| VESTAS WIND SYSTEMS A/S Patent applications |
| Patent application number | Title | Published |
|---|
| 20120134828 | WIND TURBINE WITH HYDRAULIC BLADE PITCH SYSTEM - A wind turbine is disclosed having a rotor with at least two blades and a blade pitch system for controlling the pitch angle of the blades. The blade pitch system comprises for each of the blades, a hydraulic blade pitch drive and at least two valves mutually connected in parallel for controlling a flow of liquid to the hydraulic blade pitch drive for that blade. The valves each comprises an arrangement for providing a variable flow of liquid. | 05-31-2012 |
| 20120134816 | PILOT CIRCUITRY FOR CONTROLLING THE EMERGENCY FEATHERING OF A WIND TURBINE - A pilot circuitry is disclosed for controlling the activation of an emergency feathering system of a wind turbine by means of a pilot pressure, wherein the pilot circuitry comprises at least two parallel control circuits for providing a pilot pressure. Additionally, a selector may provided for selectively preventing a control circuit from providing the pilot pressure to the emergency feathering system in case of malfunction of the control circuit. | 05-31-2012 |
| 20120134806 | WIND TURBINE AND A METHOD FOR PITCHING A BLADE OF A WIND TURBINE - A wind turbine includes at least one wind turbine blade assembly. The blade assembly includes a blade and a pitch bearing arranged between the blade and a hub of the wind turbine, the blade assembly further including two or more hydraulic pitch cylinders for pitching the blade in relation to the hub. The two or more hydraulic pitch cylinders are arranged to expand in the same angular direction around the rotational axis of the pitch bearing. A method for pitching a blade of a wind turbine includes connecting a first end of the hydraulic pitch cylinders directly or indirectly to the hub; connecting a second end of the hydraulic pitch cylinders directly or indirectly to the blade; and expanding or contracting the hydraulic pitch cylinders in the same angular direction in relation to the rotational axis of the pitch bearing. | 05-31-2012 |
| 20120134802 | WIND TURBINE BLADE CONTROL - A wind turbine variable is controlled by detecting air flow conditions in front of the leading edge of the blade. One or more Laser Doppler Anemometers are mounted on or incorporated into the blade to determine air flow velocity in the region in front of the leading edge of the blade. The measured flow conditions may be used to control the position of a control surface such as a trailing edge flap or the rotor speed. The LDAs may comprise lasers of different frequencies to enable more than one component of flow velocity to be measured. | 05-31-2012 |
| 20120133138 | PLANT 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 |
| 20120131782 | METHOD FOR MAKING A MOULD FOR A WIND TURBINE ROTOR BLADE - A method for making a mould for a part of a wind turbine rotor blade to be moulded in the mould, the method comprises determining whether a geometrical property of the mould is within an acceptable limit; and if the determined geometrical property is not within the acceptable limit adjusting the mould so as to bring the geometrical property to be within the acceptable limit. The mould needs not be manufactured to the final and narrow tolerances required for making wind turbine generator rotor blades, but adjustment to desired geometrical properties can be carried out according to determined geometrical properties and desired tolerances. This ensures that rotor blades can be produced with desired geometrical and aerodynamic properties and with narrow tolerances. Also, the mould can be made lighter whereby it will be less costly and easier to move and to manipulate. | 05-31-2012 |
| 20120128488 | ROTOR-SECTOR BASED CONTROL OF WIND TURBINES - Embodiments of the invention generally relate to controlling a wind turbine comprising blades attached to a rotor hub for rotation in a rotor plane and a control system for individually pitching the blades relative to the hub. The rotor planes divided into a plurality of predefined section, wherein each section has an associated pitch reference value. A light detection and ranging device may be used to determine expected properties of wind in each respective section of the rotor plane so that the pitch reference value may be adjusted accordingly. | 05-24-2012 |
| 20120117898 | TOWER PART FOR A WIND TURBINE, AN APERTURE COVER SYSTEM, A METHOD FOR MANUFACTURING A TOWER PART AND USES HEREOF - The invention relates to a tower part for a wind turbine including at least one wall segment and at least one aperture segment including at least one aperture. The wall segment and the aperture segment are connected and the aperture segment is of a substantially uniform thickness and is thicker than the thickness of the wall segment. The invention further related to an aperture cover system for covering at least one aperture in a tower part for a wind turbine including cover plates and attachments for attaching the system to the tower part, wherein the attachments do not affect the fatigue limit of the tower part. Finally, the invention relates to a method for manufacturing a wind turbine tower part and uses thereof. | 05-17-2012 |
| 20120116598 | OPTICAL TRANSMISSION STRAIN SENSOR FOR WIND TURBINES - Broad band optical strain sensing systems for a wind turbine. The strain sensing system includes an optical fiber with an input at one end and an output at the opposite end. The optical fibre is provided with Bragg sensors between the input and the output. By injecting light at the input of the fiber, measuring the spectral intensity distribution of at the output of the fiber and determining spectral locations of intensity notches in the spectral intensity distribution, it is possible to determine strain values at the locations of the Bragg sensors from the transmitted light. | 05-10-2012 |
| 20120114497 | METHOD OF MANUFACTURING A WIND TURBINE BLADE COMPRISING TWO MEMBERS BEING JOINED BY ADHESION - The present invention relates to a method of manufacturing a wind turbine blade | 05-10-2012 |
| 20120112460 | PROBING 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 |
| 20120107553 | IMPROVEMENTS IN OR RELATING TO COMPOSITE STRUCTURES - A split core for a composite structure is described. The split core includes a first core layer, a second core layer, and a functional interlayer disposed between the first and second core layers. The first core layer separates the functional interlayer from a functional layer of the composite structure and/or from an outer surface of the composite structure. The thickness of the first core layer is substantially uniform across the composite structure and the distance between the functional interlayer and the functional layer and/or the outer surface of the composite structure is substantially constant across the composite structure. | 05-03-2012 |
| 20120107117 | WIND TURBINE AND A BLADE FOR A WIND TURBINE - A wind turbine with a rotor mounted on a hub section, wherein the rotor comprises a plurality of blades, at least one of which comprises a main blade section, which is optionally pitchable, and an auxiliary blade section mounted to the hub section. The auxiliary blade section is arranged in the area of a leading edge or of a trailing edge of the main blade, so that each blade is thereby provided with a leading edge slat or a trailing edge flap formed by the auxiliary blade section to increase the planform area of the blade and increase aerodynamic lift. A control method for a wind turbine controls a main blade section and an auxiliary blade section to provide different angles of attack to reduce undesired loads at sudden extreme changes of wind speed, e.g. during idling of the wind turbine. In a separate aspect, the invention provides a wind turbine having a blade with a non-pitchable leading edge slat, which extends at most 40% of the radius of the rotor in a longitudinal direction of the blade. | 05-03-2012 |
| 20120093658 | COMPOSITE STRUCTURES - A core for a composite structure is described. The core has first and second core layers, and an interlayer region between the first and second core layers. At least one of the first and second core layers has hinge portions that facilitate draping of the core without interrupting the interlayer region. The interlayer region may include functionality such as a radar reflecting layer and/or optical fibres. Alternatively, the core may be a bonded core in which the interlayer region includes an adhesive layer for bonding the first and second core layers together. | 04-19-2012 |
| 20120093651 | WIND TURBINE BLADE HAVING A HINGED CONNECTION APPARATUS PROVIDING ELECTRICAL PROTECTION - A hinged connection apparatus is described for securing a first wind turbine component to a second. The first wind turbine component may be a wind turbine blade and the second wind turbine component may be a control surface such as an aileron. The first or second wind turbine component comprises at least one hinge housing ( | 04-19-2012 |
| 20120093647 | METHOD AND SYSTEM FOR REGISTERING EVENTS IN WIND TURBINES OF A WIND POWER SYSTEM - Methods of registering events in a wind power system comprising at least two data processors. The data processors of said wind power system are mutually time synchronized. Events are registered in said at least two data processors. The timing of said events registered in different of said at least two data processors is established according to said time synchronization. Events may be registered and preferably analyzed according to a common timing. The event analysis makes it possible to establish an analysis where events of different wind turbines are basically interrelated and where information regarding such interrelation may be important or crucial for establishment of control or fault detection based on correctly timed events from different wind turbines. | 04-19-2012 |
| 20120093450 | BEARING FOR A WIND TURBINE AND A CANISTER FOR A BEARING - The invention provides a bearing for attaching a wind turbine blade to a wind turbine hub, the bearing comprising a stationary ring, a movable ring which can rotate relative to the stationary ring, a grease lubrication structure, and a canister for collecting grease. The grease lubrication structure forms an outlet for releasing grease from a space between the stationary ring and the movable ring and the canister comprises an inner space with at least one inlet in releasable fluid communication with the outlet. The outlet and the inlet comprise cooperating coupling elements adapted for releasable snap-connection of the outlet to the inlet. Due to the snap-connection, the canister is easily removed and replaced in connection with maintenance of the wind turbine even though the space in the hub is typically very limited. | 04-19-2012 |
| 20120091274 | WIND TURBINE GENERATOR INSTALLATION BY AIRSHIP - The invention relates to a method for handling at least one wind turbine generator component | 04-19-2012 |
| 20120086215 | WIND TURBINE NACELLE WITH COOLER TOP - The present invention relates to a wind turbine nacelle having a top face with a longitudinal extension in a wind direction, comprising a cooling device extending from the top face of the nacelle and a cover having at least one inner face. The cooling device is enclosed by the top face of the nacelle and the inner face of the cover. | 04-12-2012 |
| 20120085864 | WIND TURBINE GENERATOR INSTALLATION BY AIRSHIP - The invention relates to a method for positioning an airship | 04-12-2012 |
| 20120070304 | ROTOR LOCK FOR A WIND TURBINE - A locking arrangement for locking a hub ( | 03-22-2012 |
| 20120070284 | HINGE APPARATUS FOR CONNECTING FIRST AND SECOND WIND TURBINE BLADE COMPONENTS COMPRISING A ROTARY ACTUATOR - A hinged connection apparatus is described for securing a first wind turbine blade component to a second. The first wind turbine component may be a wind turbine blade body ( | 03-22-2012 |
| 20120070283 | HINGED CONNECTION APPARATUS FOR SECURING A FIRST WIND TURBINE COMPONENT TO A SECOND - A hinged connection apparatus is described for securing a first wind turbine component to a second. The first wind turbine component may be a wind turbine blade ( | 03-22-2012 |
| 20120070280 | CONTROL SYSTEM FOR A WIND TURBINE AND METHOD OF OPERATING A WIND TURBINE BASED ON MONITORING A BEARING - A method of operating a wind turbine having a bearing assembly, a shaft received therein, and at least one sub-system capable of altering a dynamic state of the wind turbine includes monitoring at least one parameter indicative of a load on the shaft; comparing the at least one parameter to a threshold criteria; and when the at least one parameter meets the threshold criteria, altering the dynamic state of the wind turbine to reduce the load on the shaft; and/or altering the state of the bearing assembly to better accommodate the load on the shaft. A control system for the wind turbine includes a controller operatively coupled to the bearing assembly and the at least one sub-system, and at least one sensor for monitoring at least one parameter indicative of a load on the shaft. The controller signals the sub-system or the bearing assembly when the threshold criteria is met. | 03-22-2012 |
