NORDEX ENERGY GMBH Patent applications |
Patent application number | Title | Published |
20140348654 | WIND TURBINE ROTOR BLADE HAVING AN ELECTRICAL HEATING DEVICE AND A PLURALITY OF LIGHTNING CONDUCTORS - A wind turbine rotor blade includes: a rotor blade root; a rotor blade tip; an electrical heating device; a first lightning receptor disposed in the region of the rotor blade tip; precisely two lightning conductors leading from the lightning receptor to the rotor blade root; a second lightning receptor arranged at a distance to the rotor blade tip and connected to one of the lightning conductors; and, each one of the two lightning conductors being electrically conductively connected to the electrical heating device at a multiplicity of points between the rotor blade root and the rotor blade tip so as to cause equipotential bonding between the two lightning conductors via the electrical heating device in response to a lightning strike to the rotor blade. | 11-27-2014 |
20140112788 | METHOD AND CLEANING PLATE FOR CLEANING A BRAKE OF A WIND TURBINE - The invention is directed to a method for cleaning a brake of a wind turbine. The brake has a brake disc and at least one brake unit, wherein the brake disc and the brake unit can be moved relative to one another via a drive. The method includes fastening a cleaning plate to the brake disc; releasing at least one brake unit; moving the brake disc and the brake unit relative to one another so that the cleaning plate is moved past a brake pad of the brake unit while making applied contact engagement to the brake pad; and, dismounting the cleaning plate from the brake disc. | 04-24-2014 |
20130312900 | METHOD FOR MAKING A WIND TURBINE ROTOR BLADE HALF SHELL OR WIND TURBINE ROTOR BLADE AND PRODUCTION MOLD THEREFOR - A method for waking a wind turbine rotor blade half shell includes arranging a fibrous material in a mold, which has an inner side predetermining an aerodynamic surface of the half shell and has a pinching edge defining the profile of a trailing edge of the half shell. A liquid plastics material surrounding the fibrous material is cured. An insert is arranged in relation to the mold in a predetermined position, in which a surface of the insert and a bordering portion of the inner side of the mold conjointly define an acute angle tapering toward the pinching edge, so that a thinly tapering trailing edge of the half shell is formed between the surface of the insert and the bordering portion. | 11-28-2013 |
20130292885 | METHOD, PREFABRICATED STRUCTURAL ELEMENT AND MOLD FOR MAKING A WIND TURBINE MEMBER - A method for making a wind turbine member wherein a plurality Of components are arranged in a mold. The inner side of the mold determines a surface of the wind turbine member. The components are connected to one another. At least one of the components is a prefabricated structural element which has a fixed geometry with an outer surface. The prefabricated structural element has a positioning projection protruding out of the outer surface and the mold has, on its inner side, a positioning receptacle. The positioning projection is inserted positively into the positioning receptacle to determine the disposition of the prefabricated structural element in the mold. | 11-07-2013 |
20130231209 | Wind Energy Plant - A wind energy plant comprising a gearbox with a gearbox housing, a rotor hub mounted outside of the gearbox and a satellite carrier in the gearbox housing, the satellite carrier having an input side and an output side. At the input side, the satellite carrier is only connected to the rotor hub and mounted in the gearbox housing without a bearing. At the output side, the satellite carrier is mounted in the gearbox housing via a torque bearing arranged in the gearbox housing on the output side of satellite carrier. | 09-05-2013 |
20130177416 | WIND TURBINE AND METHOD FOR OPERATING SAID WIND TURBINE WHEREIN A RISK OF ICING IS DETERMINED ON THE BASIS OF METEOROLOGICAL DATA - A method for operating a wind turbine includes detecting a surface temperature of a component of the wind turbine and determining a risk of icing of the component of the wind turbine. A frost or dew point temperature of the ambient air is determined and a difference between the surface temperature and the frost or dew point temperature is evaluated during the determination of the risk of icing. | 07-11-2013 |
