the wind to avoid excessively high winds.01-05-2012
20110156393WIND TURBINE GENERATOR, ACTIVE DAMPING METHOD THEREOF, AND WINDMILL TOWER - A wind turbine generator, an active damping method thereof, and a windmill tower in which vibrations of the wind turbine generator itself or the windmill tower can be reduced at low cost are provided. The acceleration due to vibrations of a nacelle is detected with an accelerometer attached to the nacelle. In an active damping unit, a pitch angle of windmill blades for generating a thrust on the windmill blades so as to cancel out the vibrations of the nacelle is calculated on the basis of the acceleration, and the pitch angle is output as a blade-pitch-angle command δθ* for damping. On the other hand, in a pitch-angle control unit, a pitch angle of the windmill blades for controlling the output to be a predetermined value is calculated, and the pitch angle is output as a blade-pitch-angle command θ* for output control. The blade-pitch-angle command δθ* for damping is combined with the blade-pitch-angle command θ* for output control using a subtracter. The pitch angle of the windmill blades is controlled on the basis of the resulting blade-pitch-angle command after combining.06-30-2011
20110156392WIND TURBINE CONTROL - Wind turbine systems and methods are provided. The wind turbine system includes a plurality of coaxial, counter-rotating turbine assemblies. First and second shroud assemblies define a generally spherical volume containing the first and second turbine assemblies. The first and second shroud assemblies each include a shroud member that is controlled in response to information from a wind sensor to selectively shield or expose portions of the respective turbine assemblies to the wind by changing the rotational position of the shroud members about the system axis. The turbine assemblies are interconnected to a generator for the production of electrical power.06-30-2011
20110156391POWER PRODUCTION CONTROL SYSTEM AND METHOD - A control system for an energy production facility includes a plant controller for receiving an indication of a measured power output of the energy production facility that includes power generators and produces output signals. The system also includes a processing unit operably coupled to the plant controller and responsive to executable computer instructions when executed on the processing unit cause the plant controller to: create an output signal that causes an energy storage device to discharge in the event power reserves of the power generators can not met the requested ramp down rate; and create an output signal that causes the energy storage device to charge up in the event that the power capability of the power generators can meet the requested ramp down rate.06-30-2011
20110156390METHOD FOR CONTROLLING A WIND TURBINE - The proposed invention describes an alternative for machines with at least one power unit (06-30-2011
20110156389WIND TURBINE CONTROL METHOD - The present disclosure relates to a method for controlling a wind turbine of the type including a rotor, a generator, a frequency converter, a control unit and means for connecting to a wind farm grid, using means for receiving a local voltage reference value (V06-30-2011
20110156388WIND TURBINE GENERATOR SYSTEM - It is an object to provide a wind turbine generator system that can promptly restore the system voltage in the event of, for example, a low voltage phenomenon. A controller 06-30-2011
20110049890Method of reducing torsional oscillations in the power train of a wind turbine - The present invention refers to a method of reducing torsional oscillations in the power train of a wind turbine in the event of grid loss. According to the method, after the grid loss, a braking torque is applied to the power train during a period of time and said period of time is determined as a function of the torsional resonance frequency of the power train.03-03-2011
20110049889WIND TURBINE GENERATOR SYSTEM - To shorten a startup interval to reach a synchronizing condition, a phase difference and an amplitude difference between the grid voltage and the stator voltage of one phase of a winding are obtained. The difference in amplitude is decreased prior to or in parallel to synchronizing the stator voltage with the grid voltage. The calculated compensation phase compensation value is used as an initial value for synchronizing at the next synchronizing operation.03-03-2011
20110049888STRESS ANALYSIS DEVICE FOR WIND-TURBINE STRUCTURE, COMPUTER-READABLE STORAGE MEDIUM STORING STRESS ANALYSIS PROGRAM, AND WIND TURBINE GENERATOR SYSTEM - Provided is a stress analysis device 3 for a wind-turbine structure, which includes a load-data generating section 21 that generates load time-series data of a predetermined load observation point, set in the wind-turbine structure, on the basis of a parameter related to an operating environment, and a stress analyzing section 22 that generates stress time-series data of at least one target analysis point, set in the wind-turbine structure, on the basis of the load time-series data.03-03-2011
20110049887WIND TURBINE DATA ACQUISITION SYSTEM - Sensor networks, methods and computer program products for state monitoring of a wind turbine. The sensor network may include one or more standard sensor modules each having a sensor for measuring a parameter of the wind turbine or its surroundings. The wind turbine includes a processor for receiving input from the one or more standard sensor modules, and a data transfer channel for transferring sensor output from the one or more standard sensor modules to the processor. The data transfer channel has one or more auxiliary connection points for connection of one or more additional sensor module. The one or more additional sensor modules are in surplus of the standard sensor modules in a standard set-up of the wind turbine sensor network. The embedded turbine data acquisition system takes advantage of an existing turbine back-bone network for data transport.03-03-2011
20110049886DEVICE AND METHOD FOR DETECTING THE LOADING OF PIVOTED ROTOR BLADES - A method and a device for measuring the loading on rotor blades, especially of wind power plants with swiveling rotor blades, the loading of the rotor blades being determined by way of deformation of a bearing ring of the swiveling rotor blade takes place economically with proximity sensors, but can also take place advantageously with fiber optic sensors. With an electronic evaluation device, the deformation of the bearing ring is referenced to the loading of the rotor blade. In one advantageous embodiment, an inclinometer is also provided.03-03-2011
20110049885WIND TURBINE CONTROL METHODS AND SYSTEMS - A method of controlling the operation of a variable speed wind turbine (03-03-2011
20110049884YAW SYSTEM FOR A NACELLE OF A WIND TURBINE AND WIND TURBINE - A yaw system of a wind turbine includes a plurality of motors, each motor being coupled to the nacelle for applying torque to the nacelle; a plurality of controllers, one controller for each of the motors, each controller being configured to control the respective motor and coupled to at least one other controller to transmit operation information thereto; and a yaw system controller configured to transmit control information to at least one controller of the plurality of controllers. At least one of the controllers is configured to control the respective motor based on at least one of the control information and the received operation information from the at least one other controller. Communication between the controllers of the respective motors can allow a faster response of the yaw system to yaw the nacelle according to a change of wind direction.03-03-2011
20110049883SYSTEM, DEVICE AND METHOD FOR WIND TURBINE CONTROL BASED ON OPERATING PROFILES - A method for operating a wind turbine based on operating profiles for the wind turbine corresponding to operating modes. The method includes defining operating modes and acquiring a plurality of parameter values, each based on a reading from a sensor of the wind turbine. Each of the parameter values is associated with one of the operating modes to create a wind turbine operating profile for each mode. The wind turbine is controlled based on the operating profiles.03-03-2011
20120056428VEHICLE WIND TURBINE - Systems and methods of capturing and channeling air through a wind turbine mounted atop a truck (or vehicle roof) are disclosed. The air can be channeled through a specially designed truck roof into an inlet of a wind turbine. In other aspects, ductwork can be used to channel and direct air captured while the truck is in motion. The wind turbine can be a traditional propeller-based turbine. In other aspects, air foil technologies can be employed to increase air flow to and through a turbine.03-08-2012
20120056427METHOD FOR CONTROLLING THE ROTATIONAL SPEED OF A WIND TURBINE - A method controls the rotational speed of a wind turbine having a tower, a nacelle mounted on the tower and a drive train which includes a rotor having at least one rotor blade. The rotor is rotatably mounted about a rotor axis in the nacelle. The drive train further includes a generator configured to be driven by the rotor. In a nacelle-fixed reference system, the rotational speed (ω03-08-2012
20120056426CONTROL SYSTEM AND METHOD FOR A WIND TURBINE - A wind turbine has a rotor with a hub that houses a remote sensing device such as a Lidar for each blade. Each Lidar has one or more look directions that extend generally radially along the respective blade in front of the blade. The Lidar has multiple range gates and wind parameters sensed at each range may be used to control surfaces on the blade such as a trailing edge flap.03-08-2012
20120056429METHOD OF OPERATING A ROTOR BLADE ADJUSTMENT DRIVE - Disclosed is a method for operating a rotor blade adjustment drive for a wind turbine, in which an electric working load (03-08-2012
20120056425STAND ALONE OPERATION SYSTEM FOR USE WITH UTILITY GRADE SYNCHRONOUS WIND TURBINE GENERATORS - Methods and system are provided for operating an energy producing device when a utility grid is unavailable. The energy producing device includes a power system receiving power from a generator of the energy producing device. The power system includes a main power component and an accessory power component, where the received power is provided to the main power component and accessory power component depending upon the availability of the utility grid. The main power component provides the received power to the utility grid and the accessory power component provides power to accessories of the energy producing device, wherein the power includes the received power and power from an energy storage device included within the accessory power component.03-08-2012
20120007362TURBINE ASSEMBLY - A turbine assembly (01-12-2012
20120205912WIND-TURBINE-GENERATOR CONTROL APPARATUS, WIND TURBINE GENERATOR SYSTEM, AND WIND-TURBINE-GENERATOR CONTROL METHOD - A wind-turbine control device controls a wind turbine generator in which a rotor having a plurality of blades receives wind and rotates. The generator generates electrical power through the rotation of the rotor. The electrical power is supplied to a utility grid, and electric energy to be supplied to the utility grid can be changed according to a change in the frequency of the utility grid. The wind-turbine control device includes a subtracter to calculate a frequency change, which is the difference between a measurement value of the frequency of generated output power of the wind turbine generator and a set value of the frequency of the generated output power of the wind turbine generator. The wind-turbine control device further includes a limiter to limit a change in the electrical power corresponding to the frequency change calculated by the subtracter, based on the rotational speed of the generator.08-16-2012
20120112458WIND TURBINE GENERATOR AND YAW ROTATION CONTROL METHOD FOR WIND TURBINE GENERATOR - There is provided a yaw rotation control method for a wind turbine generator that does not require a yaw motor and is advantageous for a reduction in cost and a reduction in size and weight of a nacelle. A control unit performs, according to a deviation between wind direction information (θw) obtained from a wind direction detecting unit and a present state yaw angle (θz) obtained from a yaw rotating position detecting unit, yaw rotation control for outputting pitch angle command values (θ05-10-2012
20120112459Vertical vane wind turbine having peripheral weight distribution - A wind turbine system includes a turbine having a plurality of semi-cylindrical vanes supported in a cylindrical array by rotatable top, center and bottom plates. The supporting plates are joined to a center shaft which in turn is rotatably supported. A plurality of alternators are driven by the center shaft through a pulley and belt arrangement. The vanes are positioned at the periphery of the cylindrical array and occupy less than one-third of the radial distance of the support plates.05-10-2012
20120112460PROBING POWER OPTIMIZATION FOR WIND FARMS - Embodiments of the invention are generally related to optimizing performance of a wind power plant. A controller may be configured to sequentially, for each wind turbine in a wind power plant, adjust the power production by a predefined amount, and determine whether the adjustment of power production from the wind turbine results in an increase in overall power production from the wind farm. Adjustments in power production of the wind turbines may be continuously made so that power production of the wind power plant approaches the maximum possible value.05-10-2012
20120013124MECHANICAL WIND TURBINE AND METHOD OF USE - A mechanical wind mill is provided for producing electricity through the power of wind energy. The wind turbine may include a plurality of gears which may be interchanged to control the rotational velocity of the wind turbine to most efficiently produce electricity. Including in the plurality of gears are the set of gears which may be slid along a shaft to best control the rotational velocity, but which may be changed as wind speed changes. The gears are mounted on a shaft, which is connected to a generator that is capable of producing electricity by rotation of said shaft.01-19-2012
20100013225WIND SYSTEM FOR CONVERTING ENERGY THBOQGI A VERTICAL-AXIS TURBINE ACTUATED BY MEANS OF KITES AND PROCESS FOR PRODUCING ELECTRIC ENERGY THROUGH SOCH SYSTEM - A wind system for converting wind energy including at least one kite that can be driven from ground immersed in at least one wind current and a vertical-axis wind turbine placed at ground level. The wind turbine includes at least one arm connected through two ropes to the kite, the kite configured to be driven through the turbine to rotate the arm and convert wind energy into electric energy through at least one generator/motor system operating as a generator that co-operates with the turbine. The ropes are configured both to transmit mechanical energy from and to the kites, and to control the flight trajectory of the kites. A process produces electric energy through such a system.01-21-2010
20090001723METHOD FOR STARTING UP A WIND ENERGY PLANT AFTER AN OPERATION STOPPAGE AND WIND ENERGY PLANT WHICH CAN EXECUTE THE METHOD - A method for starting up a wind energy plant after an operation stoppage, wherein the wind energy plant has a gearbox in the drive train and an operation management which can control at least one operational variable significant for the strain of the gearbox B of the wind energy plant to a desired value B01-01-2009