| 20120068472 | ELECTRICAL MACHINES, WIND TURBINES, AND METHODS FOR OPERATING AN ELECTRICAL MACHINE - Electrical machines, wind turbines, and methods of operating an electrical machine. The electrical machine includes first and second rotatable members that are configured to convert mechanical energy received from the wind turbine rotor into electrical energy. The first rotatable member is coupled with the wind turbine rotor and the second rotatable member is coupled by a gear train with the wind turbine rotor. The gear train, which is driven by rotation of the wind turbine rotor, rotates the second rotatable member relative to the first rotatable member in a direction counter to a direction of rotation of the first rotatable member. The electrical machine may be a generator of the wind turbine. | 03-22-2012 |
| 20120068469 | WIND TURBINE ROTOR BLADE - A wind turbine blade extending in a longitudinal direction from a root end to a tip end and defining an aerodynamic airfoil cross-section between a leading edge and a trailing edge in a chordwise direction transverse to the longitudinal direction, the aerodynamic airfoil cross-section having an effective camber in the chordwise direction; the wind turbine blade comprising: blade body; first device for modifying the aerodynamic surface or shape of the blade, the position and/or movement of the first device relative to the blade body being controlled by a first actuation mechanism; second device for modifying the effective camber of the airfoil cross section; herein, in use, the first device modifies the aerodynamic surface or shape of the blade at a frequency up to a first maximum frequency and the second device modifies the effective camber of the airfoil cross section at a frequency up to a second maximum frequency, the second maximum frequency being higher than the first maximum frequency. | 03-22-2012 |
| 20120068460 | CONVERTIBLE 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 |
| 20120063890 | WIND TURBINE NACELLE WITH COOLER TOP - The present invention relates to a wind turbine nacelle having a first face with a longitudinal extension in a wind direction, comprising a cooling device having a cooling area and extending from the first face of the nacelle, and a cover having at least one inner face, the cooling device being enclosed by the first face of the nacelle and the inner face of the cover. A first distance between at least one of the faces and the cooling area is at least 30 mm. | 03-15-2012 |
| 20120061047 | WIND TURBINE NACELLE WITH COOLER TOP - The present invention relates to a wind turbine nacelle having a top face with a longitudinal extension in a wind direction. The nacelle comprises a cooling device having a cooling area and extending from the first face of the nacelle, and a cover having at least one inner face and at least a front edge facing the wind direction. The cooling device is enclosed by the first face of the nacelle and the inner face of the cover and is arranged in a front distance of at least 440 mm from the front edge of the cover. | 03-15-2012 |
| 20120060351 | SHAFT CONNECTION USING A BAND - The present invention relates to a connection of two shafts, for example a driving shaft and a driven shaft in a wind turbine. In particular, the invention relates to a connection making use of a band to lock the two shafts together. The two shafts are inter-connectable by connecting an interconnection part of the first shaft and an interconnection part of the second shaft. The band is positioned and wound around an outer surface enclosing the interconnection parts of the shafts. The shafts are locked together by providing pressure to the interconnection parts from the windings of the band. | 03-15-2012 |
| 20120057978 | WIND TURBINE WITH LOW ELECTROMAGNETIC RADIATION - The invention provides a wind turbine with a lightning arrester system including one or more lightning receptors (R) mounted on one or more rotor blades. A down conductor electrically connects one or more lightning receptors (R) to electrical ground via a sliding contact arrangement (SC), and an electromagnetic radiation (EM) reduction device encircles a portion of the down conductor so as to reduce EM radiation from the down conductor due to static electric discharges caused by imperfect electric contact in the sliding contact arrangement (SC). Known types of EM radiation reduction devices in the form of commercially available common mode choke coils, cylindrically shaped nano-crystalline solid body types, or the like, can be used. A plurality of different types with different EM radiation reduction properties can be used in combination. To obtain more effective EM radiation reduction, a plurality of EM radiation reduction devices can be used, e.g. positioned at several portions of the down conductor, especially close to sliding contact arrangements (SC). | 03-08-2012 |
| 20120045343 | ROTOR BLADE FOR A WIND TURBINE AND A METHOD FOR MAKING THE SAME - The invention relates to a rotor blade for a wind turbine. The rotor blade comprises a shell and a spar forming a longitudinally extending hollow structure within the shell and comprising: a leading web, a trailing web, and one or more additional webs. Each additional web defines an intermediate portion between a hub end and a tip end. The intermediate portion of each additional web is spaced apart from the leading and trailing webs and at least one of the tip and the hub ends is connected to or integral with the leading or the trailing web. The invention further relates to a wind turbine comprising the rotor blade, and a method for manufacturing the rotor blade. | 02-23-2012 |
| 20120045321 | WIND TURBINE NACELLE - The present invention relates to a nacelle for a wind turbine, the nacelle having a first height in its installed position and a second height in its transported position, the first height being higher than the second height, comprising a bottom part having a bottom face and two opposite side faces defining a space and a width of the bottom part and a top part. In the transported position, the top part extends inside the width or outside the width in order to cover at least part of the space. The invention also relates to a transportation kit and a transport method. | 02-23-2012 |
| 20120039720 | METHOD OF MANUFACTURING A WIND TURBINE BLADE BY EMBEDDING A LAYER OF PRE-CURED FIBRE REINFORCED RESIN - The present invention relates to a method of manufacturing a wind turbine blade or a part of a wind turbine blade. The method comprises arranging at least one layer of uncured resin pre-impregnated fibres, called prepregs, and at least one layer of cured fibre reinforced resin in an at least partly overlaying relationship, and curing the resin of the at least one layer comprising uncured resin. The at least one layer of cured fibre reinforced resin is assembled with at least one layer of uncured resin-preimpregnated fibres prior to being placed on a moulding surface. The method may e.g. be used to manufacture a wind turbine blade shell member or a wind turbine blade spar member. The invention further relates to a wind turbine blade shell member or a wind turbine blade spar member manufactured by such a method. The invention further relates to a pre-form for use in a wind turbine blade, the pre-form comprising at least one layer of uncured resin pre-impregnated fibres and at least one layer of cured fibre reinforced resin in an at least partly overlaying relationship. | 02-16-2012 |
| 20120034096 | INCORPORATION OF FUNCTIONAL CLOTH INTO PREPREG COMPOSITES - Incorporation of functional cloth into prepreg composites A combined prepreg material ( | 02-09-2012 |
| 20120029843 | METHOD, SYSTEM, AND COMPUTER PROGRAM PRODUCT FOR SENSOR DATA COLLECTION IN A WIND TURBINE - Method, system, and computer program product for collecting sensor readings from a component of a wind turbine. The system includes a data collection system coupled in communication with a sensor. The data collection unit includes a processor configured to direct the sensor readings from the sensor to a buffer for temporary storage and to identify a triggering event by comparing the sensor readings received from the sensor with a reference value. In response to the identification of the triggering event, the sensor readings are transferred from the buffer to the mass storage device and stored in a non-volatile form by the mass storage device. | 02-02-2012 |
| 20120025537 | WIND TURBINE NACELLE WITH COOLER TOP - The present invention relates to a wind turbine nacelle comprising a front end facing a wind flow and a rear end arranged downwind from the front end; a first face with a longitudinal extension between the front end and the rear end of the nacelle, the longitudinal extension of the nacelle having a total length; a velocity boundary layer, which is created by the wind flow along the first face from the front end to the rear end, the velocity boundary layer increasing in thickness along the first face and the thickness being lowest at the front end; and a free flow cooling device extending from the first face of the nacelle, the free flow cooling device comprising a cooling area. Furthermore, the cooling area is arranged in relation to the thickness of the velocity boundary layer. | 02-02-2012 |
| 20120022714 | WIND TURBINE WITH A CONTROLLER CONFIGURED TO MANAGE RESONANT EFFECTS - A method and apparatus of operating a controller usable for operating a wind turbine is provided. The wind turbine includes a voltage converter being connectable to a power grid via a filter arrangement. The method includes determining a line voltage and adding the determined line voltage to the output of the voltage converter with a time delay. The time delay is adjusted such that resonant effects occurring at the filter arrangement are decreased. | 01-26-2012 |
| 20120020798 | FAIRING FOR WIND TURBINE BLADE - The invention relates to a fairing adapted to be mounted on a wind turbine blade ( | 01-26-2012 |
| 20120009070 | METHOD OF MANUFACTURING A WIND TURBINE BLADE SHELL MEMBER - A method for preparing a wind turbine blade shell member comprising a plurality of elements of cured fibre-reinforced sheet material is provided. A plurality of elements of cured fibre-reinforced sheet material is provided in a mould, a resin is introduced between the elements of cured fibre-reinforced sheet material and the elements are bonded to adjacent elements by curing the resin. The method is particularly suitable for preparing wind turbine blade shell members due to the complex three-dimensional shape of the airfoils, which may be resembled by the relatively flexible cured fibre-reinforced sheet material. | 01-12-2012 |
| 20120007444 | HIGH VOLTAGE SWITCHGEAR POWER SUPPLY ARRANGEMENT FOR A WIND TURBINE FACILITY - The present invention relates to a wind turbine facility power supplying arrangement for supplying electrical power to at least a switchgear being able to isolate the wind turbine facility from an electrical network, the wind turbine facility power supplying arrangement comprising a first electrical power supply path able to be provide electrical power to the switchgear and a first power switch able to break said first electrical supply path and able to be controlled for opening and closing. The wind turbine facility power supplying arrangement contains at least another parallel electrical power supply path able to provide electrical power to the switchgear, said parallel electrical supply path been breakable with at least another respective parallel power switch, said parallel power switch being controllable for opening and closing. | 01-12-2012 |
| 20120004781 | SYSTEM, METHOD, AND COMPUTER PROGRAM PRODUCT FOR UTILIZING A WIND PARK AS A VARIABLE POWER SYSTEM STABILIZER - System, method, and computer program product for dampening oscillations of the electrical power on a power grid. The system includes a wind park with multiple wind turbines. Each wind turbine includes a rotor, a generator operatively coupled with the rotor for generating electrical power, and an inverter coupling the generator with the power grid to output the electrical power to the power grid. A controller is configured to generate a first control signal to cause the inverter of the first wind turbine to modulate the electrical power output by the first wind turbine for dampening oscillations of one frequency in electrical power on the power grid and to generate a second control signal to cause the inverter of the second wind turbine to modulate the electrical power output by the second wind turbine for dampening oscillations of a different frequency in the electrical power on the power grid. | 01-05-2012 |
| 20120003089 | CLEANING AND INSPECTING APPARATUS FOR WIND TURBINE AND RELATED METHODS - A maintenance apparatus is provided for use with a wind turbine that has a tower, a hub supported by the tower, and a plurality of blades extending outwardly from the hub. The maintenance apparatus has a mounting element that is configured to be secured to the tower and to be selectively movable along the length thereof. A robotic arm is coupled to the mounting element, and a blade-engaging device is coupled to the robotic arm and is configured to engage one of the blades to effect a maintenance task thereon. | 01-05-2012 |