20130170992 | WIND TURBINE ROTOR BLADE HAVING AN ELECTRICAL HEATING ARRANGEMENT AND METHOD OF MAKING THE SAME - A wind turbine rotor blade is assembled from a first and a second rotor blade half shell made of a fiber-reinforced plastics material. An electrical heating arrangement includes a first heating element connected to the first rotor blade half shell and having a blade root end and a blade tip end and a second heating element connected to the second rotor blade half shell also having a blade root end and a blade tip end. The heating arrangement also includes a third heating element connected to the rotor blade half shells and having a blade root end and a blade tip end. The blade tip ends of the first, second and third heating elements are mutually electrically connected. The blade root ends of the first, second and third heating elements are connected to respective electrical connecting lines. | 07-04-2013 |
20130136598 | WIND TURBINE ROTOR BLADE HAVING A HEATING ELEMENT AND A METHOD OF MAKING THE SAME - The invention relates to a wind turbine rotor blade having a blade root, a blade tip, two interconnected rotor blade half shells, which include a fiber-reinforced plastics material, and an electrical heating element, which is arranged on an outer side of the rotor blade and has a blade root end and a blade tip end, wherein the blade tip end is connected via an electrical line leading to the blade root and at least a first segment of the electrical line, which is arranged on an inner side of one of the rotor blade half shells, is made of a carbon fiber material. Further, the present invention relates to a method for making a wind turbine rotor blade having an electrical heating element. | 05-30-2013 |
20130121836 | BLADE CONNECTION FOR A ROTOR BLADE OF A WIND TURBINE - A blade connection for a rotor blade of a wind turbine having a plurality of receptacles which extend in the longitudinal direction of the rotor blade and can each receive a longitudinal bolt and are in contact with a component having an inner thread for the longitudinal bolt. The rotor blade is manufactured from two materials, at least in the region of the blade connection, wherein a first material is a composite material, and a second material is a composite material provided with at least one reinforcement layer made of metal and/or ceramic. The receptacles are composed of the first material and the second material is bonded to the first material. | 05-16-2013 |
20110315670 | APPARATUS FOR HEATING WEATHER MASTS - The invention relates to a device for heating weather masts on wind turbines. The object of the invention is to eliminate the drawbacks of the prior art and to keep the weather masts of a wind turbine free of ice. The device according to the invention for heating a weather mast on a wind turbine is that the weather mast comprises interconnected pipings. In the pipings, there is arranged a heating system which is formed by one or a plurality of electric heating wires. | 12-29-2011 |
20110248686 | METHOD FOR THE OPERATION OF A WIND ENERGY PLANT AT SUDDEN VOLTAGE CHANGES IN THE GRID - A method for the operation of a wind energy plant with a rotor, which transfers a driving moment to a generator via a drive train, wherein the generator provides a pre-settable generator moment acting opposite to the driving moment and is connectable to a grid, characterised in that after a sudden voltage change in the grid, the generator moment is controlled depending from the phase position of a torsional vibration of the drive train. | 10-13-2011 |
20110229332 | Wind Turbine Rotor Blade - Wind turbine rotor blade with a blade tip, a blade root, a leading edge, a trailing edge, a pressure side, a suction side and a cross-section, which changes from the blade tip to the blade root, the longitudinal portion being arranged between the blade root and the middle of the rotor blade, has the following:
| 09-22-2011 |
20110229331 | Wind Turbine Rotor Blade - Wind turbine rotor blade with a longitudinal axis, a blade tip, a blade root, a leading edge, a trailing edge and a cross-section arranged orthogonally to the longitudinal axis and changing from the blade root to the blade tip, is the cross-section being formed at the blade root and in the middle of the rotor blade by an aerodynamic profile, and an imaginary reference plane arranged with respect to the rotor blade which includes the longitudinal axis of the rotor blade, wherein, in a cross-section, an angle α | 09-22-2011 |
20110171022 | WIND TURBINE WITH A YAW SYSTEM AND METHOD FOR THE YAW ADJUSTMENT OF A WIND TURBINE - A wind turbine comprising a tower and a nacelle which is rotatably mounted on the tower and whose alignment is adjustable by means of a yaw system, wherein the yaw system has at least one adjusting drive, a rotatable yaw bearing, at least one brake disk and at least two brake units which can exert a braking torque on the brake disk, wherein the at least one of the brake units has a first brake pad with a first coefficient of friction, and at least one of the brake units has a second brake pad with a second coefficient of friction, wherein the first and the second coefficient of friction are different from each other. | 07-14-2011 |