20120025530SYSTEM AND METHODS FOR CONTROLLING THE AMPLITUDE MODULATION OF NOISE GENERATED BY WIND TURBINES - In one aspect, a method for controlling the amplitude modulation of the noise generated by wind turbines is disclosed. The method may include determining a rotor position of a first wind turbine, determining a rotor position of a second wind turbine, determining if the first and second wind turbines are operating in-phase and, in the event that the first and second wind turbines are operating in-phase, adjusting an operating condition of at least one of the first wind turbine and the second wind turbine so that the first and second wind turbines operate out-of-phase.02-02-2012
20120025529System and Methods for Monitoring Oil Conditions of a Wind Turbine Gearbox - A method for monitoring the condition of oil contained within a gearbox of a wind turbine is disclosed. The method generally includes receiving a signal corresponding to a measurement of an oil parameter of the gearbox, comparing the measurement to a predetermined limit for the oil parameter, assigning a severity level based on the comparison of the measurement to the predetermined limit and determining a recommended course of action for the wind turbine based on the severity level.02-02-2012
20120025527SYSTEM AND METHOD TO PROVIDE CONSTANT SPEED MECHANICAL OUTPUT IN A MACHINE - A system to provide constant speed mechanical output in a wind turbine is provided. The system includes at least one electrical machine configured to convert a rotary mechanical power received from a main gear to a machine electrical power. The system further includes one or more electrical converters electrically coupled to the machine and configured to convert the machine electrical power from a direct current (DC) power to an alternate current (AC) power or from the alternate current (AC) power to the direct current (DC) power, where the converters generate a differential electrical power. A torque converter is electrically coupled to the electrical converters and generates a constant speed mechanical output employing the differential electrical power received from the one or more electrical converters.02-02-2012
20120025528MAGNETOSTRICTIVE SENSOR SYSTEM AND METHOD - A magnetostriction-based sensor system for sensing force on a wind turbine rotor shaft having multiple localized magnetized domains sensitive to magnetostriction. The sensor system includes at least two sets of first and second magnetometers. The signals from the at least two sets of first and second magnetometers can be utilized to determine torsional and linear forces being exerted on the wind turbine rotor shaft.02-02-2012
20120025525PITCH DRIVE APPARATUS OF WIND GENERATOR AND WIND GENERATOR - The present invention provides a pitch drive apparatus of a wind generator and the wind generator constituted not to affect a main shaft or a gear box, and capable of preventing reliability from being deteriorated. The pitch drive apparatus includes a wind turbine blade (02-02-2012
20100096855Wind Power Plant - A wind power plant, comprising a tower, a rotor mounted on the tower and having at least one rotor blade, and a power conversion unit, is characterized by a swivel bearing, the swiveling plane of which lies between an approximately horizontal rotor axis (x) and a vertical tower axis (y), at least one motor for swiveling the rotor, along with the power conversion unit, from a first position in which the rotor axis (x) extends at least approximately in a horizontal direction into a second position in which the rotor axis (x) extends at least approximately in a vertical direction.04-22-2010
20100096854VERTICAL AXIS WIND TURBINE USING INDIVIDUAL BLADE PITCH AND CAMBER CONTROL INTEGRATED WITH MATRIX CONVERTER - A vertical axis wind turbine that can be actively controlled has the potential to extract wind energy efficiently, and consequently be economically viable for distributed harvesting of wind energy. This invention includes mechanisms and methods for enabling high-efficiency wind energy extraction by a vertical axis wind turbine using active pitch and camber control of individual blades. Blade control is further integrated with generator control and power electronics. Integrated control algorithms are systematically constructed, and transmitted to the wind turbine through a wireless communications interface. The interface also allows the user to continuously monitor the state of the wind turbine system. This invention includes sensors and procedures for periodic self-calibration of wind turbine parameters for preserving the long-term efficiency of wind energy extraction. Furthermore, a capability to intelligently interact with other wind turbine systems in a wind-farm setting is incorporated.04-22-2010
20120205911METHOD AND SYSTEM FOR CONTROLLING A DC LINK VOLTAGE OF A POWER CONVERTER CONNECTING AN ELECTRIC GENERATOR OF A WIND TURBINE WITH A POWER GRID - A method is provided for controlling a DC link voltage of a power converter connecting an electric generator of a wind turbine with a power grid. The method includes determining the rotational speed of a rotor of the electric generator. The method further includes determining a strength of harmonic components of the rotational speed of the rotor, wherein the harmonic components have frequency components being different from a fundamental rotational frequency of the electric generator. The method also includes determining a damping reference signal as a function of the determined strength of the harmonic components, and controlling the DC link voltage of the power converter in response to the determined damping reference signal. A corresponding control system is also provided.08-16-2012
20120104755WIND FARM CONTROL SYSTEM, WIND FARM, AND WIND FARM CONTROL METHOD - To prevent disconnection of wind turbine generators due to changes in wind conditions even if the wind turbine generators is operated to limit the power output. A plurality of wind turbine generators that generate electric power by the rotation of rotors are provided in a wind farm are interconnected and are operated while the power outputs are limited in advance so as to be able to further supply electric power to a utility grid in response to a decrease in the frequency or voltage of the utility grid. The rotational speed of the rotor, which is a physical quantity related to increase and decrease in the power output of the wind turbine generator, is measured for each of the wind turbine generators by a wind-turbine control system, and the limitation amount of the power output of the wind turbine generator is set for each of the wind turbine generators by a central control system on the basis of the rotational speed of the rotor measured.05-03-2012
20110089694WIND TURBINE GENERATOR SYSTEM AND CONTROL METHOD OF THE SAME - A wind turbine generator system includes: a wind turbine rotor including a blade having a variable pitch angle; a generator driven by the wind turbine rotor; and a control unit controlling the output power of the generator and the pitch angle of the blade in response to the rotational speed of the wind turbine rotor or the generator. The control unit performs a first control in which the output power is controlled in accordance with a predetermined power-rotational speed curve until the rotational speed is increased to reach a predetermined rated rotational speed, and performs a second control in which the output power is controlled to a predetermined rated power when the rotational speed exceeds the rated rotational speed; the control unit is responsive to the pitch angle for maintaining a state of performing the second control is or for switching to a state of performing the first control, when the rotational speed is reduced below the rated rotational speed after the control unit is once placed into the state of performing the second control.04-21-2011
20110089693WIND ENERGY POWER CONVERSION SYSTEM REDUCING GEARBOX STRESS AND IMPROVING POWER STABILITY - A wind energy power conversion system includes a gearbox, a generator, an AC to DC power converter, a DC link, and a DC to AC power converter, and at least one ultracapacitor module connected in parallel on the DC link. A method of reducing stress on a wind turbine gearbox can be performed by obtaining an unwanted frequency of the wind energy power conversion system gearbox; determining an input torque value on the input shaft of the gearbox as a function of time; determining a frequency of the input torque value; and adjusting a torque on the output shaft of the gearbox based on the unwanted frequency.04-21-2011
20110089692System and Method for Controlling a Wind Turbine - A system to control a wind turbine, including meteorological instruments for measuring ambient climatic conditions, and generating corresponding meteorological signals, a memory for storing an icing tolerance, a first calculator for calculating an overall icing probability based on the meteorological signals and a controller for stopping the wind turbine when the overall probability of icing is greater than the icing tolerance. Also disclosed is a method for controlling a wind turbine, including the steps of a) measuring ambient climatic conditions and generating corresponding meteorological signals; b) storing in memory an icing tolerance; c) calculating an overall probability of icing based on the meteorological signals; and d) stopping the wind turbine when the overall probability of icing is greater than the icing tolerance.04-21-2011
20120211985METHOD OF CONTROLLING A WIND ENERGY SYSTEM AND WIND SPEED SENSOR FREE WIND ENERGY SYSTEM - A method for controlling a wind energy system is provided wherein the method comprises determining the effective wind speed taking into account the load on the rotor blades of said wind energy system exerted by the wind is provided. A computer-readable medium is provided that provides instructions which when executed by a computing platform cause the computing platform to perform operations wherein the operations include the method according to embodiments described herein. Further, a wind energy system having a calculation unit adapted for calculating the effective wind speed by taking into account the load on the rotor blades of said wind energy system exerted by the wind is provided. Further, a wind speed sensor free wind energy system having a generator for generating electric energy and a controller for shutting down and/or starting the electric energy generation in dependence of the wind speed is provided.08-23-2012
20130015660WIND POWER PLANT WITH OPTIMAL POWER OUTPUT - Controlling a wind power plant comprising at least one wind turbine generator for producing power to an electrical grid where the amount of said power is based on a signal response in a voltage signal in said electrical grid due to a change in power output into said electrical grid.01-17-2013
20100289266METHOD FOR THE OPERATION OF A WIND POWER PLANT - A method for the operation of a wind power plant (W), wherein the wind power plant (W) has a tower (T) and a rotor with at least two rotor blades (RB11-18-2010
20100289264WIND-HYDRO POWER GENERATING SYSTEM AND METHOD - A wind-hydro power generation system and its power generation method which use both wind power and hydraulic power. Increasing the size of a hydraulic turbine for the hydraulic power generation may result in the decreased rotation power of the hydraulic turbine caused by the resistance of the wind when blades on the hydraulic turbine come out of the water. The present invention has a blade rotation system on the blades of the hydraulic turbine so that the blades may rotate according to the direction of the wind. As a result, wind resistance is not effected to the rotation of the hydraulic turbine even when the blades on the hydraulic turbine are out of water, but enhances the rotation power of the hydraulic turbine, which enables the use of wind power and hydraulic power at the same time.11-18-2010
20120248772CONTROL DEVICE OF WIND TURBINE GENERATOR, WIND TURBINE GENERATOR, WIND FARM, AND CONTROL METHOD FOR WIND TURBINE GENERATOR - An object is to rapidly recover from a voltage drop in a power grid. When the value of a grid voltage detected by a grid voltage detection unit has fluctuated so as to satisfy a condition set in advance for a reference value, a control device controls a wind turbine generator such that a reactive current corresponding to a required output current that is determined by an active current and the reactive current and that indicates an output level to a power grid on the basis of the detection result from the grid voltage detection unit is output to the power grid.10-04-2012
20120248771ICE DETECTION METHOD AND SYSTEM FOR WIND TURBINE GENERATORS USING SUN RADIATION SENSORS - The present invention defines a system and method aiming at measuring the direct solar radiation received by a wind turbine generator in order to detect ice formation. The measured value is subsequently compared to a theoretical radiation curve wherein measured values on a cloudy day will be well below theoretical curves. Ice detection is made considering the presence of clouds and temperature. Measured parameters are preferably the direct sun radiation transmittance and ambient temperature.10-04-2012
20120248770High Altitude Wind Power Generator with Kite and Dual Purpose Circular Fan - Disclosed apparatus enables us to harvest wind power in high altitude atmosphere by taking advantage of kite, airfoil and dual purpose circular fan. The kite keeps the wind power turbines floated at high altitude when wind power is sufficient enough to sustain them. With help of stepping motor, the circular fan can be positioned either in vertical or horizontal position. In former position, the fan drives wind turbine to generate power as it is in angle of attack. In latter position, the turbine is converted into electrical motor with power provided from external source. It drives the fan providing floating forces when wind speed is too slow to keep the apparatus floated only by the kite or while the apparatus is ascending or descending.10-04-2012
20120161442TURBINE SPEED STABILISATION CONTROL SYSTEM - A closed loop turbine speed control system for a turbine power production system including a closed loop hydrostatic transmission system for the transfer of energy from a wind turbine rotor to a generator. A displacement actuator is arranged for receiving a displacement control signal from the control system and for controlling a displacement of the displacement motor. The control system includes a turbine rotor speed feedback control loop for calculating the displacement control signal based on deviations of a turbine rotor actual rotational speed from a turbine rotor set rotational speed. In addition a hydraulic pressure meter measures the hydraulic pressure of the hydrostatic system and provides a hydraulic pressure signal as an input to a pressure feedback control loop for stabilizing the displacement control signal based on the hydraulic pressure signal.06-28-2012
20100207389WIND TURBINE - A wind turbine for generating an electric voltage from mechanical energy derived from wind is provided. The invention includes a specially designed turbine enclosure through which the wind passes. The enclosure has a Venturi area which results in movement of the wind at a rapid speed through the turbine. An electric generator with a ratable blade also is provided within the Venturi area in order to take advantage of the faster moving wind. The faster the wind moves, the more energy can be converted by the generator. The generator can be constructed with a plurality of electric coils and magnets which can be arranged in series/parallel combinations depending on the power requirements of a particular application.08-19-2010