| 20110309629 | WIND TURBINE HAVING POWER ELECTRONICS IN THE NACELLE - A wind turbine comprising a nacelle ( | 12-22-2011 |
| 20110301769 | CONTROL OF A WIND POWER PLANT - Methods for controlling a wind power plant that includes a plurality of wind turbines being operatively connected to a plant collector grid a power plant controller, a wind power plant, and a computer program product. The method may include generating an actual power reference signal in response to a determination of the power production of the wind power plant and comparing a desired power reference signal with the actual power reference signal. The method may include either applying a first filter characteristic as part of a generation of a wind turbine power reference if the desired power reference signal exceeds the actual power reference signal, or applying a second filter characteristic as part of the generation of the wind turbine power reference if the actual power reference signal exceeds the desired power reference signal. The first filter characteristic is different from the second filter characteristic. | 12-08-2011 |
| 20110299997 | HANDLING A WIND TURBINE NACELLE - In order e.g. to increase safety, flexibility and simplicity when handling a wind turbine nacelle | 12-08-2011 |
| 20110293433 | ENHANCING STIFFNESS OF WIND TURBINE BLADES - Edgewise stiffness of a wind turbine blade is enhanced by arranging a tension element between anchor points at the ends of a load bearing member in the turbine blade such as a spar or a beam. The tension element is spaced away from the load bearing member on the trailing edge side of the load bearing member by struts and acts as a suspension cable. Several tension elements may be used and a similar tension element may be arranged on the leading edge side of the load bearing member. | 12-01-2011 |
| 20110293432 | SECTIONAL WIND TURBINE BLADE - Wind turbine blade comprising two or more blade sections each of which defines a non-joint zone and, at one or each of its ends, a joint zone. The blade sections are connected in pairs such that the joint zones of each pair are connected at a joint, whereby the joint is positioned between two non-joint zones. At least one of the joints have an increased thickness and a wider chord relative to the thickness and the chord of the two non-joint zone between which the joint is positioned so as to increase the second moment of inertia in the area of the joint. | 12-01-2011 |
| 20110293420 | WIND TURBINE BLADE WITH DEVICE FOR CHANGING THE AERODYNAMIC SURFACE OR SHAPE - The invention relates to a wind turbine blade comprising a device for modifying the aerodynamic surface or shape of the blade in an area of the trailing edge, and activation mechanisms for controlling the position and/or movement of the device. The device is at least partly divided into a number of sections by interstices or connecting portions having a higher elasticity. Hereby the overall longitudinal bending flexibility of the device is increased which in turn increases the operability of the aerodynamic device and reduces the wear of the system. The interstices may be open, comprise a filler material, or optionally be covered by an elastic film. | 12-01-2011 |
| 20110293357 | SHRINK DISK CONNECTION FOR A WIND TURBINE - In order e.g. to provide a connection for connecting shafts in a wind turbine which is able to withstand a torque of a modern wind turbine, while still being relatively inexpensive, simple and effective to use, there is disclosed a connection including a first shaft and a second shaft which are inter-connectable by connecting an interconnection part of the first shaft and an interconnection part of the second shaft, and a shrinkable disk positioned and adapted so as to lock the first shaft to the second shaft by providing pressure to the interconnection parts of the first and second shaft when the interconnection parts are interconnected, and where the interconnection part of each of the first and second shafts comprises a plurality of friction surfaces transferring moment between the first and second shafts by friction. | 12-01-2011 |
| 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 |
| 20110278852 | WIND TURBINE NACELLE - According to the present invention is provided a wind turbine nacelle comprising wind turbine components. The nacelle also comprises a load carrying structure including a base member ( | 11-17-2011 |
| 20110267598 | OPTICAL SENSOR SYSTEM AND DETECTING METHOD FOR AN ENCLOSED SEMICONDUCTOR DEVICE MODULE - A sensor system and method for a power electronics module is discussed. The system comprises a optical fibre | 11-03-2011 |
| 20110262283 | METHOD OF MANUFACTURING A SPAR FOR A WIND TURBINE FROM ELEMENTS HAVING END PORTIONS EXTENDING TRANSVERSELY TO AN INTERMEDIATE PORTION - The invention provides a method of manufacturing a spar ( | 10-27-2011 |
| 20110260739 | Method and System for Testing Wind Turbine Plants - The present invention relates to a method and a system for on-site and full-scale testing of wind turbine plants. In particular, the present invention relates to a method and a system applying resonance circuits tuned with the fundamental frequency, or harmonics thereof, of a power supply grid connected to a wind turbine plant to be tested. The wind turbine plant to be tested may remain connected to the power supply grid during on-site and full-scale testing. | 10-27-2011 |
| 20110260465 | WIND TURBINE - According to the present invention is provided a wind turbine connected to a utility grid, said wind turbine comprising a nacelle, at least one transformer for feeding generated power to the utility grid, and a flexible suspension arrangement connected to a load carrying structure of the nacelle and suspending said transformer above a floor level of the nacelle. | 10-27-2011 |
| 20110260428 | TRANSPORT SYSTEM - The present invention relates to a transport system for transporting a large element having a longitudinal extension, such as a wind turbine nacelle. The transport system comprises a transport means having a first and a second transport unit, a base structure having a first and a second side and being adapted for supporting and connecting with the large element to be transported, and transport equipment having a first part adapted to be connected to the firstside of the base structure and to the first transport unit and a second part adapted to be connected to the second transport unit. The first part engages with the second part. The invention also relates to a transport method. | 10-27-2011 |
| 20110260362 | WIND TURBINE BLADE MANUFACTURING ARRANGEMENT - A wind turbine blade manufacturing arrangement includes a first mould and a second mould connected by a hinge mechanism and presenting respective elongated first and second moulding surfaces. The first mould is adapted to be rotated from an open mould position to a mould closing position by means of the hinge mechanism in a first and a second rotation step. The hinge mechanism is arranged so as to provide for, during at least a part of the first rotation step, the first mould undergoing a combined rotational and a translational movement. | 10-27-2011 |
| 20110254283 | WIND TURBINE - The present invention relates to a wind turbine ( | 10-20-2011 |
| 20110254282 | WIND TURBINE TOWER MONITORING DEVICE - A wind turbine installation monitoring device, for detecting relative movement between two adjacent components of a wind turbine installation is provided. The device comprises a deformable member together with securing means. The securing means is configured to enable the device to be connectable to a wind turbine installation, in use. The deformable member is located across an interface between the adjacent components of a wind turbine installation. Further, detection means are provided and are configured to detect deflection of the deformable member and thereby to detect relative movement between the two components. | 10-20-2011 |
| 20110252738 | WIND TURBINE TOWER SUSPENSION MEANS - A method of mounting elements in a wind turbine tower, whereby the elements are partly or completely attached to the wind turbine tower by means of magnetic attraction forces. Wind turbine suspension units may be attached to the wind turbine tower, preferably completely or partly to the inner wall by means of magnetic attraction forces, which present structure-weakening attachments to the tower or part of the tower. | 10-20-2011 |
| 20110252720 | TOWER, A WIND TURBINE AND A METHOD FOR ARRANGING A PLATFORM INSIDE A TOWER - This invention relates to a tower for a wind turbine, comprising one or more tubular tower sections, having an outer jacket wall and an inward directed flange in its lower and upper ends, and at least one platform arranged inside the tower for facilitating access for maintenance and repairs to the inner of the tower and to the nacelle. The tower also comprises a support structure including at least three elongated tensile load carrying members, which each is attached in its upper end to the upper flange of the tower section and in its lower end to the lower flange of the tower section and which supports one or more platforms that are suspended by the tensile load carrying members while at least one ladder is attached to the platforms. The at least one ladder is stabilized in the horizontal direction by transversal tensile load carrying members extending from the ladder to the tensile load carrying members that are vertically arranged between the upper and lower flanges. The invention also relates to a method for arranging a platform inside a tower. | 10-20-2011 |
| 20110250077 | METHOD FOR INSTALLING A WIND TURBINE, A NACELLE FOR A WIND TURBINE, AND METHOD FOR TRANSPORTING ELEMENTS OF A WIND TURBINE - The invention relates to a method for mounting elements when installing a wind turbine by hoisting to the nacelle, the hub inclusive the main bearing being mounted to the hub with fastening members such as bolts. The invention also relates to a nacelle for a wind turbine, said nacelle provided with a slot for accommodating a main bearing for the hub. The invention also relates to method for transporting elements of a wind turbine, said elements comprising a nacelle, a hub and a main bearing for the hub, and said method comprising assembling with fastening members, at the site of production or at another preliminary site of transportation, the hub and the main bearing. | 10-13-2011 |
| 20110250070 | COMPOSITE GEAR PART FOR A GEAR ARRANGEMENT AND A METHOD OF FORMING A COMPOSITE GEAR PART - A composite gear part ( | 10-13-2011 |
| 20110248565 | METHOD AND APPARATUS FOR DYNAMIC LOAD SHARING - A method for providing dynamic load sharing between a first and a second three phase system is disclosed, wherein the first and second three phase system are connected to a first and second three phase interleaved winding in a generator. The method comprises determining a first q-axis control signal for the first three phase system and a second q-axis control signal for the second three phase system based on a torque and/or power demand for the generator, determining a first d-axis control signal for the first three phase system and a second d-axis control signal for the second three phase system based on a coupling effect between the first and second three phase systems, and adjusting the q-axis control signals and d-axis control signals by including at least one feed forward compensation signal, wherein said at least one feed forward compensation signal is based on a coupling effect between the first and second three phase systems. | 10-13-2011 |
| 20110248500 | CONTROL 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 |
| 20110248499 | WIND 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 |
| 20110246094 | TURBULENCE SENSOR AND BLADE CONDITION SENSOR SYSTEM - The invention comprises a turbulence sensor and sensor system for determining the condition of a wind turbine blade. A turbulence sensor comprises a sensor membrane provided in the surface of a wind turbine blade. A light source and light detector provided in a sensor cavity in the blade illuminate the sensor membrane and detect the light reflected back. The reflected light is mixed with non-reflected light to give an interference pattern indicative of the quality of the airflow, whether it is laminar or turbulent. The turbulence sensor can be used in a sensor system for detecting the accumulation of unwanted matter, such as dirt or ice, on the blade. | 10-06-2011 |
| 20110243738 | WIND TURBINE AND A PITCH BEARING FOR A WIND TURBINE - A wind turbine includes a rotor having a rotational axis and a wind turbine blade connected to a hub through a pitch bearing. The pitch bearing includes an outer ring, a centre ring and an inner ring. The pitch bearing further includes a first rolling element arrangement having at least two rows of rolling elements between the centre ring and one of the inner and outer rings, and a second rolling element arrangement having at least one row of rolling elements between the centre ring and the other of the inner and outer rings. A first row of the at least two rows is arranged at a first distance from the rotational axis, and a second row of the at least two rows is arranged at a second distance from the rotational axis greater than the first distance. A pitch bearing for a wind turbine is also disclosed. | 10-06-2011 |