20110135470 | METHOD FOR OPERATING A VARIABLE-SPEED WIND TURBINE AND THE WIND TURBINE - A method for operating a wind turbine with a variable speed rotor, a control system and a safety system, including the steps of initiating a braking procedure of the rotor of the wind turbine by the control system when the rotational speed of the rotor exceeds a first threshold value (n | 06-09-2011 |
20110126978 | METHOD AND APPARATUS FOR ASSEMBLING A ROTOR BLADE FOR A WIND TURBINE - Method for assembling a rotor blade for a wind turbine, wherein the rotor blade has a first half shell, a second half shell and at least one shear web running in the longitudinal direction of the rotor blade. | 06-02-2011 |
20110095532 | Method for operating a wind power plant having a doubly-fed asynchronous machine and wind power plant having a doubly-fed asynchronous machine - A method for operating a wind energy plant having a doubly-fed asynchronous machine, a grid-sided converter and a generator-sided converter both being controlled by a control means. | 04-28-2011 |
20110008175 | ROTOR BLADE FOR A WIND TURBINE AND METHOD FOR ITS PRODUCTION - A rotor blade for a wind turbine comprising at least one pair of girders lying opposite each other which extend in the longitudinal direction of the rotor blade and carry forces acting on the rotor blade, and at least one shear web which has two front surfaces, each of which is facing one of the two girders, and two lateral surfaces, wherein that shear web extends between the two girders in the longitudinal direction of the rotor blade and is permanently joined to the two girders, wherein at least one connecting profile having a single- or multi-piece cross-section is running in the longitudinal direction of the rotor blade and comprises a collet, into which the at least one shear web is inserted, wherein a first surface of the connecting profile is glued to one of the girders and a second surface of the connecting profile is glued to a lateral surface of the at least one shear web. | 01-13-2011 |
20100320761 | METHOD FOR THE OPERATION OF A WIND TURBINE, AND WIND TURBINE FOR CARRYING OUT THIS METHOD - A method of operating a wind turbine, comprising the steps of measuring a meteorological value and using the measured meteorological value to preset a desired value for the turbine operation, to select an operation condition and/or to determine a boundary condition for the turbine operation, wherein the measured meteorological value is an air mass flow caused by the wind. | 12-23-2010 |
20100303622 | METHOD FOR THE EMERGENCY BRAKING OF A WIND POWER PLANT AND A WIND POWER PLANT WITH A ROTOR BLADE PITCH CONTROL FOR EMERGENCY BRAKING - Method for the emergency braking of a wind power plant, in which at least one rotor blade of the wind power plant is adjusted into its feathering position, wherein a first phase, in which the at least one rotor blade is adjusted with a first speed, and a second phase, in which the at least one rotor blade is adjusted as of a predetermined first blade pitch angle with a second speed, which is increased until a maximum speed is reached and/or until a second determined blade pitch angle is reached. | 12-02-2010 |
20100268393 | WIND FARM WITH PLURAL WIND TURBINES, AND METHOD FOR REGULATING THE ENERGY FEED FROM A WIND FARM - A wind farm with plural wind turbines which are connectible to a farm grid that is in turn connectible to an electricity supply mains via a connection point, wherein the wind farm features the following: a central control system, which determines a correction value for a local desired value for one or plural wind turbines by way of a first regulator, depending on an actual value of an electric variable before or after the connection point, and a turbine control for at least one wind turbine, which determines a local desired value for an electric variable to be generated by the wind turbine by way of a second regulator, depending on an actual value of an electric variable measured in the farm grid, wherein the turbine control determines the sum of the local desired value and the correction value as the total desired value for the electric variable of the wind turbine to be generated. | 10-21-2010 |
20100257811 | ANCHORING ASSEMBLY PART FOR A TOWER OF A WIND TURBINE - An anchoring assembly part for a wind turbine tower, which part is in a ring- or ring segment shape and prefabricated from a concrete material, and which has at least one projecting reinforcement element for the connection with a lower tower portion made of a concrete material, and at least one bore for receiving an anchor bolt for the detachable connection with an upper tower portion made of steel, an anchor sleeve with an internal thread for screwing in the anchor bolt being arranged in said bore. | 10-14-2010 |