20120211982CONTROLLER FOR WIND TURBINE GENERATOR, WIND TURBINE GENERATOR, AND METHOD OF CONTROLLING WIND TURBINE GENERATOR - If blades have been struck by wind that has reached a power reduction start wind speed that is lower than a conventional cut-out wind speed at which torque acting on a main shaft reaches the torque limit, a wind turbine generator performs torque reduction control for causing the change in the torque when wind speed is higher than the power reduction start wind speed to be different from change in the torque when wind speed is lower than the power reduction start wind speed so as to prevent the torque from exceeding the torque limit at the conventional cut-out wind speed. For example, if the wind striking the blades reaches the power reduction start wind speed, the wind turbine generator sets the slope of change in torque lower than that before the power reduction start wind speed is reached. Accordingly, the wind turbine generator can reduce the load acting on a device and suppress a reduction in power even if the blades are struck by strong wind.08-23-2012
20110181045MONITORING DEVICE FOR PITCH SYSTEMS OF WIND ENERGY SYSTEMS - A wind energy installation, monitoring device, and method. An exemplary wind energy installation includes a rotor including at least one blade and a generator configured to be driven by the rotor to produce electrical energy. The installation also includes a pitch device configured to vary the at least one blade of the rotor. The pitch device includes a power supply unit with a battery, an actuating drive, a monitoring unit, and a load module configured to switch the actuating drive between an operating mode and a test mode. In the test mode, the actuating drive forms a preselectable defined load for the battery. Accordingly, a high and reproducible load not dependent upon environmental conditions may be applied to conduct a stress test, even during ongoing operation.07-28-2011
20120133138PLANT POWER OPTIMIZATION - Embodiments of the invention are generally related to optimizing performance of a wind power plant. A controller may be configured to determine that a first wind turbine is in the wake of a second wind turbine and that power production at the first wind turbine can be increased by reducing power production at the second wind turbine. The controller may be further configured to cause the second wind turbine to reduce power production.05-31-2012
20120169052Wind Power Plant with a plurality of Wind Power Devices and Method for Controlling the Wind Power Plant - A wind power plant for converting wind power of a wind field into electrical energy. The wind power plant includes at least one wind power device having a wind measurement device. Furthermore, the wind power plant comprises a central storage device in which wind profile patterns are stored in a wind profile pattern table. The wind measurement device predictively detects current wind measurement values. The wind power plant has a central pattern recognition device that correlates the current wind measurement values of the wind measurement device with the stored wind profile patterns of the wind profile pattern table. A central control device individually controls each single wind power device of the wind power plant as a function of a wind profile pattern determined by correlation.07-05-2012
20120133137WIND TURBINE SYSTEM COMPRISING A DOUBLY FED INDUCTION GENERATOR - A wind turbine includes a gearbox coupled to a rotatable shaft for increasing speed of the rotation of the rotatable shaft, a doubly fed induction generator for generating electrical power from the rotations of the rotatable shaft comprising a stator and a rotor wherein the stator and the rotor comprise a plurality of stator slots and a plurality of rotor slots respectively and a tooth winding wound in at least one of the plurality of stator slots and the plurality of rotor slots wherein the tooth winding includes a fractional slot per pole per phase ratio, and a partial power converter electrically coupled to the doubly fed induction generator for controlling the electrical power for delivery to a power grid.05-31-2012
20120133136ADJUSTABLE WIND-RESISTANCE WINDMILL WITH INDICIA - A windmill having a substantially vertical tower to which a rotatable hub is mounted. At least three arms extend substantially horizontally from the hub and terminate in cones having louvers that can be opened and closed, such as by a servo motor and linkage. A computer receives a signal from a wind direction sensor and actuates the opening and closing of the louvers to optimize wind resistance depending upon the orientation of the cone relative to the wind direction. Indicia are preferably placed on one or both sides of the louvers.05-31-2012
20120133134METHOD AND APPARATUS FOR DAMPING VIBRATIONS IN A WIND ENERGY SYSTEM - A method for influencing vibrations in an operating wind energy system is described. The wind energy system includes a tower including a tower top and an intermediate tower area; and a rotor and a generator arranged at the tower top. The method includes determining the vibration of the intermediate tower area of the wind energy system; and influencing the vibrations of the intermediate tower area dependent on the determined vibrations of the intermediate tower area by adjusting an operating parameter of the wind energy system.05-31-2012
20120133135WIND TURBINE GENERATOR SYSTEM VIBRATION DETECTING DEVICE AND METHOD - A wind turbine generator system vibration detecting device and method are provided. The device comprises: a plurality of vibration sensors arranged on components of a wind turbine generator systems; at least one vibration switch arranged on a nacelle of the wind turbine generator system to detect a vibration signal of the nacelle and sends a fault signal to a control module if the detected vibration signal is larger than a turn-on threshold of the vibration switch; a vibration estimating module connected with the vibration sensors for processing vibration signals generated by the vibration sensors according to preset weighted values and a weighted formula in order to acquire a vibration state data, and comparing the vibration state data with a preset fault value and sending the fault signal to the control module if the vibration state data is not less than the fault value in accordance with the comparison.05-31-2012
20120133132WIND-POWER-STATION CONTROL APPARATUS AND WIND-POWER-STATION CONTROL METHOD - A wind-power-station control apparatus is provided in a wind power station having a plurality of wind turbine generators. To reduce the electrical power supplied from the wind power station to the utility grid, the wind-power-station control apparatus performs, for a wind turbine generator whose actual output electrical power is small relative to the maximum electrical power that can be output, among the plurality of wind turbine generators, output-power reduction control for reducing the output power thereof and increasing the rotational speed of the rotor thereof. Thus, even when control for reducing the output power is performed for the wind turbine generator, it is possible to suppress waste of the wind energy received by the blades and to increase the total annual amount of generated electrical power.05-31-2012
20120211986WIND SENSOR SYSTEM USING BLADE SIGNALS - The present invention relates to a wind-velocity-field measurement system for use in a wind turbine having a rotor with two or more blades, comprising at least one sensor-signal obtained by measuring a physical quantity on at angle least one of the blades, the physical quantity being indicative of at least one wind-velocity-field characteristic; a table (08-23-2012
20120211984WIND TURBINE GENERATOR SYSTEM FAULT PROCESSING METHOD AND SYSTEM - A wind turbine generator system fault processing method and a wind turbine generator system fault processing system are provided. The method comprises: receiving a detection signal sent by a detection element for detecting a running state of a part of a wind turbine generator system, and setting a fault bit corresponding to the part of the wind turbine generator system in a fault state or a non-fault state according to the detection signal; detecting whether the fault bit corresponding to the part of the wind turbine generator system is in the fault state; acquiring a fault control word corresponding to a fault bit of the fault state; and determining whether a part corresponding to the fault bit of the fault state has non-halting fault according to the fault control word, and if so, performing fault reset processing on the fault bit of the fault state.08-23-2012
20120211983METHOD AND SYSTEM FOR OPERATING AN ELECTROMECHANICALGENERATOR - A method for operating an electromechanical generator is provided, the method comprising: determining a magnetic field reference parameter based on an electromagnetic power reference representing a desired output of the electromechanical generator, determining a scaling factor for adjusting an air-gap magnetization level of the electromechanical generator to reduce loss in operating the electromechanical generator, modifying the magnetic field reference parameter with the scaling factor; and operating the electromechanical generator based on at least the modified magnetic field reference parameter.08-23-2012
20090058086Wind turbine system for satisfying low-voltage ride through requirement - A wind turbine system is provided with a wind turbine rotor, a pitch control mechanism, and an emergency power supply mechanism. The wind turbine rotor includes a blade having a variable pitch angle. The pitch control mechanism drives the blade to control the pitch angle. The emergency power supply mechanism generates electric power from rotation of the wind turbine rotor and feeds the electric power to the pitch control mechanism, in response to occurrence of an accidental drop of a system voltage of a power grid.03-05-2009
20120169053Atmospheric Measurement System - A magnitude and direction, or a measure responsive thereto, of a velocity (V) of a first portion (07-05-2012
20110187108WIND TURBINE GENERATOR AND METHOD FOR CONTROLLING WIND TURBINE GENERATOR - When a rotor is suddenly accelerated, a wind turbine generator is stopped without exerting a mechanical impact on both a tower and wind turbine blades. When the rotational speed of a wind turbine rotor is suddenly accelerated, a control unit controls the driving speed of the blades so as to change from high speed to low speed, stepwise or continuously, when a pitch-angle control unit drives the pitch angle of the blades to a feathering side.08-04-2011
20100052323MAGNETICALLY GEARED GENERATOR - The present invention provides a magnetically geared generator including an inner winding unit having a first number of pole pairs, an outer winding unit arranged coaxially around the inner winding unit and having a second number of pole pairs, and a rotatable magnetic flux modulator arranged coaxially between the inner winding unit and the outer winding unit. The inner winding unit, the outer winding unit and the rotatable magnetic flux modulator are adapted to convert rotational input energy provided at the rotatable magnetic flux modulator into electrical output energy provided as an alternating output current at one of the inner winding unit and the outer winding unit, and to control an output frequency of the alternating output current by communicating output energy as an alternating feedback current to the other one of the inner winding unit and the outer winding unit and by adjusting a feedback frequency of the alternating feedback current.03-04-2010
20100052321 METHOD FOR THE OPERATION OF A WIND ENERGY PLANT HAVING A WIND VELOCITY MEASUREMENT DEVICE - A method for the operation of a wind energy plant, which features a wind velocity measurement device and a device for the detection of a mechanical load, with the following steps: measuring a wind velocity with the wind velocity measurement device, detecting a mechanical load with the device for the detection of a mechanical load, determining an estimated value for the wind velocity, based on the determined mechanical load, comparing the wind velocity measured by means of the wind velocity measurement device with the estimated value.03-04-2010
20100052320METHOD AND APPARATUS FOR LOAD MEASUREMENT IN A WIND TURBINE - The present invention provides a connecting device adapted for connecting a hub and a main shaft of a wind turbine. The connecting device comprises at least one sensor bolt connecting the hub and the main shaft, wherein a stress detection element is mounted inside the sensor bolt. The stress detection element is adapted to detect a length variation of the sensor bolt and to output a sensor signal indicative of the length variation of the sensor bolt. A signal output device is used for outputting the sensor signal which is indicative of a stress applied to the sensor bolt.03-04-2010
20120313374ELECTRIC GENERATOR FOR A WIND TURBINE, WIND TURBINE AND METHOD OF DRIVING A WIND TURBINE - An electric generator for a wind turbine, a wind turbine including such an electric generator and a method of driving such a wind turbine are provided. The electric generator includes a generator rotor and a generator stator concentrically arranged around a generator axis and at a distance from each other. The electric generator further includes a distance sensor arrangement including at least one distance sensor adapted to sense the distance between the generator rotor and the generator stator and to provide a sensor signal including an information about the sensed distance.12-13-2012
20090096211Wind Farm and Method for Controlling the Same - A method for controlling dynamic power factor or the reactive power of a wind farm is provided. The wind farm comprises a number of wind turbines connected to a utility grid driven with a requested power factor or a requested reactive power. The wind turbine output voltage is controlled to a specific voltage set point. In the method, the wind farm power factor is measured and compared with the power factor requested for the utility grid, or the wind farm reactive power is measured and compared with the reactive power requested for the utility grid, respectively; the ratio of the wind farm voltage to the utility grid voltage is adjusted, and the output voltage of the individual wind turbines is regulated to correspond to the specific voltage set point; the steps are repeated until the power factor of the wind farm electricity corresponds to the requested reactive power.04-16-2009
20120175878 WIND POWER PLANT AND A METHOD OF OPERATING A WIND POWER PLANT - A method for operating a wind power plant having turbine blades is provided. The method includes performing a monitoring operation to determine whether ice has formed on the turbine blades and, if there is ice on the turbine blades, removing the ice. To remove the ice, the turbine blades are driven alternatingly in opposite directions such that vibrations in the turbine blades are generated. A wind power plant designed to carry out the method is also provided.07-12-2012
20100270799Wind Turbine - A wind turbine that is mounted on a corner of a building and has a shaft that extends upward and outward from the corner, where the turbine blades are located, and the resulting rotation of the shaft is used for some power consumption purpose in our outside the building.10-28-2010
