| REPOWER SYSTEMS AG Patent applications |
| Patent application number | Title | Published |
|---|
| 20120107129 | ROTOR BLADE OF A WIND POWER PLANT AND METHOD FOR FABRICATING A ROTOR BLADE OF A WIND POWER PLANT - A rotor blade ( | 05-03-2012 |
| 20120107128 | ROTOR BLADE OF A WIND POWER PLANT, METHOD OF FABRICATING A ROTOR BLADE AND A PAIR OF BELTS FOR A ROTOR BLADE - The invention relates to a rotor blade ( | 05-03-2012 |
| 20120006578 | WIND ENERGY PLANT HAVING A TWISTABLE NACELLE CABLE GUIDE - A wind energy installation includes a tower and a nacelle arranged at the top of the tower such that it can swivel in the azimuth direction. The installation also includes a plurality of cables which are guided via a loop from the tower into the nacelle, the cables being held at a distance from one another in the loop by means of rotationally fixed and loose holders. The holders each have receptacles for attachment of the cables with a predetermined circumferential separation. The holders include a lower rotationally fixed guide ring and an aligning upper loose guide ring. A loop guide is formed such that the loop is subdivided by means of the rotationally fixed lower guide ring into a curved untwisted area and an extended twisted area. | 01-12-2012 |
| 20110288817 | Method of Servicing Wind Power Plant Using Azimuth Angle - The invention concerns a method for the determination of an azimuth angle for servicing purposes (α | 11-24-2011 |
| 20110262281 | PROFILE OF A ROTOR BLADE AND ROTOR BLADE OF A WIND POWER PLANT - The profile ( | 10-27-2011 |
| 20110238371 | METHOD FOR BRAKING STATE MONITORING AND WIND ENERGY INSTALLATION FOR CARRYING OUT THE METHOD - A method for determining the state of a braking apparatus of a wind energy installation can include obtaining data relating to load behavior of the braking apparatus, recording a measured value during a time period between a start of a braking process and an end of the braking process, and determining a brake state characteristic value based on the data and the measured value. A wind energy installation for performing the method can include a braking apparatus, a sensor, a control unit configured to instruct the sensor to record a measured value in a time period between a start of a braking process and an end of a braking process, a data memory configured to store data relating to load behavior of the braking apparatus, and a computation module configured to determine a brake state characteristic value based on the data and the measured value. | 09-29-2011 |
| 20110233819 | DEVICE AND PARTIAL MOLD FOR THE PRODUCTION OF ROTOR BLADES FOR WIND POWER PLANTS AND METHODS FOR THE PRODUCTION - A device for the production of rotor blades ( | 09-29-2011 |
| 20110229333 | SHEAR WEB CONNECTION - A shear web ( | 09-22-2011 |
| 20110211971 | ROTOR BLADE FOR A WIND POWER PLANT, WIND POWER PLANT AND METHOD FOR THE PRODUCTION OF A ROTOR BLADE - A rotor blade ( | 09-01-2011 |
| 20110204542 | METHOD AND DEVICE FOR APPLYING A REFERENCE MARK ON A ROTOR BLADE FOR A WIND POWER PLANT - A method, a device ( | 08-25-2011 |
| 20110175620 | WIND ENERGY PLANT TESTING DEVICE - A wind energy installation test device for defined production of grid system faults, and a method thereof. The test device can include an output configured to connect to a wind energy installation, an input configured to connect to a grid system, and a switching device for connection of an electrical disturbance component relating to a grid system parameter. An autotransformer can be used for the electrical disturbance component. The grid system in a sound state can be connected to a primary winding connection and the grid system in a disturbed state with respect to the grid system parameter can be output at a secondary winding connection. | 07-21-2011 |
| 20110142679 | ROTOR BLADE FOR A WIND TURBINE, METHOD AND MANUFACTURING MOLD FOR THE PRODUCTION THEREOF - A rotor blade and a method and a manufacturing mold for the production of a rotor blade for a wind turbine, which extends longitudinally in the operational state from a blade root area to the connection to a rotor hub of the wind turbine and which is divided into at least two segments for its production, wherein at least one subdivision is provided approximately transverse to its longitudinal extension between the blade root area and the blade tip. The method facilitates and shortens the production of the rotor blade, in particular for a series production and to still provide the completed rotor blade as a familiar uniform rotor blade. In the method, the at least two segments, preferably after they have been at least partially produced or partially produced mainly parallel in time, are interconnected in an integration device. | 06-16-2011 |
| 20110135486 | BELT OF A ROTOR BLADE OF A WIND POWER PLANT | 06-09-2011 |
| 20110103963 | ROTOR BLADE WITH DRAINAGE BORE HOLE - The invention relates to a method for the production of a rotor blade ( | 05-05-2011 |
| 20110101690 | Wind 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 |