20100225113 | METHOD FOR THE OPERATION OF A WIND TURBINE AND WIND TURBINE USING THIS METHOD - A method for the operation of a wind turbine comprising a rotor with at least one rotor blade, a generator and a speed regulator for regulating the rotational speed of a drive train element by adjusting a generator torque and/or a blade pitch angle, comprising the steps of: determining the angular speed of the drive train element through the time derivative of an angular position signal, determining the angular acceleration of the drive train element, presetting desired values for the generator torque and/or the blade pitch angle taking into account the angular speed of the drive train element and the angular acceleration of the drive train element, wherein the angular acceleration of the drive train element is determined from the angular position signal, wherein a filtering with an upper cut off frequency is performed after the first time derivative of the angular position signal and before a second time derivative of the angular position signal, said upper cut off frequency being tuned to a maximum adjustment speed of the generator torque and/or of the blade pitch angle. | 09-09-2010 |
20100215497 | APPARATUS FOR POSITIONING A GEARBOX IN A WIND ENERGY PLANT - An apparatus for positioning a gearbox in a wind energy plant, which gearbox is supported on a bearing structure of the wind energy plant by way of a torque support, wherein the torque support is mounted via at least one uncoupling element, which is arranged between torque support and bearing structure, wherein the torque support features at least one support body and an hydraulic apparatus with at least one hydraulic cylinder, by way of which the position of the support body is adjustable with respect to the bearing structure. | 08-26-2010 |
20100202884 | Device for locking a rotor blade of a wind turbine - A device for locking a rotor blade of a wind turbine which has an adjustment system for the blade pitch angle of the rotor blade, wherein the adjustment system has a drive which features a motor and a gearbox with an input shaft that bears an external toothing, characterised by a locking pin rotatably mounted around its longitudinal axis, which engages with the external toothing in a locking position, and releases the external toothing in an unlocked position, wherein the locking pin has an end portion whose free end stands eccentric to the longitudinal axis of the locking pin. | 08-12-2010 |
20100191384 | METHOD FOR THE OPERATION OF A WIND FARM - A method for the operation of a wind farm having two or more wind energy plants, which has a farm control which presets a desired value for an electric variable of the wind farm which has to be generated, wherein the farm control calculates an average increase of the real values of the electric variable for at least one time interval continuously, and compares it with a maximum value for the increase of the electric variable in the respective time interval, the farm control determines a proposal of a desired value for each predetermined time interval, based on a real value of the electric variable which was averaged continuously over the time interval, and in the case that the average increase in the at least one time interval is smaller than the maximum value in the corresponding time interval, the farm control determines a new desired value of the electric variable of the wind farm, with a selection of the desired value as the smallest of several proposals for a desired value. | 07-29-2010 |
20100124498 | WIND ENERGY PLANT WITH A CENTRAL CONTROL DEVICE AND A CONTROL UNIT IN THE ROTOR AND METHOD FOR THE OPERATION OF SUCH A WIND ENERGY PLANT - A wind energy plant with a nacelle, a rotor, which features at least one rotor blade adjustable in its blade pitch angle, a central control device for controlling the wind energy plant and a control unit disposed in the rotor for controlling the blade pitch angle of the at least one rotor blade, wherein the central control device and the control unit in the rotor can exchange data with each other via a data link, which comprises at least one first sending and receiving device at the nacelle side and at least one second sending and receiving device at the rotor side, wherein a wireless network connection with a safety-oriented communication protocol is provided between the at least one first sending and receiving device and the at least one second sending and receiving device, and that one monitoring- and communication device at a time is associated to the first and/or the second sending and receiving device, which can monitor the function of the sending and receiving device and initiate a predetermined action in the case of an error. | 05-20-2010 |