20120074699WIND ENERGY PLANT AND ENERGY TRANSMISSION DEVICE FOR A WIND ENERGY PLANT - A wind energy plant has a rotor with a rotor hub mounted on a pod and a plurality of rotor blades adjustable by corresponding electrical drives. An electrical generator is connected to the rotor for supplying energy to electrical loads arranged in the rotor hub. A primary part of a rotary transformer arranged concentric to a rotor bearing is connected to the pod and a secondary part of the rotary transformer is arranged in the rotor hub and co-rotates with the rotor hub. A first frequency converter is connected between the primary part and a supply voltage source for generating a high-frequency field voltage from a low-frequency supply voltage, and a second frequency converter is connected between the secondary part and the electrical loads for generating a low-frequency load voltage from a transformed high-frequency field voltage.03-29-2012
20120223523WIND TURBINE - The disclosure relates to a wind turbine having a machine support (09-06-2012
20090021015Method And Control System For Reducing The Fatigue Loads In The Components Of A Wind Turbine Subjected to Asymmetrical Loading Of The Rotor Plane - The invention relates to a method for reducing fatigue loads in the components of a wind turbine subjected to asymmetrical loading of its rotor, comprising the steps of: repeatedly collecting and storing load data of the rotor, determining a load distribution function for the rotor from said stored data, deriving a plurality of periodic functions from said load distribution function, determining actions for the wind turbine control means for reducing the fatigue load of the wind turbine components from said derived plurality of periodic functions, and implementing of said determined actions on the wind turbine control means. The invention also relates to a control system as well as a wind turbine and wind park.01-22-2009
20090021014Wind energy installation with an extended rotation speed range - A wind energy installation includes a wind rotor, a double-fed asynchronous generator driven by the wind rotor, a converter provided with a first part on the generator side connected to a rotor and a second part on the network side connected to a stator of the generator, and a control device providing converter regulation. A mode selector can be switched between a normal operating mode and a reduced voltage operating mode, in which the excitation of the generator is reduced compared to the normal operating mode. The under-excitation produces an additional reactive current, thus reducing the rotor voltage. The rotor voltage can be limited even when the load is high and the network frequency or voltage is incorrect. The usable rotation speed range of the wind energy installation can be extended to provide a more powerful generator with a higher rating, without changing the converter.01-22-2009
20120261919CONTROL SYSTEM OF WIND POWER GENERATOR, WIND FARM, AND METHOD FOR CONTROLLING WIND POWER GENERATOR - A wind power generator generates power through a rotation of a rotor and is interconnected, and operated with its power generation output previously limited in order to be able to further supply the power to a power system in response to a decrease in system frequency. Thus, a concentrated control system derives a required restricted amount corresponding to a power generation output required to respond to the decrease in system frequency, derives a value by subtracting an amount corresponding to a latent power generation output with which the power generation output can be increased, from the required restricted amount, and sets a restricted amount of the power generation output in each wind power generator to perform the operation with the power generation output previously limited to respond to the decrease in system frequency, based on the above value.10-18-2012
20120261920ROTARY MOTOR ACTUATOR AND HORIZONTAL AXIS WIND TURBINE - Provided is a rotary motor actuator capable of simplifying the manufacture and assembly process.10-18-2012
20120261918ATMOSPHERIC ENERGY EXTRACTION DEVICES AND METHODS - An apparatus for producing electricity includes a tower capable of adding moisture at the top of the tower to hot-dry air so as to generate a downdraft of wind within the interior of the tower, vanes coupled to the exterior of the tower that at least partially define elongated pockets at the exterior of the tower, flaps located within the pockets configured to redirect incident wind downwards, and at least a first wind tunnel configured to receive the redirected incident wind so as to convert such wind to electricity.10-18-2012
20090189394MOMENTUM-CONSERVING WIND-DRIVEN ELECTRICAL GENERATOR - Wind-driven electrical generators will slow and lose kinetic energy when the wind slows or stops. When the wind slows or stops, kinetic energy in the rotating turbine and other rotating components that would otherwise be lost, is conserved by supplying a supplemental mechanical energy to the rotating components using a battery-powered motor. The electrical power for the drive motor is obtained from solar-charged batteries. In an alternate embodiment, solar cells provide all of the energy for the drive motor.07-30-2009
20100327585Control System for an Electrical Generator and Method for Controlling an Electrical Generator - A method for validating and initializing a control system for an electrical generator connected to a power converter in a wind turbine. The method may include generating a first parameter value representing control signal for controlling the stator flux of a stator of the electrical generator, measuring a second parameter value specifying an electrical operational characteristic of the electrical generator, and determining an accuracy level of the control signal based on the first parameter value and the second parameter value, wherein the accuracy level of the control signal has to fall within a predefined threshold for the control system to be validated.12-30-2010
20100327584WIND ENERGY INSTALLATION HAVING CONVERTER CONTROL - A method for controlling a converter of a wind energy installation. The converter is connected to a rotor of a doubly-fed asynchronous generator for feeding electrical power into an electrical grid and comprises a generator-side inverter, a grid-side inverter, and at least one converter regulator for regulating and/or controlling currents emitted from at least one of the inverters to at least one of the generator and the electrical grid. The method includes detecting a change in electrical voltage present in at least one of emitted real currents and emitted reactive currents at one of the inverters, determining whether the detected change corresponds to a predetermined change, and changing nominal values of at least one of real currents to be emitted and reactive currents to be emitted from the other inverter if the detected change corresponds to the predetermined change.12-30-2010
20080296897VARIABLE SPEED WIND TURBINE DRIVE AND CONTROL SYSTEM - A variable speed wind turbine utilizes a hydraulic transmission including a hydraulic pump coupled to a rotor and a hydraulic motor coupled to an induction generator to produce variable frequency power that is converted to grid frequency power by electronic controls.12-04-2008
20080296898Wind Power Generation System and Method of Controlling Power Converter - A wind power generation system temporarily stops a power converter when a system disturbance occurs, and reactivates the power converter after detecting a solution of the problem of an influence (overcurrent of a stator, direct current component of a stator, overcurrent of a rotor, etc.) of a fault occurring in a doubly-fed generator during a system fault. During a system fault, a reactive current can be safely output from a doubly-fed generator to an electric power system without destroying equipment of the wind power generation system.12-04-2008
20120299298WIND TURBINE CONTROL METHODS AND SYSTEMS FOR COLD CLIMATE AND LOW ALTITUDE CONDITIONS - A method for the operation of a variable-speed wind turbine having pitch and torque control means that includes additional steps for providing to the torque control means, in case of an environmental situation where the air density ρ is greater than a predetermined value ρ11-29-2012
20120261917Black Start of Wind Turbine Devices - A wind turbine device having in one embodiment a diesel generator to initialize a black start in case of a blackout of an electricity network is disclosed. For performing the black start, the diesel generator provides a predetermined voltage to a power output of the wind turbine device in order to imitate the electricity network in its running state. A wind park is also disclosed, the wind park having in one embodiment at least two wind turbine devices. In one embodiment a wind park controller provides the same reference value for the phase angle φ for the at least two turbines.10-18-2012
20100133820SOLAR AND WIND ENERGY CONVERTER - An integrated hybrid energy generating system capable of converting wind and solar energy for use with an electrical generator. During the daytime, the system concurrently derives energy from both wind and solar energy sources. During the nighttime, it continuously harvests wind energy regardless of the weather condition.06-03-2010
20110037264COLUMN-STABILIZED OFFSHORE PLATFORM WITH WATER-ENTRAPMENT PLATES AND ASYMMETRIC MOORING SYSTEM FOR SUPPORT OF OFFSHORE WIND TURBINES - A floating wind turbine platform includes a floatation frame (02-17-2011
20110037263BLADE ANGLE ADJUSTMENT RATE LIMIT ADJUSTMENT - A method for the operation of a wind power plant (02-17-2011
20110037262WIND ENERGY INSTALLATION WITH VARIABLE ROTATION SPEED CHARACTERISTIC - A wind energy installation including a wind rotor, a doubly-fed asynchronous generator driven by the wind rotor, a converter, and a controller configured to determine an operating torque for an operating rotation-speed, the operating torque not exceeding a maximum torque. The installation also includes a frequency-adaptive torque limiter having a classifier—for an overfrequency or underfrequency, a torque shifter configured to reduce the maximum torque in the event of frequency discrepancies, and an inhibitor configured to block the torque shift at an underfrequency. The installation further includes a frequency-dependent rotation-speed limiter configured to interact with the classifier such that a lower limit rotation-speed is increased only at an overfrequency and an upper limit rotation-speed is reduced only at an underfrequency. Accordingly, the operating torque can be adapted with respect to the permissible limit values rather than over the entire operating range, thus minimizing yield losses when frequency discrepancies occur.02-17-2011
20110037261System And Method For Producing Electrical Power - The disclosed technology is an electrical power system that includes a turbine, a turbine housing, an incoming channel and a generator. The turbine has at least two turbine blades and the turbine housing has at least two openings. The incoming channel directs and amplifies a flow of a working fluid at one of the openings in the turbine housing and the incoming channel is mounted in such a way that the flow of the working fluid strikes an upper portion of turbine blades. This configuration allows the turbine to rotate which in turn allows the generator to produce electrical power.02-17-2011
20110215578WIND TURBINE GENERATOR SYSTEM - To shorten a startup interval to reach a synchronizing condition, a phase difference and an amplitude difference between the grid voltage and the stator voltage of one phase of a winding are obtained. The difference in amplitude is decreased prior to or in parallel to synchronizing the stator voltage with the grid voltage. The calculated compensation phase compensation value is used as an initial value for synchronizing at the next synchronizing operation.09-08-2011
20110215576WIND TURBINE GENERATOR AND METHOD OF CONTROLING THE SAME - The present invention provides a wind turbine generator and a method of controlling the same which can prevent the decline in power generation efficiency even when the generator is located where the wind is not always strong. The wind turbine generator mainly includes an anemometer, an anemoscope, a nacelle swiveling mechanism which turns a nacelle, and a control unit which controls the nacelle swiveling mechanism. The control unit controls the nacelle swiveling mechanism so as to swivel the nacelle based on the wind direction obtained from the measurement result of the anemoscope when the wind speed obtained from the measurement result of the anemometer is greater than a first threshold V09-08-2011
20110221193WIND TURBINE AND POWER SUPPLY SYSTEM - A horizontal axis wind turbine for generating electrical energy for supply to an energy storage device having a limited energy storage capability. The wind turbine comprises: a rotor having a plurality of blades mechanically connected thereto for converting kinetic wind energy to rotation of the rotor at a rotational speed; a generator comprising a stationary portion and a rotatable portion connected to the rotor for interacting with the stationary portion to convert the rotation of the rotor into electrical energy for supply to the energy storage device; a sensor for sensing the rotational speed of the rotor and for outputting a signal indicative thereof and a braking system controllable to mechanically interact with the rotor to reduce the rotational speed of the rotor. The wind turbine further comprises processing circuitry operatively connected to the sensor and to the braking system for evaluating the signal output by the sensor and, if the rotational speed is above a predetermined threshold value, controlling the braking system to reduce the rotational speed through mechanical interaction with the rotor.09-15-2011
20110227343WIND POWER PLANT AND WIND-POWER-PLANT CONTROL METHOD - A wind power plant includes a wind turbine generator and an electrical storage device that supply electric power to a utility grid. A wind-turbine controller performs for the wind turbine generator an acoustic-noise suppression operation in which the rotational speed of blades is controlled in order to suppress acoustic noise, and also calculates a reduction in output power that is the difference in output power between the normal output power and the acoustic-noise-suppression output power. An electrical-storage-device controller causes the electrical storage device to be charged or discharged, based on the reduction in output power, the acoustic-noise-suppression output power, and the grid-demanded output power demanded from the utility grid. Therefore, the wind power plant can supply, to the utility grid, the electric power demanded from the utility grid even when the operation of suppressing the occurrence of acoustic noise is performed for the wind turbine generator.09-22-2011
20110227342WIND TURBINE ROTOR AND METHOD OF CALIBRATING ROTOR BLADE PITCH - A wind turbine rotor comprising a hub with a rotor blade mounted to a bearing of the hub wherein the rotor blade has a longitudinal axis extending in a radial direction relative to an axis of rotation of the hub, and the rotor blade is rotatable about its longitudinal axis whereby the pitch of the rotor blade is adjustable, The rotor blade has a tag such as an RFID tag fixed on the rotor blade at a predetermined angular position about the longitudinal axis of the rotor blade; and a sensor is fixed on the hub for contactless sensing of the tag when the tag is in a predetermined angular position about the longitudinal axis of the rotor blade. Repeated and accurate calibration of rotor blade pitch is hereby made possible.09-22-2011