| 20110241352 | FILTERING OF DEBRIS IN WIND TURBINES - A wind turbine is disclosed, the wind turbine comprising a nacelle including at least one of a debris-generating device, an inlet for air or an outlet for air. Following this invention, the wind turbine further comprises at least one electro-static filter arranged to filter at least one of the debris coming from the debris-generating device, the air coming into the nacelle through the inlet or the air coming out of the nacelle through the outlet. | 10-06-2011 |
| 20110239435 | METHOD OF LIFTING A WIND TURBINE NACELLE - This invention relates to a method of lifting a wind turbine nacelle ( | 10-06-2011 |
| 20110236215 | WIND TURBINE CONTROL SURFACE HINGE - A wind turbine rotor blade has a plurality of trailing edge flaps, the upper surfaces of which are formed as a continuation of the blade skin. The flap deflects about a hinge line in the skin. The hinge line has a plurality of spaced apart slots to prevent the hinge from popping up as the blade deflects in a flapwise direction. The slots are filled with a soft deformable material and the skin around the slots is reinforced during the manufacturing process. | 09-29-2011 |
| 20110236186 | WIND TURBINE AND A PITCH BEARING FOR A WIND TURBINE - A wind turbine includes a rotor having at least one wind turbine blade connected to a rotor hub through at least one blade pitch bearing. The pitch bearing includes at least one outer ring, at least one centre ring and at least one inner ring. The pitch bearing has a first rolling element arrangement between the outer ring and the centre ring, and a second rolling element arrangement between the centre ring and the inner ring, wherein at least one of the first and the second rolling element arrangements includes at least two rows of rolling elements. The at least two rows are at different axial positions in relation to a rotational axis. The play in the first row of roller elements is greater than the play in the second row of roller elements. A pitch bearing for a wind turbine is also disclosed. | 09-29-2011 |
| 20110229336 | METHOD FOR MANUFACTURING A BLADE SPAR FOR A WIND TURBINE - A method for manufacturing a blade spar for a wind turbine blade includes positioning a first spar segment having a first adhering portion; positioning a second spar segment having a second adhering portion at the first spar segment such that the first adhering portion and the second adhering portion are at least partially overlapping, wherein an adhesive is at least partially provided between the overlapping adhering portions; providing at least one fiber layer impregnated with an uncured resin on the outer surfaces of the first and second spar segments at least in the joint region of the first and second spar segments; and simultaneously curing the adhesive and the resin, thereby fixating the first and the second spar segments to each other. | 09-22-2011 |
| 20110229320 | WIND TURBINE BLADE WITH DEVICE FOR MODIFYING THE BLADE AERODYNAMIC SURFACE - The invention further relates to a wind turbine blade comprising at least one device for modifying the aerodynamic surface or shape of the blade. The device is connected to a drive system for operating the device, and the drive system is arranged such that it is drivable by a pressure difference across the drive system. In one embodiment of the invention the wind turbine blade further comprises a number of conduits guiding a flow of air between an outer surface of the wind turbine blade and the drive system. The invention further relates to a method for operating an aerodynamic device for modifying the aerodynamic surface or shape of a wind turbine blade comprising the steps of exploiting a pressure difference across a drive system, inside or around the wind turbine blade in providing operating power for operating said device. | 09-22-2011 |
| 20110227342 | WIND 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 |
| 20110223021 | WIND TURBINE ROTOR BLADE - A wind turbine rotor blade is provided with a mechanism for modifying the camber of the blade. The mechanism acts over a region of the blade surface, the region including a portion of the trailing edge of the blade. Modifying the camber of the blade can increase the lift on the blade and thus the mechanism can be used to optimise blades for operation at high altitude sites where, for example, air density is lower than at sea level. Blades can be produced to the same design and then optimised for operation at differing air densities. The mechanism may be actuated mechanically or hydraulically. In the latter case the mechanism may be operated from the hub of a wind turbine. | 09-15-2011 |
| 20110221215 | METHODS AND APPARATUS FOR HANDLING A TOWER SECTION OF A WIND TURBINE WITH A CRANE - Methods and apparatus for handling and maneuvering a tower section of a wind turbine with a crane. First and second lifting locations on the tower section are respectively connected with first and second sheave members on a beam coupled with a lifting mechanism of the crane. While the tower section is suspended from the beam at the first and second lifting locations, the tower section is rotated about an axis of rotation associated with the second sheave member to change its angular orientation. In response to rotation about the axis of rotation, the second sheave member is configured to move along the beam relative to the first sheave member so that the separation between the first and second sheave members is changed. Alternatively, a center of mass of the tower section may be moved relative to the beam in response to the rotation of the tower section. | 09-15-2011 |
| 20110217167 | CONTROL SYSTEM IN WIND TURBINE BLADES - The invention relates to a wind turbine blade with devices for modifying the aerodynamic surface or shape of the blade. The position and movement of these devices are controlled by a pneumatic actuator powered by pressure from a pressure chamber connected to the actuator via a valve system controlling the powering. The valve system in return is operated by a control unit conveying control signals to the valve system via a signal communication pathway. The communication pathway may comprise a power link or pressure tubes with a liquid or a gas. In one embodiment the gas used is of a lower molecular weight than 28.9 kg/kmol and thereby lower than air, whereby the speed of the pressure signals being sent from the control unit is increased and thereby the operational speed of the aerodynamic devices. The invention further relates to a wind turbine comprising a tower, a nacelle mounted to one end of the tower, and a rotor with at least one wind turbine blade according to the above. | 09-08-2011 |
| 20110210644 | SLIP RING ASSEMBLY WITH SHAFT HOLDER - The present invention relates to a slip ring assembly | 09-01-2011 |
| 20110209795 | METHOD AND AN APPARATUS FOR PRODUCING A MULTIAXIAL FABRIC - A method and an apparatus for producing a multiaxial fabric are disclosed. According to the method at least one yarn is arranged helically about at least two conveyor portions, thereby providing a weft having a first weft portion having yarns arranged at an angle, θ, with respect to the conveying direction of the conveyor portions, and a second weft portion having yarns arranged at an angle, −θ, with respect to the conveying direction of the conveyor portions. Centre sections of the first weft portion and the second weft portion are then fixated to each other, e.g. by stitching and/or by applying a resin to the centre sections. Side portions of the weft are then cut, thereby separating the first weft portion from the second weft portion. Finally, rim sections of the first weft portion are fixated to rim sections of the second weft portion, e.g. by stitching and/or by applying a resin to the rim sections. The combination of helically winding the yarn about the conveyor portions, fixating the centre sections to each other, cutting the side section and fixating the rim sections to each other ensures that it is not necessary to cut away material, and the material used for making the well is therefore utilised to the greatest possible extent. | 09-01-2011 |
| 20110206512 | WIND TURBINE BLADE LOAD SENSOR - A wind turbine rotor blade root load sensor is provided. The sensor is configured to be internally mounted within an insert of a root portion of a wind turbine rotor blade. The sensor comprises a carrier member which is configured to be fixedly connected to the insert so that loads can be transmitted therebetween and the sensor further comprises a sensing element, supported by the carrier member. | 08-25-2011 |
| 20110204738 | Method For Estimating The Magnetization Level Of One Or More Permanent Magnets Established In One Or More Permanent Magnet Rotors Of A Wind Turbine Generator And Wind Turbine - A method for estimating the magnetization level of one or more permanent magnets established in one or more permanent magnet rotors of a wind turbine generator includes the steps of: establishing one or more magnetization sensors at the stator of the generator, connecting the one or more magnetization sensors to a measuring mechanism, processing measured data in the measuring mechanism, and establishing values of magnetization. Furthermore the invention also relates to a wind turbine. | 08-25-2011 |
| 20110203219 | METHOD OF ERECTING A TOWER - The disclosure relates to a method of erecting a tower comprising; —providing a foundation ( | 08-25-2011 |
| 20110200435 | SERVICE CRANE FOR A WIND TURBINE - The present invention relates to a service crane for a wind turbine comprising a nacelle and a hub. One or more wing blades is attached to the hub via a wing pitch bearing, and the service crane comprises an attachment foundation for connection to the hub. The service crane is adapted to be mounted on the wind turbine during operation and to be dismounted when not being used. The attachment foundation of the service crane is mounted on the hub of the wind turbine via the wing pitch bearing. | 08-18-2011 |
| 20110198965 | SLIP RING ASSEMBLY WITH COOLING - The present invention relates to a slip ring assembly for providing electricity to or from a rotor rotating in relation to a stator in a generator or an electrical motor. The slip ring unit rotates around a centre axis and has at least one first slip ring with an outer surface, a diameter, and a width. Also, the assembly comprises at least one conductive means, such as a brush, having conductive contact with the surface of the slip ring, and a housing in which the slip ring unit and the conductive means are situated. Furthermore, the assembly has a suction means in connection with the housing for suction of gas from within the housing out through a suction outlet in the housing. In addition, the housing has a suction inlet which is connected with a guiding means. The guiding means has an aperture facing the slip ring surface, and the aperture is positioned at a predetermined distance from the surface of the slip ring so that the gas is able to cool the surface of the slip ring. Also, the invention relates to a generator and a wind turbine having such a slip ring assembly. | 08-18-2011 |
| 20110198174 | ADJUSTABLE SUSPENSION ARRANGEMENT FOR WIND TURBINE TOWERS - The present invention relates to a wind turbine tower suspension arrangement comprising magnetic attachment means adapted to magnetically secure the suspension arrangement to an inner surface portion of the wind turbine tower. The suspension arrangement further comprises guiding means adapted to guide an element suspended in a substantially longitudinal direction of the wind turbine tower, the guiding means being connected to the magnetic attachments means. Moreover, the present invention relates to the method for applying a wind turbine tower suspension arrangement. | 08-18-2011 |
| 20110193344 | Control 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 |
| 20110191033 | SYSTEM FOR MONITORING A RESTORATION FACTOR OF A WIND TURBINE POPULATION - A system for monitoring the quality of maintenance performed on a wind turbine. A restoration factor is used to determine the quality of maintenance performed of the wind turbine. A restoration factor determined after a scheduled maintenance is compared to historical and comparative references to determine the quality of the maintenance performed on the wind turbine. Based upon these comparisons, maintenance of the wind turbine may be modified to increase the capacity of the wind turbine. | 08-04-2011 |
| 20110189025 | METHOD OF MANUFACTURING A SPAR FOR A WIND TURBINE FROM ELEMENTS COMPRISING DIFFERENT MATERIALS - The invention provides a method of manufacturing a spar ( | 08-04-2011 |