20100096853 | METHOD FOR THE OPERATION OF A WIND ENERGY PLANT WITH A DOUBLE-FED ASYNCHRONOUS GENERATOR AND WIND ENERGY PLANT WITH A DOUBLE-FED ASYNCHRONOUS GENERATOR - A method for the operation of a wind energy plant with a double-fed asynchronous generator which has a mode of operation as a phase shifter, in which reactive power is fed into the electric power supply grid, the method having the following steps: the stator of the asynchronous generator is short-circuited, the asynchronous generator is run-up to a predetermined rotational speed from a working rotational speed range via a converter after running up, the short-circuit in the stator is cancelled, the double-fed asynchronous generator is synchronised with the electric power supply grid, and it is driven for the generation of reactive power. | 04-22-2010 |
20100052321 | METHOD FOR THE OPERATION OF A WIND ENERGY PLANT HAVING A WIND VELOCITY MEASUREMENT DEVICE - A method for the operation of a wind energy plant, which features a wind velocity measurement device and a device for the detection of a mechanical load, with the following steps: measuring a wind velocity with the wind velocity measurement device, detecting a mechanical load with the device for the detection of a mechanical load, determining an estimated value for the wind velocity, based on the determined mechanical load, comparing the wind velocity measured by means of the wind velocity measurement device with the estimated value. | 03-04-2010 |
20100029399 | ROTOR SHAFT FOR A WIND ENERGY PLANT AND WIND ENERGY PLANT - The invention is related to a rotor shaft for a wind energy plant, wherein the rotor shaft is at least partially hollow, comprising a line pipe, extending in the interior of the rotating rotor shaft and being stationary and accommodating electric lines, a transmission device, arranged at least partially in the rotor shaft, for the electric connection between a stationary nacelle and a rotating rotor of the wind energy plant, wherein the transmission device features a first body, stationary and connected to the line pipe, and a second body rotating with the rotor shaft, and wherein there is an electric sliding contact between the first and the second body, a casing surrounding the transmission device and formed separately from the second body, which is connected to the rotor shaft and/or adapted to be connected to a rotor hub of the wind energy plant, and which rotates with the rotor shaft, and a torque transmitting connection between the casing and the second body of the transmission device. | 02-04-2010 |
20100028153 | METHOD FOR INSTALLING A ROTOR HUB ON A ROTOR SHAFT OF A WIND ENERGY PLANT, AND A WIND ENERGY PLANT - The present invention is related to method for installing a rotor hub on a rotor shaft of a wind energy plant, in which the following steps are consecutively performed: at the end of the rotor shaft ( | 02-04-2010 |
20100026005 | WIND ENERGY PLANT WITH A ROTOR - A wind energy plant with a rotor, which is connected to a gearbox and/or a generator via a rotor shaft, wherein the rotor shaft is bearing mounted on a carrier unit via two taper roller bearings in an O arrangement, characterised in that each taper roller bearing has an inner and an outer race, wherein the inner races and the outer races are secured in their distance to each other in the axial direction with respect to the rotational axis of the rotor shaft via an adjustment device. | 02-04-2010 |
20090309361 | METHOD FOR CONTROLLING A WIND ENERGY PARK - The present invention is related to a method for controlling a wind energy park with plural wind energy plants and plural control units, which perform control tasks in the wind energy park, comprising the following steps:
| 12-17-2009 |
20090309360 | METHOD FOR CONTROLLING A WIND ENERGY PLANT - The present invention is related to a method for controlling a wind energy plant with plural control units, which perform control tasks in the wind energy plant, comprising the following steps:
| 12-17-2009 |
20090261594 | WIND MOTOR WITH A HOLDING DEVICE FOR A ROTOR SHAFT - Wind motor with a drive, the input of which is coupled with a rotor shaft, which has a separate mount, characterized in that a holding device is provided between the mount and the drive, which in its mounted state holds the rotor shaft in a predetermined position. | 10-22-2009 |