20120080881SYSTEM, DEVICE, AND METHOD FOR AUTOMATED MONITORING AND OPERATION OF WIND TURBINES - A method for use in operating one or more wind turbines is provided. An exception condition and, optionally, one or more parameters are received from a wind turbine controller. A correction is determined based at least in part on the exception condition and/or the parameters. The correction is applied, facilitating resolution of the exception condition. The method may be practiced for multiple wind turbine controllers, such as the wind turbine controllers within a site or the wind turbine controllers within multiple sites.04-05-2012
20100032948Method and apparatus for operating and controlling airborne wind energy generation craft and the generation of electrical energy using such craft - The invention described herein relates generally to wind power generation. In particular, the invention relates to devices and methods used for launching and retrieving wind energy generating craft as well as novel constructions of such craft. Additionally, novel structures for tethers and tether operation is disclosed. Also, methods and apparatus for power generation are described. The craft described herein are intended for electrical power generation utilizing the wind energy collected from air currents.02-11-2010
20100230967WIND POWER GENERATOR - A wind power generator in which a rotating force of front and rear blades, which rotate in opposite directions to each other against the wind, enables a permanent magnet and a coil body to rotate in opposite directions so as to provide high efficiency of power generation, wherein at a low wind speed, according to the wind direction, the wind power generator freely rotates towards the wind so as to face the wind, at a middle wind speed the wind power generator is forced to rotate toward the wind so as to face the wind using power of a driving motor, and at a high wind speed the wind power generator is forced to rotate perpendicular to the wind using power of the driving motor so as to prevent the front and rear blades from breaking in a strong wind.09-16-2010
20100230966VARIABLE SPEED WIND TURBINE HAVING A CONSTANT SPEED GENERATOR - A variable speed wind turbine including a variable speed rotor, a large constant speed generator, and a small variable speed generator is characterized by a three-shaft variable ratio gearbox connecting the shaft of the rotor with the two generator shafts. The variable ratio gearbox is an epicyclic gearbox which enables the combination of the high performance of a variable speed rotor with the low cost of a large constant speed generator. The torque of the small variable speed generator controls the rotor speed. Variable frequency power conditioning cost is less than that of a prior art variable speed wind turbine, reduced by the ratio of the rated capacity of the small generator to total rated capacity. Also, the small generator enables efficient low wind velocity energy capture. The low rotational inertia of the small variable speed generator further reduces drive train dynamic stress.09-16-2010
20120280500WIND POWER GENERATION SYSTEM AND CONTROL METHOD FOR THE SAME - A wind power generation system 11-08-2012
20120280499Generator Frequency Controlled Load Shifting - In a power generation system that includes a ram air turbine that drives an electric generator and at least one electric bus that couples alternating current electric power from the electric generator to at least one electric load, a method of maintaining the speed of the ram air turbine within a desired range of speeds that comprises the step of uncoupling the at least one electric bus from the electric generator when the frequency of the alternating current falls under a desired minimum frequency.11-08-2012
20120280501WIND POWER GENERATION SYSTEM AND CONTROL METHOD FOR THE SAME - A wind power generation system 11-08-2012
20120091715VERTICAL AXIS WIND TURBINE WITH SPEED REGULATION AND STORM PROTECTION SYSTEM - An embodiment of Vertical Axis Wind Turbine (VAWT) concept with vanes coupled to central shaft thorough supports that are connected in such a way that vanes can be moved closer or further away from the central shaft of the wind turbine. The rotational speed of the wind turbine can be regulated by adjusting the distance of the vanes. Additionally, the turbine can be put into storm protection mode by bringing the vanes right next to the central shaft where the profile of the wind turbine is reduced to minimum.04-19-2012
20120091714WIND PLANT AND METHOD FOR INCREASING ENERGY CAPTURE IN A WIND PLANT - Method for increasing energy capture in wind plants includes providing a plurality of wind turbines having a variable speed control system including an initial rotational speed set point value which is a maximum rotational speed set point for wind turbines. Method includes obtaining at least two measured operational parameters from one or more sensors and comparing measured operational parameters to mechanical load of turbine. If mechanical load of turbine is decreased as a result of measured operational parameters, a speed control adjustment method is activated. Speed control adjustment method includes determining an adjusted rotational speed set point greater than initial rotational speed set point value in response to at least two measured and compared operational parameters and configuring control system with adjusted rotational speed set point where adjusted rotational speed set point increases maximum rotational speed set point of wind turbines.04-19-2012
20120091713Method and system for adjusting a power parameter of a wind turbine - A method for adjusting a power parameter of a wind turbine is disclosed. The method includes determining a load parameter indicative of a mechanical load of the wind turbine; estimating a turbulence of a wind speed based on the determined load parameter; and adjusting the power parameter relating to a power of the wind turbine based on the estimated turbulence. A system for adjusting a power parameter of a wind turbine is also described.04-19-2012
20120091712Wind Powered System for Reducing Energy Consumption of a Primary Power Source - Provided is a wind powered system for reducing energy consumption of a power source, such as an internal combustion engine or an electric motor. In one embodiment, the wind powered system comprises a wind turbine operatively connected to an internal combustion engine, for example via a direct mechanical connection, a hydrostatic drive system or a pneumatic drive system in order to reduce the amount of fuel required by the engine to operate an electricity generating means. A controller may be optionally provided to modulate the load on the wind turbine in order to maximize the extraction of available power according to local wind conditions. In another embodiment, the wind turbine is connected to an air compressor for providing a supply of air in order to offset energy consumption of a conventional compressed air system.04-19-2012
20110309621METHOD FOR CONTROLLING OPERATION OF A WIND TURBINE - A method for controlling operation of a wind turbine and a method for controlling operation of a plurality of wind turbines positioned in a wind farm are disclosed. According to the method, a pitch and rotational speed curve, e.g. a θ versus λ curve, is selected from a group of pitch and rotational speed curve, and the wind turbine is operated in accordance with the selected curve for a short period, while monitoring at least one target parameter, e.g. power production or loads on one or more components. This is repeated for each of the curves of the group of pitch and rotational speed curves. This is also repeated a predetermined number of times, i.e. each curve is selected in turn a predetermined number of times. Based on the monitored target parameters an optimum curve is determined from the group of pitch and rotational speed curve, and the wind turbine is operated in accordance with this optimum curve. The method ensures that the applied curve is in fact optimal for the specific wind turbine, at the specific site and under the specific conditions. Thereby the wind turbine can be operated in a more optimal manner, e.g. with respect to power production and/or loads or wear on components.12-22-2011
20110309620WIND TURBINE GENERATOR AND NACELLE TURNING METHOD - A wind turbine generator is provided with: a nacelle mounting a wind turbine rotor; a yaw drive device generating drive force for causing yaw turning of the nacelle; a brake mechanism generating braking force for braking the turning of the nacelle; a control system controlling the yaw drive device and the brake mechanism; and a wind speed measurement device measuring wind speed. When detecting occurrence of a high wind speed state based on the wind speed while the nacelle is turned by the yaw drive device, the control device provides braking force for the nacelle by using the brake mechanism in response to the detection of the occurrence of the high wind speed state.12-22-2011
20100181768Wind Generator with Folding Mast - Wind generator comprising a folding mast (07-22-2010
20120139248METHOD FOR CONTROLLING A WIND TURBINE - The invention relates to a method for controlling a wind power plant having a rotor (06-07-2012
20120139241DYNAMIC ADJUSTMENT OF POWER PLANT OUTPUT BASED ON ELECTRICAL GRID CHARACTERISTICS - Method, power plant, and computer program product for use in controlling power output by a power plant. The power plant includes a wind farm with a plurality of wind turbines, a grid power converter (such as one or more HVDC links), a sensor to measure the frequency of a power grid, and a supervisory controller. The supervisory controller implements a control algorithm that adjusts the power output from the power plant in response to the frequency of the power grid dropping below a first target frequency by changing the pitch of the blades of at least one wind turbine, increasing the level of a portion of the power contributed by at least one wind turbine, or increasing the level of the power output by the grid power converter.06-07-2012
20120139240METHOD FOR REDUCING LOADS IN A WIND TURBINE - Loads reduction method in a wind turbine for power-grid disconnection during a wind gust, which uses a control system made up of three loops used to correct the speed at which the wind turbine blades are moved to the feathered position throughout a controlled emergency stop, with a non-linear law that takes into account blade position, tower vibrations and generator rotation speed limits.06-07-2012
20130009397WIND POWER GENERATION DEVICE - Provided is a wind power generation apparatus to which general purpose inverters are applicable. An inverter in a constant-voltage mode is used. While a wind power generator is generating electricity, switching circuits are turned on and off at a controlled duty cycles to intermittently short-circuit an armature winding, boosting the voltage and controlling the rotational speed of a windmill rotating blade, with the result that the voltage applied to the inverter is made constant. At the activation, in order to prevent an excessive voltage from being generated while an inverter is changing from the stand-by state to the activated state, ON/OFF control of a switching circuit is performed to switch between the output voltage of a rectifier and the voltage generated at a resistor, with the result that the voltage is controlled and maintained at an appropriate value.01-10-2013
20130015662CONTROL DEVICE FOR A WIND TURBINEAANM Bertolotti; FabioAACI Bad BentheimAACO DEAAGP Bertolotti; Fabio Bad Bentheim DEAANM Van Schelve; JensAACI SchuttorfAACO DEAAGP Van Schelve; Jens Schuttorf DE - The invention relates to a control device for a wind power plant having an electrical system and a rotor including a plurality of rotor blades driven by wind, and outputting a mechanical rotor power to the electrical system. The system converts the mechanical rotor power at least partially into electrical power. The control device includes a blade sensor associated with at least one of the rotor blades and measuring at least one physical property of the rotor blade dependent on at least one characteristic value of a wind field describing the wind at the location of the rotor. The blade sensor generates a blade sensor signal characterizing the physical property. The control device also includes an estimation unit to determine an estimated value for the electrical power as a function of the blade sensor signal.01-17-2013
20130015661Stay Cable for Structures - A mast is erected to support a load. At least one stay cable supports the mast. The stay cable has an end and an opposite end. The end of the stay cable attaches to an upper region of the mast. The opposite end of the stay cable anchors at earth. The stay cable is oriented at an angle not exceeding ten degrees.01-17-2013
20110148115DEEP OFFSHORE FLOATING WIND TURBINE AND METHOD OF DEEP OFFSHORE FLOATING WIND TURBINE ASSEMBLY, TRANSPORTATION, INSTALLATION AND OPERATION - A deep off-shore floating wind turbine apparatus and methods of manufacturing, operating, maintaining, protecting and conveying the wind turbine apparatus. The wind turbine includes a rotor converting a motion of air into a movement of the rotor, a hub housing equipment that transforms the movement of the rotor into a useful form of energy, and a tower supporting the hub on one end. The wind turbine further includes a base floating substantially at water surface and movable with respect to the underlying solid surface. The tower is connected to the floating base on the second end. The wind turbine also includes a tilting mechanism tilting the wind turbine into a substantially horizontal orientation and bringing it back into an upright position, as well as a rotating mechanism operable to control azimuth orientation of the wind turbine.06-23-2011
20130020804PITCH DRIVE DEVICE CAPABLE OF EMERGENCY OPERATION FOR A WIND OR WATER POWER PLANT - A pitch drive device capable of emergency operation by adjusting the rotor blade pitch of a wind or water power plant. The pitch drive device includes an inverter device and a three-phase current drive motor preferably a three-phase IPM synchronous motor. A direct current power storage device can be substantially directly connected to an intermediate direct current circuit, at least for emergency operation, between a rectifier device and the inverter device for at least briefly supplying power to the synchronous motor, so that the IPM synchronous motor can be operated under speed control when the intermediate circuit voltage UZK is falling. The device enables speed-controlled emergency operation of the pitch drive device at high torque when an intermediate circuit voltage UZK is falling in emergency operation, wherein the direct current energy storage device can, improve the efficiency as an energy buffer, and reduce current transfer via the rotor slip ring.01-24-2013
20120242085Motor Yaw Drive System for a Wind Turbine - A yaw-drive system for a wind turbine housed in a movable-in-yaw nacelle affixed atop a tower on a roller bearing. A round-look high-flux core material forms the stator of a circular linear yaw motor. The stator is affixed to the tower and is stationary. A plurality of magnets is affixed to the nacelle in proximity with the core material, such that as the stator is excited in quadrature the nacelle rotates on the roller bearings about a yaw pivot.09-27-2012