| 20110100542 | METHOD AND MANUFACTURING MOLD FOR THE PRODUCTION OF A ROTOR BLADE FOR A WIND TURBINE - A manufacturing mold for the production of a rotor blade for a wind turbine, where at least in one region of its longitudinal extension between a rotor blade root and a rotor blade tip, the finished rotor blade has an aerodynamic cross-sectional profile that has a profile leading edge (nose) and a profile trailing edge which are connected together via a suction side and a pressure side of the cross-sectional profile. A manufacturing mold can be divided along at least one separation plane which extends in the longitudinal direction of the rotor blade and between the profile leading edge and the profile trailing edge while simultaneously dividing the suction side and the pressure side, into a manufacturing mold part for producing a rotor blade part having the profile leading edge, and into a manufacturing mold part for producing a rotor blade profile part having the profile trailing edge. | 05-05-2011 |
| 20110100533 | METHOD AND PRODUCTION OF A ROTOR BLADE FOR WIND ENERGY PLANT - A method for producing a rotor blade for a wind power plant that in operational condition extends longitudinally from an area at the blade root for the connection at a rotor hub of the wind power plant, up to a blade tip, and that for its production is divided into at least two segments. The production of the rotor blade is facilitated and to the time required, is shortened especially for a series production. For its production, the rotor blade is segmented into more than two segments, that at least for a few of these segments separate manufacturing molds are provided that can be used temporally in parallel, and that for the final production of the rotor blade, the segments are connected together outside of a manufacturing mold into a rotor blade or a rotor blade part. | 05-05-2011 |
| 20110055584 | METHOD AND APPARATUS FOR ACCESS CONTROL TO INSTALLATION CONTROL SYSTEMS OF WIND ENERGY INSTALLATIONS - A method for access control to installation control systems of wind energy installations. The method includes receiving a requested user name and a requested password, wherein authorizations and checking information are coded in the requested password. The method further includes decoding the authorizations and the checking information from the requested password, checking the requested user name on the basis of the decoded checking information, checking the decoded authorizations if the check of the requested user name on the basis of the decoded checking information has a positive result, and allowing access to an installation control system of a wind energy installation when the decoded authorizations are sufficient. A wind energy installation for implementing the method includes an installation control system and a decoding unit. | 03-03-2011 |
| 20110047300 | METHOD AND SYSTEM FOR AUTOMATIC CONFIGURATION PARAMETER MONITORING FOR WIND ENERGY INSTALLATIONS - A method for automatic configuration parameter monitoring for wind energy installations. The method includes generating a nominal configuration parameter set for a wind energy installation, storing the nominal configuration parameter set in a database, automatically detecting an actual configuration parameter set for the wind energy installation, automatically comparing the nominal configuration parameter set with the actual configuration parameter set, and outputting a warning message in the event of discrepancies between the actual configuration parameter set and the nominal configuration parameter set. A system for implementing the method can include a wind energy installation with a communication unit, a server, and a database. | 02-24-2011 |
| 20110041438 | CONSTRUCTION OF A WIND ENERGY PLANT - A wind power plant with a tubular tower, wherein the tubular tower will be or is arranged above a foundation body, preferably arranged in the ground, and the tubular tower has a tower foot flange, which is or will be connected with the foundation body by means of a flange connection, on its bottom side. The wind power plant is characterized in that at least one injection hose is or will be arranged in the area of the top side of the foundation body facing the tower foot flange, in particular on the top side of the foundation body, or at least one injection hose is or will be arranged on the top side between the tower foot flange and the top side of the foundation body facing the tower foot flange or a connection part is provided in the foundation Body. | 02-24-2011 |
| 20110037263 | BLADE ANGLE ADJUSTMENT RATE LIMIT ADJUSTMENT - A method for the operation of a wind power plant ( | 02-17-2011 |
| 20110037262 | WIND 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 |
| 20110031762 | WIND ENERGY SYSTEM HAVING A CONNECTION PROTECTION DEVICE - A wind energy installation includes a rotor, a generator driven by the rotor, and a converter for generating electrical power which is output into a power supply system via a transformer. The installation also includes an open-loop control system having an open-loop converter control unit. The open-loop control system supplies an actuating signal for a reactive component to the converter. The installation further includes a voltage measurement device arranged on the transformer. The voltage signal of the voltage measurement device is applied to an input of a state-dependent setpoint value shifter, whose output signal is applied to a limitation module for the reactive component acting on the converter. With this configuration, the installation can be better protected and the transformer can be better utilized. | 02-10-2011 |