20090250931 | METHOD FOR OPERATING A WIND ENERGY PLANT WITH A DOUBLY-FED ASYNCHRONOUS MACHINE AND WIND ENERGY PLANT WITH A DOUBLY-FED ASYNCHRONOUS MACHINE - Method for operating a wind energy plant having a doubly-fed asynchronous machine, a grid-sided converter and a generator-sided converter both being controlled by a control means, the method comprising the following steps: in a regular operating mode the converters are controlled by the control means by means of command variables, in case of fault the converters are controlled by at least one control module which controls the torque and/or the active power and the reactive current and/or the reactive power by means of command variables such that a disconnection of the asynchronous machine from the grid will be performed only if the grid voltage falls below a predetermined voltage-time-characteristic curve, wherein the shape of the voltage-time-characteristic curve is configured by a plurality of pre-selectable parameters in the at least one control module. | 10-08-2009 |
20090232652 | METHOD AND APPARATUS FOR ROTATING A COMPONENT OF A WIND ENERGY PLANT - The invention is related to a method for rotating a component of a wind energy plant by traversing an adjustment device, wherein the adjustment device comprises at least two adjustment drives, each one thereof having at least one electric motor, for traversing the adjustment device, and wherein during the traversing of the adjustment device, the electric motor of at least one of the at least two adjustment drives is operated at another rotational speed than the electric motor of at least one other of the at least two adjustment drives. Furthermore, the invention is related to a corresponding device. | 09-17-2009 |
20090212567 | CONTROLLER FOR A BLADE ADJUSTMENT ANGLE OF AT LEAST ONE ROTOR BLADE OF A WIND POWER PLANT - Controller for a blade adjustment angle for at least one rotor blade of a wind power plant, in which a first controller branch is switched for the determination of the blade adjustment angle depending on the operating states of the wind power plant, wherein at least one differentiating member is provided in the switched first controller branch. | 08-27-2009 |
20090212566 | METHOD FOR OPERATING A WIND ENERGY PLANT AND WIND ENERGY PLANT - The invention relates to a method for operating a wind energy plant, the wind energy plant having a rotor with at least one rotor blade which has an adjustable pitch angle, the wind energy plant having a generator coupled to the rotor, and a regulation means which, if a there is a deviation of the rotation speed of the generator or rotor from a rotation speed set point, adjusts the pitch angle of the at least one rotor blade such that the rotation speed set point is reached again, wherein an electrical quantity provided by the wind energy plant by means of a generator and fed into a grid is reduced to a predetermined value in a short time by a reduction of a preset value for the generator, wherein prior to the regulation means noticing a deviation of the rotation speed of the rotor or generator from the rotation speed set point effected by the reduction of the preset value, an adjustment of the at least one rotor blade to a new pitch angle is initiated, wherein at the new pitch angle the rotation speed of the rotor or the generator reaches the rotation speed set point at the reduced electrical quantity and the current wind speed. In addition, the invention relates to a wind energy plant. | 08-27-2009 |
20090212565 | WIND ENERGY PLANT WITH PITCH CONTROLLER - A wind energy plant having at least one rotor blade with a pitch angle, the pitch angle being adjustable by means of a pitch controller, and a generator converter unit, at least one electrical quantity of the generator converter unit being adjustable by means of a converter controller, wherein the wind energy plant has a power train with a rotor having the at least one rotor blade, the rotor being disposed at a front end of the power train and the power train leading to the generator converter unit, wherein a first rotation speed detection unit is provided at the power train near the front end of the power train and a second rotation speed detection unit is provided at the power train near the generator converter unit, wherein the measured rotation speed n | 08-27-2009 |
20090206605 | METHOD FOR THE OPERATION OF A WIND ENERGY PLANT - A method for the operation of a wind energy plant, with an operation management, which can preset a desired value for an electric variable of the wind energy plant to be generated; a wind measurement device, which can capture the wind direction and the wind velocity, and a control unit, on which the measured values for the wind velocity and the wind direction are present, and in which a maximum value for the turbulence intensity is filed, the following procedural steps proceed in the method: from a turbulence intensity depending on the wind direction, the control unit determines one or more sectors of critical wind directions, in which the turbulence intensity exceeds the maximum value for the turbulence intensity, the control unit generates a control signal for the operation management, in order to reduce the desired value of the electric variable to be generated when the measured wind direction is in a sector of the critical wind directions, and a determined characteristic value exceeds a predetermined maximum value for the characteristic value. | 08-20-2009 |