| 20110188988 | PLAIN BEARING FOR A WIND TURBINE BLADE AND METHOD OF OPERATING A WIND TURBINE HAVING SUCH A PLAIN BEARING - A plain bearing assembly for mounting a blade to a hub of a wind turbine includes an outer member mountable to one of the blade or hub, and an inner member mountable to the other of the blade or hub and movable relative to the outer member. The plain bearing further includes fluid cavities associated with one of the outer or inner member and arranged to confront the other of the outer or inner member. The fluid cavities are coupled to a pressure source for establishing a pressurized fluid film between the inner and outer members. A method includes monitoring at least one parameter of the fluid film, comparing the at least one parameter to a threshold criteria, and altering a dynamic state of the wind turbine and/or altering the state of the blade bearing assembly if the threshold criteria is exceeded. | 08-04-2011 |
| 20110187083 | TELESCOPIC VEHICLE AND METHOD FOR TRANSPORTING A LONG OBJECT - A telescopic vehicle for road transport of at least one long object, comprising: a rear vehicle portion being supported by at least one pair of wheels, the rear vehicle portion having a rear support structure for supporting the long object; and a front vehicle portion being telescopically connected to the rear vehicle portion to enable adjustment of a total length of the vehicle, the front vehicle portion having a front support structure for supporting the long object. At least one of the rear support structure and the front support structure is configured to allow relative movement between the long object and the respective vehicle portion, when the total length of the vehicle is adjusted. | 08-04-2011 |
| 20110184665 | WIND TURBINE ROTOR BLADE COMPRISING AN EDGE-WISE BENDING INSENSITIVE STRAIN SENSOR SYSTEM - A wind turbine rotor blade having a strain sensor system is described. The strain sensor is insensitive to the effect of twisting motions or edge-wise bending on the measurement of the strain. The sensor comprises one or more strain sensing devices arranged in a circular or regular polygon shaped path enclosing a region of the component. In the sensor system, a plurality of strain sensors are spaced longitudinally along a flap-wise axis of the wind turbine rotor blade, | 07-28-2011 |
| 20110184572 | Method for Setting an Output Voltage level of a Wind Power Plant - The present invention addresses the problem of avoiding that wind turbine voltage levels within a wind power plant do not exceed predetermined overvoltage and/or undervoltage protection levels. In particular, the present invention relates to shifting of an output voltage level of a wind power plant in order to protect an internal power plant grid against overvoltages. | 07-28-2011 |
| 20110182750 | ACCESS APPARATUS FOR A WIND TURBINE AND METHOD OF USING SAME - A wind turbine having a tower and a rotor hub that is supported by the tower. At least one blade extends from the rotor hub, and a nacelle is located proximate the rotor hub. The wind turbine also has a transport conduit that selectively provides communication between an interior of the nacelle and an interior of the rotor hub. The transport conduit may have a collapsed condition in which the transport conduit is located completely within the nacelle, and an extended condition in which the transport conduit partially extends into the interior of the rotor hub. In a specific embodiment, the transport conduit is a telescoping structure. A method for using the transport conduit includes accessing the interior of the nacelle to position an object therein and transporting the object to the interior of the rotor hub using the transport conduit. | 07-28-2011 |
| 20110182730 | WIND TURBINE BLADE WITH DAMPING ELEMENT FOR EDGEWISE VIBRATIONS | 07-28-2011 |
| 20110182712 | METHOD OF CONTROLLING A WIND POWER PLANT - It is presented a method for controlling the instantaneous power output from a wind power plant. Wind speed and wind directions are determined, wherein an upper limit power output for the specific wind speed and wind direction is determined from a previously measured power output value at the same wind speed and wind direction, and wherein the power output of the wind power plant is controlled based on the determined upper limit power output. A wind power plant is also presented. | 07-28-2011 |
| 20110179884 | TEST RIG FOR TESTING BLADES FOR A WIND TURBINE - The invention provides a test rig for testing blades for a wind turbine, the test rig comprising a fixing structure where a root end of a wind turbine blade can be fixed, a loading mass structure extending from the fixing structure, and an actuation structure which can apply a sinusoidal force to the loading mass structure so that a counterbalanced resonance is established between the loading mass structure and a blade which is fixed in the fixing structure. Due to the counterbalanced resonance, the force from the test rig onto the floor or other building components can be reduced relative to that known from the traditional rigs for blade testing. | 07-28-2011 |
| 20110178771 | METHOD FOR EVALUATING PERFORMANCE OF A SYSTEM FOR CONTROLLING PITCH OF A SET OF BLADES OF A WIND TURBINE - 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 |
| 20110178646 | REACTIVE POWER MANAGEMENT FOR WIND POWER PLANT INTERNAL GRID - A wind power plant comprising a plurality of wind turbine converters coupled to a High Voltage Direct Current (HVDC) converter via an internal grid and a power plant controller. The power plant controller is configured to monitor a voltage of the internal grid, and allocate responsibility for generating reactive power to the HVDC converter and the wind turbine converters to maintain the voltage of the internal grid at a desired voltage. | 07-21-2011 |
| 20110175356 | CONTROL 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 |
| 20110175355 | TURBINE 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 |
| 20110175354 | Method 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 |
| 20110175352 | METHOD 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 |
| 20110173811 | Method Of Servicing The Outer Components Of A Wind Turbine Such As The Wind Turbine Blades And The Tower With A Work Platform And Work Platform - A method of servicing a wind turbine generally comprises rotating a rotor of the wind turbine until a blade extends downwardly next to the wind turbine tower. A work platform is positioned next to the tower with at least one steering wheel in contact with the tower. The work platform is connected to an upper part of the wind turbine with at least one cable and then moved vertically and horizontally to a first position. A section of the blade within reach is serviced in the first position, and then the work platform is moved vertically and horizontally to a second position for servicing a different section of the blade. The steering wheel is in contact with the tower when the work platform is moved. | 07-21-2011 |
| 20110171032 | METHOD OF MANUFACTURING A SPAR FOR A WIND TURBINE FROM ELEMENTS HAVING GEOMETRICALLY WELL-DEFINED JOINT SURFACE PORTIONS - The invention provides a method of manufacturing a spar ( | 07-14-2011 |
| 20110168654 | METHOD FOR HANDLING AND/OR SERVICING COMPONENTS OF A WIND TURBINE AND A GRIPPING APPARATUS FOR PERFORMING THE METHOD - The Invention relates a method and an apparatus for handling and/or servicing components of a wind turbine, such as installing and/or dismantling components into or from a wind turbine nacelle or such as servicing exterior components such as blades, hub, tower and nacelle of the wind turbine. The gripping apparatus comprising at least one arm for gripping around the wind turbine tower, said at least one arm capable of forming a gap between gripping elements of the gripping apparatus. The at least one arm extends around the entire outer circumference, seen perpendicular to a horizontal plane, of the wind turbine tower. | 07-14-2011 |
| 20110163546 | METHOD 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 |
| 20110163544 | METHOD 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 |
| 20110158818 | A Hub Enclosure for a Hub of a Wind Turbine - A hub enclosure ( | 06-30-2011 |
| 20110158805 | PITCH CONTROL SYSTEM - The present invention relates to a pitch control system for operating the blade pitch of the rotor blades of a wind turbine generator. A method is disclosed wherein a command signal or pitch demand is applied to the blade pitch system of the rotor blades and the resulting response signal or pitch response is received. The received pitch response is compared to a reference and a signal indicative of a pitch system fault may be generated if a difference between the response signal and the reference is detected as being larger than a preset criterion. The deviating behaviour of a blade pitch system can thereby be detected which enables a testing or monitoring of the condition of the pitch system of the rotor blades of a wind turbine generator. | 06-30-2011 |
| 20110158788 | A SECTIONAL BLADE - The invention provides a sectional blade for a wind turbine. The blade comprises at least a first blade portion and a second blade portion extending in opposite directions from a joint. The first blade portion and the second blade portion are structurally connected by at least one spar bridge extending into both blade portions to facilitate joining of said blade portions. | 06-30-2011 |
| 20110155420 | ARRANGEMENT FOR CABLE GUIDING AND A WIND TURBINE USING SUCH ARRANGEMENT - The present invention relates to an arrangement ( | 06-30-2011 |
| 20110154757 | TOWER SECTION FOR A WIND TURBINE TOWER - The invention relates to a tower section for assembling a wind turbine tower. The tower section comprises a flange at least at one end of the tower section. The flange is provided with holes for the connection elements. The flange have a first array of holes, where each hole is arranged in a first angle (α) relative to a longitudinal axis of the tower section, and a second array of holes, where each hole is arranged in a second angle (β) relative to the longitudinal axis. The first angle (α) is different from the second angle (β). The invention also relates to a foundation comprising a flange, where the flange of the foundation has characteristics corresponding to the characteristics of the tower section flange. The invention also relates to a wind turbine tower and to a wind turbine. | 06-30-2011 |
| 20110153099 | METHOD AND SYSTEM FOR CONTROLLING A WIND POWER PLANT COMPRISING A NUMBER OF WIND TURBINE GENERATORS - This invention relates to a method and a system ( | 06-23-2011 |
| 20110150655 | Lubrication System for a Gear System for a Wind Turbine - A lubrication system ( | 06-23-2011 |
| 20110150631 | TORSIONAL DYNAMIC DAMPER FOR A WIND TURBINE AND METHOD OF USING SAME - A wind turbine includes a tower, a nacelle located adjacent a top of the tower, a rotor coupled to the nacelle, and a dynamic vibration damper coupled to the tower and configured to dampen vibrations induced in the tower in a torsional direction while negligibly effecting vibrations induced in the tower in bending directions. The dynamic vibration damper may be tuned to a resonant frequency of the wind turbine in the torsional direction. A method of retrofitting a wind turbine with a vibration damper is also disclosed. | 06-23-2011 |
| 20110148198 | POWER CONVERSION SYSTEM AND METHOD - A power conversion system for converting electrical power from at least one power source includes a plurality of converter chains which couple the at least one power source to at least one load. At least two of the converter chains comprise an associated dissipating unit. The dissipating units are coupled via at least one switch. A controller is arranged to control the at least one switch to route power to be dissipated from one of the converter chains to the converter chain's associated dissipating unit, or to at least one of the other dissipating units, or to the converter chain's associated dissipating unit and to at least one of the other dissipating units, to cause corresponding dissipation of the power to be dissipated. | 06-23-2011 |
| 20110148114 | Method 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 |
| 20110148113 | VIBRATION 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 |
| 20110148112 | Control 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 |
| 20110142663 | ASSEMBLY AND METHOD OF PREPARING AN ASSEMBLY - The invention relates to a method of preparing an assembly, comprising providing a first structure; providing a second structure; providing at least one flexible adhesive limiting member extending between said structures; and providing an adhesive between said structures to bind said structures to each other; wherein the adhesive is limited by the flexible adhesive limiting member such that a concave front line surface of the adhesive is defined. The invention also relates to such an assembly as well as to a wind turbine rotor blade, and to a wind turbine, comprising such an assembly. | 06-16-2011 |
| 20110142616 | NACELLE FOR WIND TURBINE - A nacelle for a wind turbine comprises a plurality of walls connected with each other to define an internal space of the nacelle. A support beam is disposed at an inner surface of the connecting area of at least one set of contiguous walls of the plurality of walls, and a portion of the support beam contacting the contiguous walls has a shape mating with that of the inner surface of the connecting area. The nacelle for a wind turbine is simple in structure, convenient to transport, easy to assemble and strong in the mechanical connecting strength. | 06-16-2011 |