| 20110008168 | GEAR BOX OF A WIND POWER PLANT - A gear box ( | 01-13-2011 |
| 20100332042 | WIND FARM AND METHOD FOR CONTROLLING A WIND FARM - A wind farm includes a plurality of wind energy installations, a transfer point at which electrical energy produced by the wind energy installations is transferred to a public electricity grid system and for which nominal values are preset, and a measurement sensor configured to measure electrical actual values at the transfer point. The wind farm also includes a master regulator associated with an upper control level and configured to use upper nominal values and upper actual values at the upper control level to determine a preset for a lower control level, and a plurality of submaster regulators associated with the lower control level and configured to use the preset as a lower nominal value and, on the basis of the lower nominal value and a lower actual value, determine presets for the wind energy installations. A high level of control accuracy can thus be achieved even in large wind farms. | 12-30-2010 |
| 20100327584 | WIND 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 |
| 20100320762 | WIND 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 |
| 20100314874 | SYSTEM 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 |
| 20100289266 | METHOD 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 (RB | 11-18-2010 |
| 20100283247 | CONTROL 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 |
| 20100276930 | WIND 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 |
| 20100253079 | WIND 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 |
| 20100207463 | METHOD FOR OPERATING A WIND POWER PLANT WITH EXCESS VOLTAGE IN THE GRID - A method is provided for operating a wind power plant ( | 08-19-2010 |
| 20100183440 | METHOD FOR THE OPERATION OF A WIND POWER PLANT - The invention concerns a method for operating a wind power plant (WEA), preferably before or during the performance of maintenance work on the wind power plant (WEA), wherein —at least one physical condition of the surroundings outside the wind power plant (WEA) induced by wind movement outside the wind power plant (WEA) is detected as an external physical condition, and/or at least one physical condition of a component of the wind power plant (WEA) influenced by wind movement outside the wind power plant (WEA) is detected as an internal physical condition; —the at least one external physical condition and/or at least one internal physical condition are evaluated; —the at least one external physical condition is compared with a predetermined reference value for the external physical condition, and/or the at least one internal physical condition is compared with a predetermined reference value for the internal physical condition; —depending on the comparison at least one warning message is generated, in particular a maintenance warning message. | 07-22-2010 |
| 20100181769 | MOTOR LOAD REDUCTION IN A WIND POWER PLANT - A wind power plant is characterized in that a measurement device ( | 07-22-2010 |
| 20100176770 | Method and electricity generating installation for stabilizing an electricity distribution network - An electricity generating installation is connected to an electricity distribution network and feeds electrical power into the network via a converter. After detecting a network fault, a stabilization regulator in the installation is activated. The stabilization regulator regulates the voltage of the electrical power as a function of a fed-back voltage signal and has a step-function response that rises over time. After a predetermined time period has elapsed since the activation of the stabilization regulator, the reactive current feed is increased beyond a limit which is provided for normal operation if the network has not stabilized. Accordingly, a converter-fed electricity generating installation, such as a wind energy installation, can help stabilize an electricity distribution network after a network fault. | 07-15-2010 |
| 20100171317 | CONNECTION ASSEMBLY FOR COMPONENTS OF A WIND TURBINE - A connection of components ( | 07-08-2010 |
| 20100154351 | TOWER OF A WIND POWER PLANT - The invention concerns a method for erecting a tower of a wind power plant made of at least three tube-shaped tower segments. For this a tower segment is connected at its ends with another tower segment in each case,
| 06-24-2010 |
| 20100148506 | ROTOR 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 |
| 20100091417 | Overvoltage protective device for wind energy installations - An overvoltage protective device for wind energy installations is designed for connection to a connecting line having at least one inductance between a wind energy installation and a grid system. The overvoltage protective device has a controller which operates a limiting unit as a function of an overvoltage at the wind energy installation. The limiting unit comprises a spur line having an induction module and a power tapping module which is provided with a switching unit. This yields a second power strand which can accept a considerable reactive current if necessary, thus increasing the voltage drop across the inductance, as a result of which the voltage acting on the wind energy installation is reduced. | 04-15-2010 |