20090193894 | APPARATUS FOR MONITORING THE ROTATIONAL SPEED IN A WIND ENERGY PLANT - An apparatus for monitoring the rotational speed in a wind energy plant, with a rotor shaft which is driven by the rotor and runs out into a gear unit, and with a generator shaft, which connects an output shaft of the gear unit with a generator/converter unit, characterised by a first rotational speed detection unit on the rotor shaft and a second rotational speed detection unit on the generator shaft, wherein each rotational speed detection unit has at least two rotational speed sensors working independently from each other, an analysing unit for the rotational speed, to which the measured signals of the rotational speed detection units are applied and which generates an error signal for a rotational overspeed when a certain maximum value for the rotational speed is exceeded. | 08-06-2009 |
20090140704 | METHOD FOR THE OPERATION OF A WIND ENERGY PLANT WITH VOLTAGE-DEPENDENT CONTROL OF A REACTIVE ELECTRIC VARIABLE WHICH IS TO BE PROVIDED - A method for the operation of a wind energy plant, with control of a reactive electric variable which is to be provided, wherein a desired value for the reactive electric variable is determined as follows: a first upper and/or a first lower limit value of the grid voltage is defined for the grid voltage, when the real value of the grid voltage exceeds the first upper limit value and/or the real value of the grid voltage falls below the first lower limit value, the desired value of the reactive electric variable is increased or diminished such that the deviation of the real value of the grid voltage from its desired value is counter-acted, wherein the desired value of the reactive electric variable is continuously increased or diminished further over the time, as long as the real value of the grid voltage exceeds the first upper limit value or falls below the first lower limit value. | 06-04-2009 |
20090108690 | APPARATUS FOR THE VENTILATON OF A ROTOR HUB OF A WIND ENERGY PLANT - Apparatus for the ventilation of a rotor hub of a wind energy plant, with a cup-shaped ventilation cap, which has a circumferential side wall and a base portion, wherein the side wall has at least one bore for draining water and the base portion has at least one bore for ventilation, a pipe-shaped connection piece, which has an air entrance opening which runs out into an interior space of the rotor hub, wherein the ventilation cap is arranged before the air entrance opening and the at least one bore for ventilation is arranged in the ventilation cap outside of the air entrance opening of the pipe-shaped connection piece such that the air entrance opening is covered up by the ventilation cap. | 04-30-2009 |
20090081041 | METHOD FOR CONTROLLING A WIND ENERGY PLANT - The present invention is related to a method for controlling a wind energy plant, with a nacelle disposed on a tower and with a rotor with at least one rotor blade, the blade adjustment angle of which can be adjusted by means of a blade adjustment equipment. The objective to provide a reduction of the loads acting on the plant when there is a malfunction of the blade adjustment equipment is resolved according to the present invention in that the function of the blade adjustment equipment is monitored, and when an error of the blade adjustment equipment occurs, the nacelle is rotated from an operating position into a rest position, in which there is a flow of the wind against the surface extended by the at least one rotor blade ( | 03-26-2009 |
20090079192 | Method for controlling and adjusting a wind turbine - A method for controlling and adjusting a wind power installation having a nacelle displaceable by an azimuth angle, at least one rotor blade displaceable about its longitudinal axis and a power supply in a spinning mode, wherein the method comprises the following steps: a control unit determines an angular position for the nacelle from measured values (v) of wind velocity and wind direction and one or more displacement angles for the at least one rotor blade upon a measured wind velocity exceeding a predetermined speed value (v | 03-26-2009 |
20090033313 | METHOD AND APPARATUS FOR DETERMINING A CHARACTERISTIC CURVE FOR AN ELECTRIC VARIABLE OF A WIND ENERGY PLANT - The present invention is related to a method for determining a characteristic curve ( | 02-05-2009 |