| 20110142598 | Drive Train for a Wind Turbine - A drive train for a wind turbine, comprising a main bearing arrangement in the form of a single locating bearing arranged to support a main shaft. An outer raceway of the main bearing is coupled to a support structure, such as a base frame of a nacelle, via flange parts arranged on the outer raceway and the support structure, respectively. The flange parts define interfacing surfaces extending in a plane which is arranged non-parallel, preferably substantially perpendicular, to the rotational axis of the main shaft. Thereby a service friendly design is obtained, in which the main bearing and/or the main shaft can be repaired and/or replaced without having to remove the rotor from the nacelle. | 06-16-2011 |
| 20110140433 | METHOD 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 (P | 06-16-2011 |
| 20110135478 | NACELLE TRAVELLING CRANE - The present invention relates to an overhead travelling crane ( | 06-09-2011 |
| 20110135476 | EMBEDDED FIBRE OPTIC SENSOR FOR WIND TURBINE COMPONENTS - A fibre optic sensor is embedded in an integral housing block formed by moulding or extrusion. The housing block has a mounting surface for attachment to a wind turbine component by adhesive or mechanical connection. In an arrangement where the sensor is to be isolated from strains on the component, the housing block may be mounted on the component by means of a smaller mounting portion, joining the mounting portion at a neck region. | 06-09-2011 |
| 20110133461 | Operating 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 |
| 20110123346 | WIND TURBINE BLADE - The invention relates to a wind turbine blade having at least one component formed of a fibrous composite material including two or more different types of carbon fibres having a different elastic modulus to each other. The proportions of the different types of fibres vary in the longitudinal direction of the blade such that the elastic modulus of the fibrous composite material increases towards the tip end of the blade. The two or more different types of carbon fibres may be incorporated in an inner beam and/or in the outer shell portions of the blade. | 05-26-2011 |
| 20110123274 | METHOD FOR ERECTING A WIND TURBINE ON AN OFFSHORE SITE AND A VESSEL FOR ERECTING A WIND TURBINE ON AN OFFSHORE SITE - The invention relates to a method for erecting a wind turbine on an offshore site, said method comprises the steps of positioning a first boom of a crane in a substantially horizontal position, arranging a substantially horizontal positioned elongated wind turbine component on said first boom, connecting a distal part of said elongated wind turbine component to a second boom of said crane, said distal part is the upper part of the wind turbine component when the wind turbine is erected, and said second boom is extending at an angle from the longitudinal extension of said first boom, elevating said first boom to a substantially vertical position, modifying the position in the horizontal plane of said elongated wind turbine component, in order to reach a desired erecting position for the component, and disconnecting said distal part of said elongated wind turbine component from said second boom of said crane. The invention also relates to a vessel for erecting a wind turbine on an offshore site. | 05-26-2011 |
| 20110116927 | Wind Turbine Blade - The invention relates to a wind turbine blade with at least one control surface and an actuator inside the main body of the wind turbine blade for moving the control surface, wherein the actuator comprises a fluidic muscle, a controller and a pump, and wherein the fluidic muscle is adapted to change in length and width when the pressure of the fluid within the fluidic muscle is varied. | 05-19-2011 |
| 20110115224 | METHOD 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 |
| 20110110778 | MEASURING LOADS ON WIND TURBINE BLADES - A sensor system for measuring aerodynamic loads acting on a wind turbine rotor blade is disclosed. The measured aerodynamic loads can be converted to an angle of attack of the resulting wind which flows past the moving rotor blade. The sensor is realised as a trailing edge flap which is elastically moveable relative the main part of the wind turbine blade. By measuring motion of the trailing edge flap or corresponding motions of components of the sensor system, the aerodynamic forces acting on the blade can be determined. Due to the relative small dimensions of the sensor flap and the relative small displacements of the flap, the sensor system only affects the aerodynamic properties insignificantly. | 05-12-2011 |
| 20110110777 | ACTIVE FLOW CONTROL DEVICE AND METHOD FOR AFFECTING A FLUID BOUNDARY LAYER OF A WIND TURBINE BLADE - An active flow control device ( | 05-12-2011 |
| 20110109279 | METHOD 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. | 05-12-2011 |
| 20110106470 | SYSTEM AND METHOD FOR MONITORING POWER FILTERS AND DETECTING POWER FILTER FAILURE IN A WIND TURBINE ELECTRICAL GENERATOR - Method, system, and computer readable medium for determining a fault in a power filter of a wind turbine generator. The method may include the steps of calculating a reactive power consumed by the power filter, and comparing the calculated reactive power to a predefined threshold reactive power to determine the fault. | 05-05-2011 |
| 20110106325 | CONTROLLER ARRANGEMENT OF AN ELECTRICAL POWER TRANSFER SYSTEM OF A WIND TURBINE - A controller arrangement of an electrical power transfer system ( | 05-05-2011 |
| 20110103964 | METHOD OF MANUFACTURING A LAMINATED COMPOSITE ITEM BY A WINDING PROCESS, RELATED APPARATUS AND PRODUCT - The present invention relates to a method of manufacturing a laminated composite item ( | 05-05-2011 |
| 20110103933 | WIND TURBINE ROTOR, A WIND TURBINE AND USE THEREOF - The invention relates a wind turbine rotor. The rotor comprises at least one wind turbine blade, at least one image capturing device, and one or more markers arranged on the blade so that the at least one image capturing device may detect the position of the markers. The invention further relates to a wind turbine and use thereof. | 05-05-2011 |
| 20110095539 | Cooling system for a wind turbine - A wind turbine having a cooling system, which wind turbine includes a nacelle in connection with which one or more wind turbine components are arranged, is disclosed. The cooling system includes at least one cooling circuit arranged to lead a heat transfer medium to and from one or more of the wind turbine components, at least one cooling device arranged to cool the heat transfer medium, at least one pump arranged in connection with the at least one cooling circuit to circulate the heat transfer medium in the cooling circuit, and at least one medium tank arranged in connection with the cooling circuit. The at least one medium tank is arranged inside the nacelle. | 04-28-2011 |
| 20110094987 | APPARATUS AND METHOD FOR ASSEMBLING WIND TURBINES - An apparatus for assembling a wind turbine includes a crane boom having a main bearing cable coupled to a component for lifting the component during assembly of the wind turbine, and a control mechanism coupled to the crane boom for controlling the orientation of the wind turbine component during the lift. The control mechanism includes a guide member coupled to the crane boom, a movable member coupled to the guide member and configured to be movable relative to the crane boom, a coupling member configured to couple the movable member to the wind turbine component being lifted by the crane boom, and a drive mechanism configured to actively move the movable member relative to the crane boom independent of the movement of the main bearing cable. A method for assembling a wind turbine includes using the coupling member to change the orientation of the component. | 04-28-2011 |
| 20110091684 | METHOD FOR MANUFACTURING A COMPOSITE BODY AND A COMPOSITE BODY MANUFACTURING ARRANGEMENT - A method of forming a composite body using a mould and an automated fiber placement machine comprising a fiber placement head, the method including moving the fiber placement head past the mould and depositing on the mould a plurality of fiber tows, the fiber tows being deposited side by side in a direction perpendicular to the movement of the fiber placement head and perpendicular to the direction of a normal of a surface of the mould where the fiber tows are deposited, thus forming a ply with a plurality of fiber tows placed side by side on the mould, wherein the fiber tows in the ply comprise first and second fiber tows having respective first and second fiber materials that are different from each other. | 04-21-2011 |
| 20110091326 | Sectional Blade - The invention provides a sectional blade for a wind turbine. The blade comprises at least a first blade portion and a second blade portion extending in opposite directions from a joint. Further each blade portion comprises a spar section forming a structural member of the blade and running lengthways. The first blade portion and the second blade portion are structurally connected by at least one spar bridge extending into both blade portions to facilitate joining of said blade portions and the spar bridge joins the spar sections. | 04-21-2011 |
| 20110085911 | FIXING DEVICE - A fixing device for fixating a segment of a wind turbine blade to a mold in which the blade segment is manufactured, wherein the blade segment has a fixating portion. The fixing device comprises: a first portion for removably fixating the blade segment at its fixating portion to the mold; and a second portion for fixating the fixing device to the mold. | 04-14-2011 |
| 20110084485 | Control 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 |
| 20110081248 | Wind Turbine Blade - A sectional blade for a wind turbine comprising a first and a second blade section extending in opposite directions from a blade joint, and each blade section comprising a spar section forming a structural member of the blade. The blade sections are structurally connected by a spar bridge extending into the first and second blade sections to facilitate joining of the blade sections. The spar bridge comprises a stiffening member protruding from the spar bridge in a chord wise direction of the blade for increasing the edgewise stiffness of the blade, and wherein a part of the surface of the stiffening member is shaped to follow an inner surface contour of the blade. A method of manufacturing such a sectional blade is also disclosed. | 04-07-2011 |
| 20110081247 | Wind Turbine Blade - A sectional blade for a wind turbine comprising a first and a second blade section extending in opposite directions from a blade joint, and each blade section comprising a spar section forming a structural member of the blade. The blade sections are structurally connected by a spar bridge over a spar joint, which comprises a center beam of two extending beam caps joined by one or more extending beam webs. The spar joint further comprises at least two extending spar caps and one or more extending spar webs connecting the spar caps to opposite sides of the center beam. A method of manufacturing such a sectional blade is also disclosed. | 04-07-2011 |
| 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 |
| 20110073237 | MOULD FOR MANUFACTURING OF WIND TURBINE BLADES - A mould system for manufacturing wind turbine blades includes two mould halves shaped for moulding respective mould halves. A first mould is supported by a hinge system which is capable of moving the mould from a first position wherein the mould faces upwards to a position wherein the first mould faces the second mould. A final linear displacement of the first mould is carried out by actuators which may be integrated with the first or the second mould. The actuators are engaged with the hinge system so that the first mould is displaceable or the hinge system holding the first mould is displaceable. In both alternatives the actuators merely transfer the load of the first mould to a support via the hinge system. | 03-31-2011 |
| 20110067795 | Assembly Tool and a Method of Manufacturing a Blade - The invention provides a method of manufacturing a wind turbine blade comprising a spar and at least one airfoil section, where both the spar and the airfoil section comprise an outer surface which forms part of an aerodynamically active surface of the blade. The method comprises steps of providing a support structure, placing the spar at the support structure, providing a clamp adapted to be fixed to the outer surface of both the spar and the airfoil section, arranging the airfoil section relative to the spar, fixing the clamp to the outer surface of the spar and the airfoil section, and assembling the at least one airfoil section an the spar by a process including adhesion. | 03-24-2011 |