20120242084Collapsible Horizontal Axis Wind Generator - A low wind, lightweight horizontal axis wind generator with two adjustable rotor assemblies that include at least one set of lightweight blades that can be manually or automatically unfurled or furled in low, moderate and high winds. In one embodiment, each blade has an airfoil shape in cross-sectional with a rounded leading edge and a thin tailing edge. In a second embodiment, each blade is sail shaped made of one thin cover or panel that assumes a concave cup-like configuration in the wind. In both embodiments, the blade are made of lightweight flexible material supported by an inner frame. In one embodiment, the cover moves longitudinally over the inner frame. In the second embodiment, the cover moves laterally over the inner frame. The unfurling and furl of the blades are controlled by a voltage sensor that constantly measures the voltage output of the generator and/or by wind sensors.09-27-2012
20080265577Power Control of a Wind Park - A method for regulating a wind energy installation including a rotor-driven generator, a converter connected to the generator, and a controller that regulates power emitted into an energy transmission system to within a limit value involves determining a maximum current value in a connection path, determining a current reserve value for power emitted into an energy transmission system, and determining a correction value for following a limit value of the emitted power from the maximum current value and the current reserve value. The wind energy installation and the method for its regulation also includes the use of a limitation device configured to set a phase angle between an emitted current and voltage of an electrical system in response to a selection signal in such a way that primarily active power or primarily reactive power is fed into the energy transmission system when the maximum current value is reached.10-30-2008
20080252076Wind Power Plant Comprising a Reactive Power Module For Supporting a Power Supply System and Corresponding Method - The invention relates to a wind turbine with a rotor, a generator driven by it, which generates electrical power and delivers it to a power system, and a control unit which controls the operation of the plant and has a reactive-power control module. According to the invention, it is provided that the control unit has a determining device for a safe minimum active power. Furthermore, it comprises a limiting device for the reactive-power control module, in such a manner that the reactive power is limited to such a measure that the safe minimum active power is still available, taking into consideration the available apparent power. As a result, the total current generated, apart from the active current required for the safe operation of the plant, can be fed into the power system as reactive current as backup in the case of a voltage drop. The invention is also related to a corresponding method.10-16-2008
20130181449System and Method for Controlling a Variable Speed Ratio Friction Wheel Drive Train on a Wind Turbine - A system and method for controlling operation of a friction wheel drive train for a wind turbine is disclosed. The control system may include a system controller capable of regulating an output rotational speed of one or more generators driven by the drive train, at least one electrical sensor in at least indirect communication with the system controller for providing measurements thereto, at least one electrical contactor for establishing a connection between the one or more generators and a grid and an actuation system in at least indirect contact with the system controller and operating under command thereof to regulate the output rotational speed of the one or more generators.07-18-2013
20130181450METHOD FOR OPERATING A WIND TURBINE - A method for operating a wind turbine is provided. The wind turbine includes a rotor adapted to rotate at an optimal speed. The method includes determining a turbulence parameter; and operating the wind turbine at a speed that is increased by a speed deviation amount as compared to the optimal speed. The speed deviation amount is dependent on the turbulence parameter. A wind turbine (07-18-2013
20130099496OCEAN WAVE ENERGY SYSTEM - An ocean wave energy system for generating power from ocean waves includes a platform supporting an array of hollow columns whose respective lower ends are in fluidic communication with ocean waves and whose respective upper ends are in air communication with a turbine arrangement such that wave motion occurring at the lower ends is operable to cause air movement within the columns for propelling the turbine arrangement to generate power output. The system further includes one or more position-adjustable and/or angle-adjustable submerged structures near the lower ends of the columns for forming ocean waves propagating in operation towards the lower ends of the columns to couple the waves in a controllable manner into the hollow columns.04-25-2013
20130168962Vehicle Based Windmill Apparatus - The present invention generally relates to vehicle based power generation. Specifically, this invention relates to a vehicle based windmill apparatus capable of generating power via a wind turbine attached to an adjustable arm that raises and lowers out of a vehicle, depending on certain variables. The wind turbine can be utilized to generate power during deceleration by using wind force to turn the turbine, which in turn generates power while also having the secondary benefit of creating additional drag to help slow or stop the vehicle.07-04-2013
20130093186WIND-POWER GENERATION SYSTEM AND OPERATION CONTROL METHOD THEREFOR - An object is to improve the accuracy of power factor adjustment. Power-factor command values corresponding to individual wind turbines are determined by correcting a predetermined power-factor command value for an interconnection node using power factor correction levels set for the individual wind turbines.04-18-2013
20130099497APPARATUS AND METHOD FOR REDUCING YAW ERROR IN WIND TURBINES - A wind turbine with a rotor comprising one or more rotor blades and a hub, the hub being attached to a nacelle, a yaw system for rotating the rotor to orient it in a wind direction, and one or more line of sight detectors for detecting a component of wind velocity. The one or more detectors are mounted such that they rotate under the action of the yaw system. A control system is coupled to the one or more detectors and is arranged to compare the detected wind velocity component with a wind velocity value and control the yaw system in response to the comparison. The nacelle can be rotated under control of the control system until the yaw error is substantially zero.04-25-2013
20130113212Wind Power Generator System, and Control Method for the Same - This invention is intended to provide a wind power generator system or method for controlling a wind power generator system, designed to implement switching-initiated smooth energy changeover without leading to a complex system configuration.05-09-2013
20110266799WIND TURBINE GENERATOR SYSTEM - A wind turbine generator system can regulate the rotational velocity of the wind turbine within an operation range even when the wind velocity suddenly changes and can perform continuous operation of the wind turbine. The wind turbine generator system includes a generator connected to the shaft of the wind turbine and a converter connected to the generator. When the rotational velocity of the wind turbine is within a predetermined range, power outputted from the generator is controlled so as to follow the instruction concerning the generator output given from the wind turbine to the converter. When the rotational velocity of the wind turbine is out of the predetermined range, the power outputted from the generator is controlled without following the instruction concerning generator output given from the wind turbine to the converter.11-03-2011
20130127166Central Wind Turbine Power Generation - A wind power conversion apparatus for efficiently generating electric power is disclosed. The apparatus includes at least one blade, the at least one blade being configured to rotate when exposed to wind, a fluid pump mechanically coupled to the at least one blade and configured to pressurize fluid from a low pressure fluid to a high pressure fluid, a fluid motor fluidly coupled to the fluid pump and configured to rotate an output shaft in response to the high pressure fluid and thereby providing the low pressure fluid, and an electric generator mechanically coupled to the fluid motor and configured to generate electric power in response to the rotation of the output shaft of the fluid motor.05-23-2013
20130127165WIND POWER ELECTRICITY GENERATING SYSTEM AND RELATIVE CONTROL METHOD - A snow groomer, equipped with a winch assembly to aid handling of the snow groomer on steep slopes, has a frame; a user interface; a control unit; and the winch assembly, which has a support structure fixed or connected to the frame, a drum that rotates with respect to the support structure about an axis, a cable fixed or connected at one end to the drum and wound about the drum, an actuator assembly for rotating the drum about the axis, and a sensor for determining the position of the drum about the axis; the control unit being configured to control the cable as a function of the position of the drum and the geometry of the drum.05-23-2013
20130134710SYSTEM AND METHOD FOR CONVERTER SWITCHING FREQUENCY CONTROL - A system for power conversion includes a power converter having switching elements, a detector, and a controller is provided. The detector detects a parameter and provides electrical signals indicative of the parameter. The controller receives the electrical signals transmitted from the detector, and sends commands to instruct the power converter to perform power conversion by operating the switching elements in accordance with switching signals at a different frequency in response to a detection of the system condition. A method for operating the system is also provided.05-30-2013
20130140817CONTROL SYSTEM FOR A WIND PARK - A control system for a wind park includes a plurality of limit controllers. Each limit controller is configured to output a limit value set based upon a specific grid code requirement. A selection unit compiles a limit value set from the plurality of limit value sets according to a number of grid code requirements. The control system further includes a plurality of main controllers, wherein a main controller is configured to generate a setpoint for one or more wind turbines of the wind park according to the compiled limit value set. Further, a wind park and a method of controlling a wind park are provided.06-06-2013
20130140818CONTROLLING OF NOISE EMISSON OF A WIND PARK - A method of controlling noise emission of a wind park includes monitoring noise emitted from the wind park by detecting and identifying noise emitted by some or all of the plurality of the wind park's wind turbines and estimating the level thereof. If the level of the monitored noise exceeds a predetermined noise threshold the wind park controller commands one or more of the wind turbines, chosen by the importance of its or their relative influence on the noise emitted from the wind park to the measuring location, to change operation to an operation mode with reduced noise emission.06-06-2013
20130140819METHOD FOR OPERATING A WIND TURBINE AT IMPROVED POWER OUTPUT - A method for operating a wind turbine is disclosed. The wind turbine comprises a rotor having a set of wind turbine blades, said rotor being mounted on a tower. The method comprises the steps of: Providing a curve defining optimal pitch angle as a function of tip speed ratio for the wind turbine blades or as a function of wind speed. Modifying at least a part of said optimal pitch angle curve by applying a safety buffer, e.g. at tip speed ratios and/or pitch angles where there is a risk that the blades may stall and/or that overload is caused to the wind turbine, thereby obtaining a safety modified pitch angle curve. Operating the wind turbine in accordance with the safety modified pitch angle curve. Measuring one or more parameters providing information regarding wind conditions and/or loads on one or more components of the wind turbine, during operation of the wind turbine. Adjusting the safety buffer, based on said measurements, thereby obtaining an adjusted pitch angle curve, and operating the wind turbine in accordance with the adjusted pitch angle curve. The safety buffer is applied in order to ensure that the blades of the wind turbine do not stall and/or that the wind turbine is not overloaded, but it has the effect that the wind turbine is operated in a suboptimal manner from an energy production view. Since the safety buffer is adjusted based on measured parameters, it can be reduced if it is detected that the actual operating conditions are less severe than expected. This allows the wind turbine to be operated in a more optimal manner, thereby increasing the energy production of the wind turbine.06-06-2013
20130140820WIND-POWER PRODUCTION WITH REDUCED POWER FLUCTUATIONS - A method of operating at partial load a wind turbine (06-06-2013
20090008938SYSTEMS AND METHODS FOR SYNCHRONOUS SPEED AVOIDANCE IN DOUBLY-FED INDUCTION GENERATORS - The disclosure details implementations of apparatuses, methods, and systems for facilitating efficient operational characteristics for wind turbine generators. The system includes features that facilitate protecting the power semiconductors used in the power converters of variable speed power generation systems from excessive junction temperatures. These features may be achieved by implementing a synchronous speed avoidance (SSA) controller implemented to facilitate a determined active control range as an electrical torque/power-generator rotor speed controller. The determined active control range may be centered around a generator synchronous speed. The upper and lower bounds of the active control range are determined based on operational junction temperature characteristics of power semiconductors used within a power converter, reliability characteristics of the power semiconductors and/or current ratings of the power semiconductors.01-08-2009
20080203730Wind power generator with biased transmission arrangement - In a wind power generation installation comprising a rotor with rotor blades mounted on a tower and connected via a transmission to a generator for generating electric power, an electric machine operable as a motor is also connected to the transmission for applying a driving torque to the transmission so as to bias the transmission so as to hold the gears of the transmission in constant engagement in order to prevent the detrimental effects of torque variations on the gears of the transmission.08-28-2008
20110210551METHOD AND SYSTEM FOR TESTING A MECHANICAL BRAKE OF A WIND ROTOR SHAFT OF A WIND TURBINE - The present disclosure relates to a method for testing a mechanical brake of a wind rotor shaft of a wind turbine, including: applying a predetermined desired brake torque to the mechanical brake; applying a predetermined drive torque to the wind rotor shaft by a motor; and, measuring a parameter indicative the rotational speed of the wind rotor shaft; and, determining the performance based on the measured value of parameter indicative for the rotational speed.09-01-2011
20080197633METHOD AND APPARATUS FOR A SUPERCONDUCTING GENERATOR DRIVEN BY WIND TURBINE - A generator including: an annular armature connectable to rotate with blades of a wind turbine; an annular stationary field winding assembly coaxial with the armature and separated by a gap from an inside surface of the armature, wherein the field winding include superconducting coils, and support structure connectable to an upper region of a tower of the wind turbine.08-21-2008