| 20100052322 | WIND 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 |
| 20100013227 | METHOD FOR OPERATING A WIND ENERGY INSTALLATION - The invention relates to a method for the operation of a wind power plant ( | 01-21-2010 |
| 20100001527 | CONTROLLABLE 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 |
| 20090322086 | DRIVE 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 |
| 20090322079 | METHOD FOR THE OPERATION AND USE OF A CONVERTER - A method for the operation of a converter of a power-generating generator system that can be connected to an electrical AC network, and the use of the converter is provided. | 12-31-2009 |
| 20090317256 | ROTOR HUB OF A WIND ENERGY PLANT - A rotor hub ( | 12-24-2009 |
| 20090295161 | METHOD 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 |
| 20090289804 | SIGNAL DEVICE FOR OFFSHORE WIND FARM - An offshore wind farm can include at least two wind energy installations for generating electrical power from wind, at least two acoustic warning devices, and a visibility measuring device for detecting visibility. After detection of a visibility below a visibility limit value, an activation signal can be applied to the at least two acoustic warning devices. One or more synchronization modules can be provided which determine the points in time of the acoustic signals to be emitted by at least one of the acoustic warning devices in relation to the acoustic signals of the other acoustic warning devices. Accordingly, this facilitates the navigation along an offshore wind farm and enables safe circumnavigation. Also, the impression of a contiguous area can be conveyed to the ships by the synchronized emission of the warning signals. | 11-26-2009 |
| 20090278359 | POSITIONING OF A ROTOR OF A WIND POWER PLANT - The invention relates to a wind power plant (W) with a rotor, which is in operative connection with a gearbox ( | 11-12-2009 |
| 20090274559 | ROTOR BLADE OF A WIND ENERGY UNIT - The invention relates to a rotor blade ( | 11-05-2009 |
| 20090263250 | ROTOR BLADE ATTACHMENT - The invention relates to a rotor blade attachment ( | 10-22-2009 |
| 20090263246 | CALIBRATION METHOD - The invention relates to a method for the calibration of at least one sensor ( | 10-22-2009 |
| 20090261588 | METHOD 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 |
| 20090243296 | WIND ENERGY INSTALLATION WITH AN AUTONOMOUS ENERGY SUPPLY FOR A BLADE ADJUSTMENT DEVICE - Wind energy installation with a generator ( | 10-01-2009 |
| 20090224543 | Method 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 |
| 20090210200 | METHOD FOR PROVIDING OPERATING DATA OF A WIND FARM - A method for providing operating data of a wind farm comprising a plurality of wind farm components. The operating data of the wind farm components are recorded and are stored in the relevant wind farm component. The operating data are sent to a plurality of receivers using a push method. The method simplifies the management of the operating data and requires only minimal transmission capacity in the data line of the wind farm component. | 08-20-2009 |
| 20090159549 | ERECTING A WIND POWERPLANT - A method for handling a wind powerplant's rotor hub ( | 06-25-2009 |
| 20090115191 | METHOD 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 |
| 20090102196 | METHOD 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 |
| 20090021014 | Wind 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 |
| 20090001726 | Energy 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 |
| 20080303281 | ROTATIONAL SPEED DETERMINATION - The invention relates to a method for the operation of a wind power plant ( | 12-11-2008 |
| 20080290664 | Wind Power Plant Comprising Individual Pitch Devices - Provided herein is a wind energy installation including a generator for production of electrical energy, a rotor which drives the generator and has variable pitch rotor blades and a central control device, and individual pitch devices provided individually for the rotor blades. The individual pitch devices may include an adjustment drive, a communication link to the central control device and a regulator, the rotor blades being adjustable in order to slow down the wind energy installation to a shut-down position. The individual pitch devices may also include a disturbance situation detector which is designed to identify abnormal operating states and to move the rotor blades to a shut-down position. Also provided herein is the method of operating such a wind energy installation. | 11-27-2008 |
| 20080265577 | Power 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 |
| 20080240922 | CONNECTION OF COMPONENTS OF A WIND TURBINE - The invention relates to a connection between components of a wind turbine. More specifically, the present invention relates to components for a wind turbine having a diameter of more than 0.5 m, preferably more than 1.0 m, and more preferably more than 1.5 m. The wind turbine includes two components that are connected together, whereby each component has a contact surface. The surface of the contact surface of a first component is softer than the surface of the contact surface of a second component. Further, the surface of the contact surface of the second component is annealed. | 10-02-2008 |