| 20110054696 | OPTICAL TRANSMISSION STRAIN SENSOR FOR WIND TURBINES - The invention relates to a broad band optical strain sensing system for a wind turbine. The strain sensing system includes an optical fibre with an input at one end and an output at the opposite end. The optical fibre is provided with Bragg sensors between the input and the output. By injecting light at the input of the fibre, measuring the spectral intensity distribution of at the output of the fibre and determining spectral locations of intensity notches in the spectral intensity distribution, it is possible to determine strain values at the locations of the Bragg sensors from the transmitted light. | 03-03-2011 |
| 20110052368 | METHOD AND A SYSTEM FOR ADJUSTING ALARM LEVEL OF A COMPONENT IN A WIND TURBINE - A method and a system for adjusting alarm level of a component in a wind turbine is provided. The method comprises defining an alarm level corresponding to an operational parameter of the component in the wind turbine, monitoring the operational parameter of the component, determining whether the operational parameter exceeds the alarm level, thereby triggering an alarm. In the case when the alarm is triggered, the method further comprises inspecting the component to determine whether the alarm level corresponds to a predetermined remaining useful lifetime of the component, and adjusting the alarm level based on the inspection of the component. | 03-03-2011 |
| 20110049903 | APPARATUS AND METHOD FOR OPERATING A WIND TURBINE UNDER LOW UTILITY GRID VOLTAGE CONDITIONS - The present invention relates to a wind turbine and an associated method for controlling the output current from said wind turbine to an electric power grid, and, more particularly, to a wind turbine and a method for controlling the current under conditions of grid voltage variations due to changing grid conditions as in the case for example when a wind turbine experiences and recovers from a fault. | 03-03-2011 |
| 20110049887 | WIND 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 |
| 20110049884 | YAW 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 |
| 20110044820 | CONSOLIDATED COMPOSITE PRE-FORM - The present invention relates to a consolidated composite pre-form for reinforcing a composite structure, said pre-form comprising fibres and a binding agent, said pre-form having a sheet-like structure with an upper major surface and a lower major surface, and said pre-form being provided with recesses on at least a portion of at least one of said major surfaces. | 02-24-2011 |
| 20110043186 | METHOD FOR CONTROLLING A GRID VOLTAGE - The present invention relates to a method for controlling a voltage level of a power supply grid operationally connected to a source of electrical power, the method comprising the steps of determining a short circuit impedance of the power supply grid at a point of common coupling, calculating, using the determined short circuit impedance, a gain value of the power supply grid, and controlling the grid voltage level in accordance with the calculated gain value by applying said gain value as a gain parameter in a voltage controller. The method according to the present invention may be implemented as a method for configuring a voltage controller once and for all, or it may be implemented as a method for adaptively adjusting a gain of a voltage controller. | 02-24-2011 |
| 20110040497 | METHOD FOR SENSING STRAIN IN A COMPONENT IN A WIND TURBINE, OPTICAL STRAIN SENSING SYSTEM AND USES THEREOF - The invention relates to a method for sensing strain in a component in a wind turbine comprising an optical sensor system. The method comprises the step of inputting a optical signal into at least one optical fibre of said sensor system comprising one or more fibre Bragg grating sensors. Further, the method comprises the step of measuring the transmitted optical signals of said one or more sensors with at least one light detector connected to the other end of said at least one optical fibre, and processing the measured signals in a control unit in order to establish a value of the strain for the component. The invention also relates to an optical strain sensing system for a component in a wind turbine and uses hereof. | 02-17-2011 |
| 20110040414 | METHODS FOR CONTROLLING A WIND TURBINE CONNECTED TO THE UTILITY GRID, WIND TURBINE AND WIND PARK - 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, as well as wind turbines and wind parks comprising at least two wind turbines. | 02-17-2011 |
| 20110027095 | METHOD OF MANUFACTURING A COMPOSITE PART FROM RESIN-PREIMPREGNATED FIBRES - The present invention relates to a method of manufacturing a laminated composite part from a number of layers of resin-preimpregnated fibres ( | 02-03-2011 |
| 20110025059 | Power 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 |
| 20110020134 | LIGHTNING RECEPTORS COMPRISING CARBON NANOTUBES - The present invention relates to a wind turbine rotor blade comprising a lightning protection system. The lightning protection system comprises a lightning receptor for capturing lightning strikes. The receptors are arranged in the rotor blade. The lightning receptors comprise carbon nanotubes. In embodiments, the nanotubes are at an exterior surface is provided with a layer of carbon nanotubes and/or at least part of the lightning receptor is of a carbon nanotube metal composite material, such as a carbon nanotube metal matrix composite material. Moreover, the exterior surface of the receptor may in embodiments be provided with one or more electric field enhancing protrusions. | 01-27-2011 |
| 20110020131 | MANUFACTURING WTG BLADE HAVING A SPAR - Within the field of wind turbine generators (WTG), to provide a consistent way of manufacturing a WT blade there is disclosed a blade mould and a blade spar fixture to support the spar in the mould so as to provide a fixed predetermined relative position, and preferably also orientation, between at least a root end, such as a bushing in the root end of the blade spar, and a root end of the mould. Overall consistency is also obtained in that hereby a blade with anticipated aerodynamic and strength characteristics is provided, among others in that at least adjacent to the root of the spar there is substantially the same distance for a cured adhesive between an innermost surface of each of blade shells and an outermost surface of the spar. | 01-27-2011 |
| 20110014048 | HYDRAULIC SYSTEM AND METHOD FOR OPERATING A BRAKE OF A WIND TURBINE - A hydraulic system and method for controlling the brake of a wind turbine are provided. During operation of the wind turbine, pressurized working fluid in the hydraulic system is blocked from being supplied to the brake. Even if some of this fluid does reach the brake, it is drained to prevent a pressure build-up and activation. To activate the brake, this drainage is stopped and the pressurized fluid is supplied to the brake. The blocking and unblocking the pressurized working fluid may be controlled by first and second activation valves arranged in parallel in a supply line that communicates the working fluid to the brake. | 01-20-2011 |
| 20110008166 | HYDRAULIC STATION AND METHOD FOR CONTROLLING PRESSURE IN A HYDRAULIC SYSTEM OF A WIND TURBINE - A hydraulic station in a hydraulic system of a wind turbine includes a tank for storing working fluid, first and second pumps fluidly connected to the tank, first and second flow paths extending from the respective first and second pumps to a hydraulic circuit, and first and second relief valves in fluid communication with the respective first and second flow paths. The first pump and first relief valve are controlled based on maintaining pressure of the working fluid in the hydraulic circuit between a first minimum limit and first maximum limit. If the pressure falls below the first minimum limit, the second pump and second relief valve are controlled in addition to the first pump and first relief valve, with the control then based on a second maximum limit and second minimum limit. | 01-13-2011 |
| 20110006541 | Wind Turbine with Improved Yaw Control - A wind turbine having a tower and a nacelle mounted on top of the tower. The turbine further includes a bearing for a yaw motion of the nacelle in relation to the tower, and a drive assembly for the yaw motion. The device assembly includes at least one power unit fixedly connected to the nacelle. The power unit has a motor and a wheel adapted to be driven by the motor and in engagement with a ring fixedly connected to the tower for effecting the yaw motion, wherein a region of engagement of the ring with the wheel is located separate from the bearing, characterized in that the motor is located below the wheel. Preferably, the bearing is a friction bearing comprising an insert portion fixedly connected to the nacelle, and a clamp portion fixedly connected to the tower and in clamping engagement with the insert portion. | 01-13-2011 |
| 20110006538 | MONOPILE FOUNDATION FOR OFFSHORE WIND TURBINE - The invention relates to methods for installing a wind turbine. A method may comprise the steps of establishing a substructure, said substructure comprising at least one pipe ( | 01-13-2011 |
| 20110004356 | EVENT-BASED CONTROL SYSTEM FOR WIND TURBINE GENERATORS - The present invention relates to a control system comprising a control interface between one or more wind turbine generators and a power grid, where the wind turbine generators are coupled to the power grid and contribute to the power production of the grid. The control interface is arranged to receive a set of event data. In embodiments, the set of event data may be any data available to a SCADA system. The set of event data is analysed in terms of predetermined event rules comprising at least one predefined event condition and a set of adaptive event conditions. Based on the analysis an event output is provided in order to control a parameter of the one or more wind turbine generators. In embodiments, the control system may be implemented in, or in connection with a SCADA system, moreover, the event output may be based on fuzzy logic, a neural network or statistical analysis. | 01-06-2011 |
| 20110001319 | DIAGNOSIS 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 |
| 20110000640 | WIND TURBINE GENERATOR WITH A HEAT EXCHANGER - The present invention relates to a wind turbine generator with a heat-generating source, e.g. a generator or a gear-box. A primary and a secondary cooling circuit, arranged for circulating a first and a second fluid, respectively between the heat-=generating source and a heat exchanger, and a cooling reservoir and the heat exchanger, respectively. The heat exchanger comprises a plurality of pipes for conveying the second fluid from the secondary cooling circuit through the heat exchanger, the plurality of substantially parallel pipes being arranged for heat exchange with a flow of the first fluid from the primary cooling circuit. The secondary cooling circuit further comprises a dispersion chamber connected to the plurality of pipes, the dispersion chamber having a fluid intake being positioned sideways relative to the plurality of pipes so as to provide, at least partly, a levelling of the flow distribution across the plurality of pipes of the second fluid prior to heat exchange. The invention provides an improved and more compact heat exchanger due to the more uniform flow distribution of the second fluid. | 01-06-2011 |
| 20110000608 | APPARATUS FOR PREPARING A PRE-FORM - The present invention provides an apparatus and a method for preparing a pre-form ( | 01-06-2011 |
| 20100332272 | Method and a system for controlling operation of a wind turbine - A method and a system for controlling operation of a wind turbine are provided. The method includes determining at least one failure mode relating to one or more components of the wind turbine, estimating a remaining lifetime of the component under current operating conditions, determining one or more control schemes to control the operation of the wind turbine in order to adjust the remaining lifetime of the component to a desired remaining lifetime of the component, determining a power production yield for the determined one or more control schemes and selecting a determined control scheme for controlling the operation of the wind turbine that maximizes the power production yield. | 12-30-2010 |
| 20100332040 | CURRENT CONTROL OF A WIND PARK - A method for controlling a current in a wind park is provided. The wind park includes at least one wind turbine and at least one current generator. The method includes detecting a grid irregularity, determining an optimal current to be provided at a predetermined location in the wind park during the grid irregularity and determining a corresponding current to be generated from the at least one current generator so as to provide the optimal current at the predetermined location. The corresponding current is determined based on at least an impedance value between the at least one current generator and the predetermined location. | 12-30-2010 |
| 20100329865 | LIGHTNING PROTECTION MESH - A lightning protection mesh for a blade of a wind turbine comprising a first set of wires running in a first direction, and a second set of wires running in a second, different direction. The mesh has at least one tapered end at which wires from at least one of the first and second set of wires run together. The total conducting cross-sectional area formed by the wires in the tapered end is maintained within the tapered end, and the wires are bundled at the tapered end to provide an electrical connection to the mesh. | 12-30-2010 |