20110221195SYSTEM AND METHOD FOR POWER CONVERSION - A multilevel inverter is provided. The multilevel inverter includes a plurality of bridges, each bridge configured to receive a respective portion of an input DC power and convert the respective portion to a respective converted AC power. The multilevel inverter also includes at least one bridge controller for operating at least one of the plurality of bridges in a square waveform mode. The multilevel inverter further includes a plurality of transformers, each transformer coupled to a respective bridge and configured to increase a voltage level of the respective portion of converted AC power. The plurality of transformers further includes secondary windings coupled in series with the other secondary windings to combine the respective increased voltage level portions of the converted AC power. The multilevel inverter also includes a grid converter configured to provide output power for a power grid.09-15-2011
20090278354Wind turbine generator system - In a wind turbine generator system including an AC exciting converter a grid side converter, and a controller configured to control the AC-exciting converter and the grid side converter, the controller operates a short-circuiting circuit when decrease in the grid voltage and increase in the DC voltage are detected.11-12-2009
20090134625POWER BACKUP SYSTEM FOR OFFSHORE WIND GENERATORS - The inventions concerns a cable comprising a cable jacket and at least two medium voltage wires disposed within the cable jacket for transporting medium voltage current and at least two low voltage wires disposed within the cable jacket for transporting a low voltage current. Further, it concerns a wind turbine having a generator for generating electricity, wherein the generator being electrically connected to at least two medium voltage wires for feeding the generated electricity into a grid, the wind turbine having further a low voltage network for providing low voltage power to low voltage consumers, the low voltage network being electrically connected to a low voltage cable, wherein the low voltage cable and the medium voltage wires are accommodated in a common cable jacket. Finally it concerns a wind park comprising at least two wind turbines, each of the wind turbines having a generator for generating electricity, wherein the generator being electrically connected to at least two medium voltage wires for feeding generated medium voltage current to a grid, the wind turbines having further a low voltage network for providing low voltage power to low voltage consumers of the wind turbine, the low voltage network being electrically connected to a low voltage cable, wherein the low voltage cable and the medium voltage wires are accommodated in a common cable jacket.05-28-2009
20130147194ELECTRICITY GENERATION SYSTEM THAT WITHSTANDS VOLTAGE DIPS - The invention comprises a doubly-fed generator (06-13-2013
20130147195METHOD AND SYSTEM FOR ADAPTING THE LOAD ON AN ELECTRIAL AND/OR ELECTRONIC COMPONENT IN A WIND TURBINE - A method is provided for adjusting the stress on an electrical and/or electronic subassembly in a wind turbine. The method includes determining for the electrical and/or electronic subassembly an expected service life up to the point when a maintenance indicator value is reached, which represents a state of the subassembly at which, on the basis of conditions defined in advance, the subassembly should be maintained The method also includes comparing the expected service life against the time point for the next maintenance of the wind turbine. The method further includes controlling the wind turbine and/or at least one other wind turbine in an area around the wind turbine in such a way that the stress on the electrical and/or electronic subassembly is reduced.06-13-2013
20100283245WIND TURBINE - For optimising annual energy production in a wind turbine, the invention provides a method by which operation of the turbine in accordance with different pre-specified modes depending on the wind direction towards the turbine is enabled. The modes may include pitch and/or power control strategies. The invention further provides a control system for a wind turbine adapted to operate in accordance with the method, and a wind turbine with such a control system.11-11-2010
20100301607UPWIND WIND TURBINE AND OPERATION METHOD THEREOF - An upwind wind turbine (12-02-2010
20130175798SYSTEMS AND METHODS FOR PRODUCING, SHIPPING, DISTRIBUTING, AND STORING HYDROGEN - These inventions related to systems and methods for producing, shipping, distributing, and storing hydrogen. In one embodiment, a hydrogen production and storage system includes a plurality of wind turbines for generating electrical power; a power distribution control system for distributing, and converting the electrical power from the wind turbines, a water desalination and/or purification unit which receives and purifies seawater, and an electrolyzer unit that receive electrical power from the power distribution system and purified water from the desalination units and thereby converts the water into hydrogen and oxygen. After its production, hydrogen is stored, transported, and distributed in accordance with various embodiments.07-11-2013
20130175799Wind Power Plant and Method for the Controlled Shutdown of a Wind Power Plant - The invention relates to a wind power plant having a main controller. A set of condition parameters is fed to the main controller. The main controller determines settings for the operation of the wind power plant from the condition parameters. According to the invention, a minimal controller and a monitoring module are further provided. The minimal controller determines a setting for the pitch angle and/or pitch speed from a subset of the condition parameters. In the event of an error in the processing of the main controller, the monitoring module transfers the control over the wind power plant to the minimal controller. The invention further relates to a method for operating such a wind power plant. The wind power plant can be shut down in a controlled manner by means of the minimal controller according to the invention if an error occurs in the main controller.07-11-2013
20130175800WIND FARM AND METHOD FOR OPERATING A WIND FARM - A method for operating a wind farm and to a wind farm is disclosed. When a wind farm and the wind energy installations involve target values for the reactive power being prescribed by a farm regulatory device, said target values for the reactive power ignored by the control units when controlling the respective wind energy installation in the event of a power supply system fault in the power supply system. Only when the power supply system fault has been rectified are said target values considered by the control units again for controlling the respective wind energy installation.07-11-2013
20130175801WIND FARM AND METHOD FOR OPERATING A WIND FARM - A method for operating a wind farm comprising several wind turbines that are connected to an internal grid of the wind farm is disclosed. In said method, during a mains failure the electrical consumers of the wind turbines are supplied with electrical energy by a mains replacement supply unit. Each electrical consumer of the wind turbines is assigned to one of at least two groups and according to the group assignment is always switched on by an operation control unit when required, or only switched on if there is a sufficient power reserve. The wind farm is designed to carry out said method.07-11-2013
20120274068ATMOSPHERIC ENERGY EXTRACTION DEVICES AND METHODS - An apparatus for producing electricity includes a tower capable of adding moisture at the top of the tower to hot-dry air so as to generate a downdraft of wind within the interior of the tower, vanes coupled to the exterior of the tower that at least partially define a plurality of elongated pockets at the exterior of the tower, flaps located within the pockets configured to redirect incident wind downwards, and at least a first wind tunnel configured to receive the redirected incident wind so as to convert such wind to electricity.11-01-2012
20120274067WIND TURBINE GENERATOR - An object of the present invention is to provide a wind turbine generator in which a communication channel can be added in communication between a hub and a nacelle, without making a modification to the design of a silo ring. The present invention provides a wind turbine generator in which communication between the hub and the nacelle is performed by superimposing an into signal onto AC power carried over an AC power line between the hub and the nacelle via the slip ring.11-01-2012
20100314876WIND TURBINE SOLAR CONTROL SYSTEM - The present invention is a wind turbine solar control system. This system may be applied to various types of wind turbines that use a start-up motor or will be able to be turned efficiently using a sun powered motor. A rechargeable battery is used to hold enough power to start the propeller for a predetermined amount of time. Wind sensors will be included to determine if enough wind is present to turn the propeller on. A control box may be included to designate when to turn the motor on and off. It also controls how much to charge the battery and regulates when to stop charging.12-16-2010
20100314875SYSTEM AND METHOD FOR CONTROLLING A WIND TURBINE - A system for controlling the RPM of a wind turbine comprising using inverters to draw current from the wind turbine, thereby slowing the rotational speed of the wind turbine blades. In another aspect, a resistor and a switching mechanism attached between the resistor and a phase line is provided to increase the load on the phase line. A yaw motor is also used to yaw the facing direction of the wind turbine out of the wind. Moreover, a normally closed switching mechanism can redirect current from a phase line through a resistor. A normally closed brake is also used to mechanically engage the turbine when the control system fails. A normally open yawing clutch when disengaged allows the nacelle of the wind turbine to rotate freely into the down wind direction. The system also comprises a switch that can create an electrical short between the phase lines of the turbine.12-16-2010
20100314874SYSTEM AND METHOD FOR OPERATING A WIND ENERGY INSTALLATION OR WIND FARM - A system and method for operating a wind energy installation or wind farm. The system includes a control unit configured to process control variables and a transfer module. The transfer module has an input interface for receiving control commands and an output interface for transmitting control variables to the control unit. The transfer module has multiple transfer logic elements each configured to convert a control command to a control variable. The transfer module has a switching device for switching between the transfer logic elements. As a result, the wind energy installation or wind farm can be connected to an electrical grid in which the control commands are transmitted in a different format than that of the control variables of the control unit.12-16-2010
20100314873Auxiliary drive/brake system for a wind turbine - An auxiliary drive/brake system for a wind turbine includes an impulse, high torque motor, a gearbox transmission, a drive shaft, and a transfer gearbox that connects to either the wind turbine low-speed shaft or to the wind turbine gearbox. Control of the auxiliary drive/brake system is performed by a programmable computer-based motor drive control system in combination with instrumentation and sensors fitted to the rotating wind turbine components. Torque and horsepower created by the present auxiliary drive/brake system is transferred into the wind turbine low-speed shaft where it combines with the torque and horsepower created by the wind acting on the wind turbine rotor blades, the combined torque and horsepower is transferred from the wind turbine low-speed shaft into the wind turbine gearbox and the wind turbine generator, causing the wind turbine generator to operate and produce electricity which is supplied to the power company.12-16-2010
20130154263METHOD AND SYSTEM FOR NOISE-CONTROLLED OPERATION OF A WIND TURBINE - A method for noise-reduced operation a wind is provided. The method includes determining a wind speed during normal operation of the wind turbine and determining a weighted rotor speed setpoint for a rotor of the wind turbine so that a noise emission of the wind turbine for the wind speed is reduced compared to nominal noise emission of the wind turbine at the wind speed. Using the weighted rotor speed setpoint, a torque setpoint for a power conversion assembly connected to the rotor is determined. The torque setpoint is applied to the power conversion assembly to control the wind turbine.06-20-2013
20130154262QUICK START-UP OF WIND TURBINE GENERATORS - A wind farm is provided that is capable of quickly starting up without delay after an electrical grid becomes available after an outage. According to one embodiment, the wind farm comprises one or more main WTGs and an auxiliary WTG having a substantially lower start-up energy requirement than the one or more main WTGs. The auxiliary WTG is coupled to supply power to the one or more main WTGs to prepare the one or more main WTGs for start-up.06-20-2013
20130181451WIND ENERGY INSTALLATION AND METHOD FOR OPERATING A WIND ENERGY INSTALLATION WITH TEMPERATURE MONITORING FOR THE TRANSFORMER - A wind turbine having a generator for generating electrical energy and a transformer is disclosed. The transformer is designed to receive electrical energy from the generator on a secondary side and to discharge said electrical energy again on a primary side at a higher voltage. The wind turbine also comprises a temperature monitoring means for the transformer. The voltage supply to the temperature monitoring means is fed from the primary side of the transformer. The temperature monitoring means is thereby independent of the control system of the wind turbine. The temperature monitoring means reduces the risk of the transformer overheating. A method for operating such a wind turbine is also disclosed.07-18-2013
20130119663WIND TURBINE WITH ADDITIONAL ROTOR MOMENT OF INERTIA AND A METHOD FOR CONTROLLING A WIND TURBINE WITH ADDITIONAL ROTOR MOMENT OF INERTIA - This invention relates to a wind turbine having an additional mass each placed between a mounting end and a free end of at least two rotor blades. This invention further relates to a method for controlling a wind turbine with a pitch system for pitching a blade in a pitch angle and with blades with a mass for increased inertia, which wind turbine is operated in a normal operation mode in which a generator has a generator speed at a generator torque, and which wind turbine is to remain electrically coupled to a grid during a low voltage condition and with supplied current specifications, torque reference, power references, or according to a grid code.05-16-2013