20090033097 | WIND PARK WITH A PLURALITY OF WIND ENERGY PLANTS AND METHOD FOR THE OPERATION OF THE WIND PARK - A method for the operation of a wind park with a plurality of wind energy plants, which each one have one control unit at a time, which can control and/or adjust the wind energy plant in response to a received desired value for an electric variable, the method having the following steps: a higher order control calculates and/or receives a currently permitted maximum value for the electric variable which the wind park is allowed to provide, the higher order control determines a desired value for the electric variable for each wind energy plant and forwards the same to the wind energy plants, characterised in that the higher order control determines the desired value for each one of the wind energy plants depending on the currently maximum and/or minimum available values of all the wind energy plants. | 02-05-2009 |
20090033096 | METHOD FOR THE DETERMINATION OF A CONTROL RESERVE AND WIND ENERGY PLANT WITH A CONTROL UNIT FOR THE DETERMINATION OF THE CONTROL RESERVE - A method for the determination of a control reserve of one or plural wind energy plants, for the operation of which a desired value for at least one electric variable is preset, and for which a control unit is provided which has a power curve, which contains a maximum value of the electric variable depending on values of the wind, the method having the following steps: the control unit determines a maximum value of the electric variable from the actual value of the wind and subtracts a current value of the electric variable from the same, the control unit transmits the determined maximum value and/or the difference as a control reserve to a higher order control unit and/or an external utility. | 02-05-2009 |
20090023544 | GEARBOX FOR A WIND ENERGY PLANT - A gearbox for a wind energy plant, with a satellite carrier, which is connected to a rotor shaft or a rotor hub at its input side and which is mounted via a bearing arranged in a gearbox housing, wherein the bearing is arranged in the gearbox housing at the output side of the satellite carrier, and a slew bearing is provided as the bearing for the satellite carrier. | 01-22-2009 |
20090012724 | METHOD AND APPARATUS FOR THE DETERMINATION OF A STRAIN FOR A WIND ENERGY PLANT - A method for the determination of a strain of a wind energy plant ( | 01-08-2009 |
20090005909 | METHOD FOR RUNNING IN A DRIVE TRAIN COMPONENT OF A WIND ENERGY PLANT AND WIND ENERGY PLANT FOR EXECUTING THIS METHOD - A method for running in a drive train component of a wind energy plant, wherein the wind energy plant has an operation management which can control at least one operational variable B significant for the strain of the drive train component to a desired value B | 01-01-2009 |
20090001723 | METHOD FOR STARTING UP A WIND ENERGY PLANT AFTER AN OPERATION STOPPAGE AND WIND ENERGY PLANT WHICH CAN EXECUTE THE METHOD - A method for starting up a wind energy plant after an operation stoppage, wherein the wind energy plant has a gearbox in the drive train and an operation management which can control at least one operational variable significant for the strain of the gearbox B of the wind energy plant to a desired value B | 01-01-2009 |
20090000227 | WIND ENERGY PLANT TOWER - A wind energy plant tower with a tower portion made of a concrete material and a steel-made tubular tower segment, which has on its foot a plurality of connection bores for the connection to the tower portion made of the concrete material, wherein the tower portion made of the concrete material has a head portion with a plurality of openings and a plurality of anchor bolts are provided, which can be fastened after the completion of the tower portion made of the concrete material each at a time in or on one of the connection bores on the foot of the steel-made tower segment and one of the openings in the head portion. | 01-01-2009 |
20080265846 | METHOD FOR THE ACTIVE DAMPING OF THE DRIVE TRAIN IN A WIND ENERGY PLANT - A method for the active damping of a drive train in wind energy plant, with the following steps: the actual value of the generator rotational speed is acquired and amplified via an oscillatory delay element, the oscillatory delay element has a predetermined natural oscillation frequency (ω | 10-30-2008 |
20080256892 | WIND ENERGY PLANT TOWER - A wind energy plant tower with a load-bearing tower wall, which has a circulating outer periphery and consists of a plurality of wall sections, which each one have one centre section and two border sections running in the longitudinal direction of the tower, which are provided with a plurality of connection bores, wherein the surfaces defined by the border sections run along the outer periphery or in a constant distance to the same, and the connection bores are aligned transversely to the outer periphery. | 10-23-2008 |