| 20100327599 | WIND POWER PLANT PREDICTIVE PROTECTION CIRCUIT - The present invention relates to a method of operating of a wind power plant comprising a circuit breaker and at least one wind turbine generator electrically connectable to an electrical grid through said circuit breaker, the method comprising the steps of detecting at least one condition for the circuit breaker to trip by means of a sensor; informing a control means of this detection prior to the circuit breaker disconnecting; and preparing the at least one wind turbine generator before said circuit breaker disconnects said at least one wind turbine generator from said electrical grid. | 12-30-2010 |
| 20100327585 | Control 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 |
| 20100320763 | METHOD 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 |
| 20100316450 | METHOD FOR INSTALLING AN OFFSHORE WIND TURBINE AND A BARGE SYSTEM - The invention relates to a method for installing an offshore wind turbine ( | 12-16-2010 |
| 20100314884 | WIND TURBINE, A METHOD FOR REDUCING NOISE EMISSION FROM A WIND TURBINE TOWER AND USE OF A WIND TURBINE - The invention relates to a wind turbine ( | 12-16-2010 |
| 20100314883 | METHOD FOR DAMPING OSCILLATIONS IN A WIND TURBINE - The present invention relates to a method for damping oscillations in a wind turbine comprising a wind turbine tower, a nacelle arranged on top of said wind turbine tower, and a number of rotor blades rotatably connected to the nacelle. The oscillations to be damped originate from forces induced on the nacelle and the wind turbine tower by the rotating rotor blades. The method comprises the steps of providing an internally suspended pendulum mass structure being operationally connected to an upper tower section, providing a platform being fixedly attached to the upper tower section, and providing damping means comprising one or more friction members being displaceably arranged relative to the platform, the one or more friction members being adapted to be displaced relative to the platform in response to relative movements between the suspended pendulum mass structure and the platform in order to dissipate energy from the suspended pendulum mass structure by friction. | 12-16-2010 |
| 20100314028 | STRUCTURAL MAT FOR REINFORCING A WIND TURBINE BLADE STRUCTURE, A WIND TURBINE BLADE AND A METHOD FOR MANUFACTURING A WIND TURBINE BLADE - The invention relates to a structural mat for reinforcing a wind turbine blade structure. The structural mat comprises two or more groups of bonded fibres, the fibres being bonded by a matrix substantially preventing relative movement of said fibres and wherein said groups are connected to each other by connection means limiting the relative movement of said groups. The invention further relates to a wind turbine blade and a method for manufacturing a wind turbine blade. | 12-16-2010 |
| 20100310380 | METHOD FOR PREPARING A PRE-FORM - The invention provides a method for preparing a pre-form comprising at least two layers of fibre tows ( | 12-09-2010 |
| 20100310372 | ACTUATION OF MOVABLE PARTS OF A WIND TURBINE ROTOR BLADE - A rotor blade for a wind turbine comprises a rotor blade body with a root for connecting the rotor blade to a hub of a wind turbine, a tip, a leading edge and a trailing edge. The blade has a movable part, and motion transmitting means for connecting to an actuator being placed preferably outside the blade body, and transmitting motion from the actuator to the movable part. The motion transmitting means is electrically non-conductive, whereby the risk of lightning stroke accidents is reduced. | 12-09-2010 |
| 20100308585 | APPARATUS 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 |
| 20100303626 | EPICYCLIC GEAR STAGE FOR A WIND TURBINE GEARBOX, A WIND TURBINE GEARBOX AND A WIND TURBINE - The invention relates to an epicyclic gear stage for a wind turbine gearbox comprising a sun gear, at least two planet gears, engaged with said sun gear, an annulus gear, and a planet carrier. Torque from the wind turbine rotor is transferred via a torque transfer part connected to said planet carrier and said torque transfer part is flexible connected to said planet carrier at one or more joints. | 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 |
| 20100301604 | WIND 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 |
| 20100298995 | METHOD AND SYSTEM FOR CONTROLLING OPERATION OF A WIND TURBINE - Methods and systems for controlling operation of a wind turbine. The method may comprise determining an alarm level for at least one component of the wind turbine. In the case that an alarm level for at least one component exceeds a predefined level, the method comprises estimating an expected remaining lifetime for the component under the current operating conditions, and controlling operation of the wind turbine in order to adjust the expected remaining lifetime for the component to a desired expected remaining lifetime for said component. Thereby, the expected remaining lifetime for the component can be prolonged until the next scheduled service event. Downtime of the wind turbine is considerably reduced, and unscheduled service events are avoided to the greatest possible extent. Mean time between inspections (MTBI) is also extended. | 11-25-2010 |
| 20100290918 | HUB FOR A WIND TURBINE - A hub for a wind turbine with a first end facing a nacelle of the wind turbine and a second end facing a direction opposite the nacelle. The hub has at least one opening between the first and second end, which opening is adapted for receiving a wind turbine blade, and the hub is adapted to rotate in relation to the nacelle by means of the wind turbine blade. A self-supporting front structure is connected to the second end of the hub, the front structure extending from the second end of the hub and away from the nacelle and being arranged to support a spinner module, the spinner module being adapted to house the front structure and hub. The front structure has a projecting part, which is part of the self-supporting structure and can extend from the front structure and away from the nacelle and has a connection point. | 11-18-2010 |
| 20100290905 | Wind Turbine Control Method - A method of controlling a wind turbine, where a control signal for a controllable parameter of the wind turbine is determined repeatingly at successive time steps, and a control history including respective control values derived from or included in past control signals is stored. These control values stored in the control history are then used to determine an alert parameter for the controllable parameter, the alert parameter being a function of the variations of the control signals over time. The wind turbine is then controlled according to the most recent control signal only if the alert parameter is below an alert threshold, and otherwise according to a modified control strategy. The control method may be performed on pitch reference signals for controlling the individual and/or collective pitch of the blades. The invention further relates to a control system configured to perform the above control method, and a wind turbine comprising such system. | 11-18-2010 |
| 20100286835 | POWER CURTAILMENT OF WIND TURBINES - The present invention relates to a method for curtailing electrical power supplied from a wind turbine or a group of wind turbines to an associated power supply grid, the method comprising the steps of determining an available electrical power level from the wind turbine facility and setting a wind speed independent curtailment level. The curtailment level may be a percentage of an actual available electrical power level or a fixed power level. The method further comprises the step of operating the wind turbine facility in such a way that the generated electrical power supplied from the wind turbine facility equals the difference between an actual available electrical power level and the curtailment level. The present invention further relates to a wind turbine facility and a curtailing controller for carrying out the invention. | 11-11-2010 |
| 20100283246 | WIND 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 |
| 20100283245 | WIND 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 |
| 20100281820 | METHOD FOR ESTABLISHING A WIND TURBINE ON A SITE, TRANSPORT OF A WIND TURBINE TOWER, WIND TURBINE TOWER AND VESSEL SUITABLE FOR TRANSPORTING A WIND TURBINE TOWER - Method for establishing a wind turbine ( | 11-11-2010 |
| 20100280797 | METHOD FOR DETECTION OF CHARGE ORIGINATING FROM LIGHTNING - The invention relates to a detection apparatus of a wind turbine wherein said wind turbine comprises a down-conducting system arranged to conduct current induced from lightning, wherein said detection apparatus comprises a charge measurement apparatus for establishment of a charge representation, wherein said charge representation represents charge induced into said down-conducting system by lightning, and wherein said detection apparatus further comprises an estimator for estimating deterioration induced by lightning of one or more components in a wind turbine on the basis of said charge representation. | 11-04-2010 |
| 20100274401 | METHOD FOR CONTROLLING A COMMON OUTPUT FROM AT LEAST TWO WIND TURBINES, A CENTRAL WIND TURBINE CONTROL SYSTEM, A WIND PARK AND A CLUSTER OF WIND PARKS - The invention relates a method for controlling a common output from at least two wind turbines comprising the steps of receiving at a central wind turbine control system at least one set point value of a set point parameter from a utility grid operator, and at least one operational value of a operational parameter from at least one of said wind turbines Furthermore the method comprises the steps of stablishing a cost function equation comprising at least one function variable reflecting an operational parameter of said wind turbines and said received set point parameter, solving the cost function equation with respect to said at least one function variable to find an extremum for said cost function, calculating weighted operational parameter set points for each of said wind turbines from the obtained solution, and controlling at least one of said wind turbines in relation to said weighted operational parameter set points. The invention also relates to a central wind turbine control system, a wind park and a cluster of wind parks. | 10-28-2010 |
| 20100274400 | WIND TURBINE CONFIGURATION SYSTEM - The invention relates to a wind turbine configuration system, the configuration system being configured for processing a plurality configuration parameter settings, each setting being collected from the control system of one of a plurality of comparable wind turbines, wherein the configurations system comprises a processor arranged to analyse the plurality of configuration parameter settings so as to identify a preferred range of setting for the configuration parameter, the configuration system further being configured for initiating an optimization action of configuration parameter settings based on the identified preferred range(s) of setting(s). The invention further relates to a method of processing a plurality of configuration parameter settings, and a software programme product capable of performing the method. | 10-28-2010 |
| 20100270798 | LIFETIME 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 |
| 20100269437 | FOUNDATION FOR A WIND TURBINE AND A METHOD OF MAKING A FOUNDATION FOR A WIND TURBINE - Embodiments of the invention provide a foundation for a wind turbine. The foundation includes a section which is partly embedded in a concrete section and a cover which is arranged across an intersection between the embedded section and the concrete section. In that way, intrusion of water between the sections can be prevented effectively, and the lifetime of the foundation can be increased and/or the maintenance costs can be reduced. A method of making a foundation for a wind turbine and a wind turbine with the foundation are also disclosed. | 10-28-2010 |
| 20100268849 | METHOD AND SYSTEM FOR REGISTERING EVENTS IN WIND TURBINES OF A WIND POWER SYSTEM - The invention relates to a method of registering events in a wind power system comprising at least two data processors, wherein the data processors of said wind power system are mutually time synchronized, wherein events are registered in said at least two data processors, wherein the timing of said events registered in different of said at least two data processors is established according to said time synchronization. According to an advantageous embodiment of the invention, events may be registered and preferably analyzed according to a common timing. This analyzing makes it possible to establish an analysis where events of different wind turbines are basically interrelated and where information regarding such interrelation is important or crucial for establishment of control or fault detection based on correctly timed events from different wind turbines. | 10-21-2010 |