20110291415WIND TURBINE AND METHOD FOR MONITORING THE GAP LENGTH BETWEEN A ROTOR AND A STATOR OF THE WIND TURBINE GENERATOR - Wind turbine comprising a generator section with a generator rotor and a generator stator. A first air gap is defined between a first surface of the generator rotor and the stator, and magnets and electro conductive windings are provided at opposite sides of the first air gap to create a magnetic field over the first air gap during operation. The wind turbine comprises distance measurement means arranged to measure the radial length of a second air gap defined between a second surface of the generator rotor and a stationary part of the generator section. The second air gap is located at a radial distance from the first air gap at a position where there is no interference of a magnetic field generated by the magnets over the first air gap, and the length of the second air gap corresponds directly to the length of the first air gap. This enables accurate measurement and monitoring of the air gap length. A method for monitoring the gap length between a rotor and a stator of a wind turbine generator is also disclosed.12-01-2011
20110309622WIND TURBINE GENERATOR, ACTIVE DAMPING METHOD THEREOF, AND WINDMILL TOWER - A wind turbine generator, an active damping method thereof, and a windmill tower in which vibrations of the wind turbine generator itself or the windmill tower can be reduced at low cost are provided. The acceleration due to vibrations of a nacelle is detected with an accelerometer attached to the nacelle. In an active damping unit, a pitch angle of windmill blades for generating a thrust on the windmill blades so as to cancel out the vibrations of the nacelle is calculated on the basis of the acceleration, and the pitch angle is output as a blade-pitch-angle command δθ* for damping. On the other hand, in a pitch-angle control unit, a pitch angle of the windmill blades for controlling the output to be a predetermined value is calculated, and the pitch angle is output as a blade-pitch-angle command θ* for output control. The blade-pitch-angle command δθ* for damping is combined with the blade-pitch-angle command θ* for output control using a subtracter. The pitch angle of the windmill blades is controlled on the basis of the resulting blade-pitch-angle command after combining.12-22-2011
20130187382METHOD AND APPARATUS FOR CONTROL OF REDUNDANT DEVICES IN A WIND TURBINE - A method and apparatus for control of redundant devices in a wind turbine is provided, comprising operating a first redundant device and at least one other redundant device such that the first redundant device is expected to fail before any of the at least one other redundant devices.07-25-2013
20130187383SYSTEM AND METHOD FOR OPERATING A WIND TURBINE USING ADAPTIVE REFERENCE VARIABLES - It is described an arrangement for determining a target value of an operational variable of a wind turbine, the arrangement comprising: at least one input terminal for receiving at least one operational parameter of the wind turbine; a determining unit adapted to determine a target value of an operational variable of the wind turbine based on the operational parameter. Further, a corresponding method and a wind turbine are described.07-25-2013
20130187384METHOD OF OPERATING A WIND TURBINE, WIND TURBINE, WIND TURBINE CONTROLLING SYSTEM, AND PROCESSING SYSTEM - According to an embodiment, a method of operating a wind turbine comprising a DC-to-AC voltage converter is provided, the wind turbine being connectable to a grid via the DC-to-AC voltage converter, the method comprising: determining a line voltage of a power line connecting the DC-to-AC voltage converter to the grid; if the determined line voltage exceeds a predefined voltage threshold value, injecting reactive current into the power line, wherein the amount of reactive current injected is chosen such that an output voltage of the DC-to-AC voltage converter is kept within a predetermined voltage range.07-25-2013
20130187385WIND-TURBINE-GENERATOR CONTROL SYSTEM, WIND TURBINE GENERATOR, WIND FARM, AND WIND-TURBINE-GENERATOR CONTROL METHOD - A turbine controller of a wind turbine generator includes a generated-output-power command value creating section that creates a generated-output-power command value and an optimum-upper-and-lower-limit limiting section that limits the generated-output-power command value by means of an upper limit value and a lower limit value of the generated output power that are determined based on a power curve indicating the relationship between the generated output power and the rotational speed of the generator. Furthermore, the turbine controller includes a limit-value creating section that creates, when the grid frequency is increased above a predetermined reference frequency, a frequency-dependent limit value serving as an upper limit value of the generated-output-power command value, according to the increase in grid frequency; and a first upper-limit limiting section that limits the upper limit value of the generated-output-power command value limited by the optimum-upper-and-lower-limit limiting section, by means of the frequency-dependent limit value.07-25-2013
20120286511WIND TURBINE GENERATOR SYSTEM - A wind turbine generator system can regulate the rotational velocity of the wind turbine within an operation range even when the wind velocity suddenly changes and can perform continuous operation of the wind turbine. The wind turbine generator system includes a generator connected to the shaft of the wind turbine and a converter connected to the generator. When the rotational velocity of the wind turbine is within a predetermined range, power outputted from the generator is controlled so as to follow the instruction concerning the generator output given from the wind turbine to the converter. When the rotational velocity of the wind turbine is out of the predetermined range, the power outputted from the generator is controlled without following the instruction concerning generator output given from the wind turbine to the converter.11-15-2012
20120019001WIND TURBINE, DRIVE TRAIN ASSEMBLY, WIND TURBINE NACELLE SYSTEM, METHODS FOR CONVERTING ROTATIONAL ENERGY AND METHODS FOR BUILDING A NACELLE AND FOR RE-EQUIPPING A WIND TURBINE - A wind turbine with a drive train connecting a drive unit with a generator assembly is provided. The generator assembly includes a first generator with a first stator and a first rotor, the first rotor being directly connected to the drive train, and at least a second generator indirectly coupled to the drive train via a gear box. Further, a drive train assembly, a wind turbine nacelle system, a method for converting rotational energy into electrical energy, a method of building a nacelle and methods of re-equipping a wind turbine are provided.01-26-2012
20130193686SYSTEM AND METHODS FOR DETERMINING PITCH ANGLES FOR A WIND TURBINE DURING PEAK SHAVING - A method for determining pitch angles for at least one rotor blade of a wind turbine during peak shaving is disclosed. The method may generally include receiving a signal with a controller associated with a peak shaving parameter of the wind turbine and determining a target pitch angle for the at least one rotor blade based on a mathematical relationship between the target pitch angle and the peak shaving parameter, wherein the mathematical relationship is modeled as a non-linear function.08-01-2013
20120043758METHOD OF DETERMINING A PHASE VALUE OF A PHASE ASSOCIATED WITH AN OSCILLATORY TOWER MOVEMENT OF A TOWER OF A WIND TURBINE, DEVICE FOR DETERMINING A PHASE VALUE OF A PHASE ASSOCIATED WITH AN OSCILLATORY TOWER MOVEMENT OF A TOWER OF A WIND TURBINE, AND METHOD OF OPERATING A WIND TURBINE - A method is provided of determining a phase value of a phase associated with an oscillatory tower movement of a tower of a wind turbine. The method includes measuring a quantity representative of the oscillatory tower movement, and determining the phase value based on the measured quantity. In an exemplary embodiment, the determination of the phase value is includes applying a Fourier Transformation on the measured quantity.02-23-2012
20130200620WIND TURBINE - A wind turbine is provided. The wind turbine includes a generator, an output thereof being connectable to a power grid via a power transmission path, the power transmission path comprising a generator side converter coupled to the output of the generator, a grid side converter coupled to the power grid, and a DC link coupled between the generator side converter and the grid side converter. For diverting the generator power, a load dump arrangement is provided which includes at least one resistor, a plurality of switches, and a plurality of electrical connections which electrically connect the at least one resistor to the output of the generator and across the DC link via the plurality of switches. One common and configurable load dump is used for both converter system failures and grid failures. As compared to two separate load dumps for converter failures and grid failures, the single load dump will require a smaller space for a wind turbine. Thus, the weight and size of the power converter system may be reduced.08-08-2013
20130200619ELECTRIC GENERATOR CONTROL SYSTEM AND METHOD - The invention describes a system and a method for controlling an electric generator connected to the power grid during a voltage drop in the power grid, the system comprising a back-to-back converter (08-08-2013
20130200621METHOD AND ARRANGEMENT FOR CONTROLLING A WIND TURBINE USING OSCILLATION DETECTION - A method for controlling a wind turbine is provided. The method includes monitoring an electrical quantity at an output terminal of the wind turbine. The electric quantity has an amplitude and periodically varying with a grid frequency. The method further includes detecting an oscillation of the amplitude and decreasing active power output from the wind turbine at the output terminal depending on the detected oscillation.08-08-2013
20130200618HIGH EFFICIENCY WIND TURBINE - A wind driven generator may have a first rotating element associated with a first set of vanes distributed so as to be driven by wind in a first rotational direction about an axis of rotation. A second element is associated with a second set of vanes distributed so as to be driven by the wind in a second rotational direction opposite to the first rotational direction concentric with the axis of rotation of the first rotating element. The first rotating element has magnetic elements disposed thereon that project a magnetic field towards and onto the second rotating element. The second rotating element has electromagnetic coils disposed thereon, the electromagnetic coils being exposed to the magnetic field projected from the first rotating element.08-08-2013
20120061962BLADE PITCH CONTROL SYSTEM, WIND TURBINE GENERATOR, AND BLADE PITCH CONTROL METHOD - A wind turbine generator generates power through rotation of a rotor to which a plurality of blades are pivotally coupled and includes a pitch-angle control section that outputs a pitch-angle command value that indicates the amount of change in the pitch angle of each of the blades, hydraulic cylinders each of which changes the pitch angle of the corresponding blade based on the corresponding pitch-angle command value output from the pitch-angle control section, and load measurement sections that measure blade-root loads. A set value indicating that wind received by the wind turbine generator has a biased wind speed distribution is set in advance in the pitch-angle control section. Only when a calculated pitch-angle command value exceeds the set value, the pitch-angle control section outputs a pitch-angle command value beyond pitch command limit values. Therefore, in the wind turbine generator, a higher load than necessary is not imposed on a drive unit for the pitch angle of each of the blades in a case of a normal wind speed or a wind speed distribution caused by the normal wind speed, and the blade-root load can be sufficiently reduced even in a case of a wind speed distribution that occurs when a strong wind is received.03-15-2012
20120074700SYSTEM AND ASSEMBLY FOR POWER TRANSMISSION AND GENERATION IN A WIND TURBINE - Various power transmission and generation systems and assemblies are provided for a wind turbine. In one embodiment, a power generation system is provided including a transmission having an input axially aligned with an output, the input configured to receive rotary motion generated by a wind driven rotor head, the input located downwind of the output, an electromagnetic apparatus having an input configured to be coupled to the transmission output, and a bearing configured to radially support both the transmission output and the electromagnetic apparatus input. In this way, a common bearing may support both the transmission and electromagnetic apparatus, allowing for a more compact and efficient design while retaining service and repair capabilities.03-29-2012
20130207391VARIABLE SPEED ELECTRIC MACHINE AND METHOD FOR GENERATING ELECTRIC ENERGY - A variable speed electric machine and a method for generating electric energy is provided. The electric machine includes an outer stator with a first set of field windings. Further, the electric machine includes a modulator outer rotor that is concentric and is located proximate to the outer stator. The modulator outer rotor is operatively coupled to an input shaft. Furthermore the electric machine includes a permanent magnet inner rotor concentric to the modulator outer rotor. The electric machine also includes an inner stator with a second set of field windings. The inner stator is concentric to the inner rotor and is operatively coupled to an electric grid. The outer stator, the modulator outer rotor, inner stator and the inner rotor are magnetically coupled with each other so as to maintain a constant electric frequency at the inner stator.08-15-2013
20130207392SYSTEM AND METHOD FOR OPERATING WIND FARM - Systems and methods for operating a wind farm are disclosed. The wind farm includes a wind generator. The method includes detecting an atmospheric condition at a location spaced apart from the wind generator, and communicating a control signal to the wind generator. The control signal is based on the atmospheric condition. The method further includes adjusting the wind generator according to the control signal before the atmospheric condition is experienced by the wind generator.08-15-2013
20130207393WIND FARM HARMONIC PREDICTOR AND METHOD FOR PREDICTING HARMONICS - A harmonic predictor for a wind farm comprising at least two wind turbines, each having a generator with a converter for generating electrical energy. The harmonic predictor determines the harmonic component expected from the wind farm in order to limit the harmonic component to a harmonic limit. The harmonic predictor comprises a calculation module, an iteration module and a summing module. The calculation module calculates a complex mean value over at least one period of the harmonic component of one of the wind turbines and determines a first equivalent vector therefrom. The iteration module successively connects the calculation module to at least one other of the wind turbines to form at least one second equivalent vector. The summing module sums the equivalent vectors to form a total vector and compares the total vector with the harmonic limit.08-15-2013
20130207394GENERATOR TORQUE CONTROL METHODS - A wind turbine typically includes a generator and a rotating mechanical system having a natural period. The present invention relates to a method of controlling generator torque that minimises oscillations in the speed of the generator rotor. In the event of a grid fault or transient, or a fault in the power converter, the generator torque is decreased at a substantially constant rate with respect to time as shown in graph (c). The rate at which the generator torque is decreases is proportional to the nominal rated torque of the generator and inversely proportional to an integer multiple of the natural period of the rotating mechanical system.08-15-2013