EP2205862A2 - Éolienne à protection accrue contre les surtensions - Google Patents

Éolienne à protection accrue contre les surtensions

Info

Publication number
EP2205862A2
EP2205862A2 EP08839378A EP08839378A EP2205862A2 EP 2205862 A2 EP2205862 A2 EP 2205862A2 EP 08839378 A EP08839378 A EP 08839378A EP 08839378 A EP08839378 A EP 08839378A EP 2205862 A2 EP2205862 A2 EP 2205862A2
Authority
EP
European Patent Office
Prior art keywords
rotor
magnetic field
hub
stator
rotating magnetic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP08839378A
Other languages
German (de)
English (en)
Inventor
Reinhard Vilbrrandt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzion Energy GmbH
Suzlon Energy GmbH
Original Assignee
Suzion Energy GmbH
Suzlon Energy GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Suzion Energy GmbH, Suzlon Energy GmbH filed Critical Suzion Energy GmbH
Publication of EP2205862A2 publication Critical patent/EP2205862A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D7/00—Controlling wind motors 
    • F03D7/02—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor
    • F03D7/04—Automatic control; Regulation
    • F03D7/042—Automatic control; Regulation by means of an electrical or electronic controller
    • F03D7/047—Automatic control; Regulation by means of an electrical or electronic controller characterised by the controller architecture, e.g. multiple processors or data communications
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D7/00—Controlling wind motors 
    • F03D7/02—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor
    • F03D7/022—Adjusting aerodynamic properties of the blades
    • F03D7/0224—Adjusting blade pitch
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/20—Wind motors characterised by the driven apparatus
    • F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/04—Control effected upon non-electric prime mover and dependent upon electric output value of the generator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2220/00—Application
    • F05B2220/70—Application in combination with
    • F05B2220/706—Application in combination with an electrical generator
    • F05B2220/7066—Application in combination with an electrical generator via a direct connection, i.e. a gearless transmission
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2220/00—Application
    • F05B2220/70—Application in combination with
    • F05B2220/706—Application in combination with an electrical generator
    • F05B2220/7068—Application in combination with an electrical generator equipped with permanent magnets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/70—Adjusting of angle of incidence or attack of rotating blades
    • F05B2260/76—Adjusting of angle of incidence or attack of rotating blades the adjusting mechanism using auxiliary power sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2270/00—Control
    • F05B2270/10—Purpose of the control system
    • F05B2270/107—Purpose of the control system to cope with emergencies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Definitions

  • the invention relates to wind turbines with a rotatably mounted on a nacelle rotor, which comprises a hub, wherein the rotor has at least one electrically drivable adjusting device for adjusting the angle of attack at least one attachable to the hub or fixed rotor blade and is connected to a rotor, which with a Stator together forms a generator for powering the adjustment.
  • the present invention relates to a method for generating electrical energy with the wind turbines according to the invention.
  • a separate adjustment drive is provided for each rotor blade of a wind turbine.
  • an emergency operating device for the adjustment of the rotor blades in a reliable position (for example, flag position) is usually provided.
  • the note energy is provided electrically, hydraulically or mechanically.
  • a conventional electric pitch drive is described in DE 103 35 575 B4.
  • the pitch adjustment is based on three-phase motors and frequency converters (servo drives).
  • the frequency converters are powered by three-phase current and provide a DC link via rectifier. From this inverter are then fed to control the three-phase motors.
  • an electrical energy storage which feeds the DC link.
  • the energy storage can be realized by accumulators or capacitors.
  • hydraulic systems In addition to electrical pitch adjustment systems, hydraulic systems, e.g. from DE 101 46 968 A1.
  • the system consists of a hydraulic pump with electric pump drive, a pressure accumulator, a control arrangement and a hydraulic cylinder. By suitable control via the control arrangement and the pressure medium supply of the hydraulic cylinder, the angle of attack of the rotor blades is adjusted.
  • auxiliary generators for the provision of auxiliary energy in the hub.
  • the auxiliary generator is mounted in the rotor shaft so that its rotor has a rotating field winding and is integrated in the shaft, and the stator is fixedly constructed from permanent magnets or field windings.
  • the outer stator can also be rotatably arranged to the relative To vary the rotational speed between rotor and stator (permanent magnet) and so to be able to change the electrical power.
  • the electrical power can also be adjusted via suitable control of the exciter voltage and frequency in exciter windings.
  • the protective function consists in the channeled dissipation of currents due to overvoltages.
  • the object of the present invention is to improve a wind turbine and a method for generating electrical energy with the wind turbine so that the likelihood of deterioration of the Blattverstellsystems in the hub by overvoltages from the nacelle or by lightning over the leaves is greatly reduced.
  • a wind energy plant with a rotor rotatably mounted on a nacelle which comprises a hub, wherein the rotor has at least one electrically drivable adjusting device for adjusting the angle of attack of at least one rotor blade which can be fastened or fastened to the hub and is connected to a rotor. which together with a stator forms a generator for supplying power to the adjusting device.
  • the stator is set up in this way and designed so that a rotating magnetic field can be generated with it relative to the rotor resting relative to the nacelle. That is, the rotor comprises a hub formed as an extra machine element, which is fixedly connected to the rotor.
  • the rotor is connected to a rotor, which includes the structural embodiment of a fixed connection between rotor and rotor or also includes the embodiment that the rotor is an integral part of the rotor.
  • An essential feature of the connection of rotor and rotor is that the rotor is arranged substantially non-rotatably on the rotor.
  • the rotor and the stator together form the auxiliary generator, that is to say that the stator mentioned here does not serve as the counterpart to the rotor of the wind energy plant for producing the energy to be fed into the network, but merely for the generation of energy for the operation of the adjusting devices and optionally further auxiliary devices on Rotor.
  • the rotor of the auxiliary generator is electrically connected to the adjusting device. This is preferably an electrically drivable adjusting device, wherein it may include, for example, an electric motor or an electrically operated pump for example, a hydraulic motor.
  • the rotor of the wind power plant only comprises an adjusting device for adjusting a plurality of rotor blades
  • the rotor has gearboxes for moving the blades.
  • the stator is connected to a power source for generating the rotating energy field.
  • the power supply of the adjusting device is thus galvanically isolated from the nacelle, so that overvoltage protection e.g. guaranteed at lightning strike.
  • the rotating magnetic field of the stator induces a current flow in the rotor, in particular in the case of a stationary rotor, for example in weak wind conditions or a rotor blade position, which can be used to actuate the adjusting devices. It can thus be changed at standstill of the rotor, the angle of attack of the rotor blades, so as to suspend these wind forces and initiate a wind-generated torque in the rotor.
  • a rotating magnetic field can be formed, either by rotation of the magnetic field caused by the stator, or at a stationary stator magnetic field by relative rotation of the rotor in relation to the stator causes.
  • the stator and any permanent magnets provided thereon are at rest with respect to the nacelle and current is induced in the auxiliary generator by the relative movement between rotor and stator.
  • This variant of the auxiliary generator operation should be used in particular if, for example, the rotor blade position is to be reduced if the wind is too strong.
  • the rotating magnetic field can be realized with current-flowing conductors in the form of windings on the stator, wherein the conductors are arranged such that they generate a rotating magnetic field when supplied with alternating or three-phase current.
  • the rotating magnetic field can be realized by at least one rotatably arranged, motor-driven permanent magnet.
  • the permanent magnet can be rotatably arranged on the stator or it can be provided that the stator, which comprises the permanent magnet, is itself rotatably mounted.
  • the stator should be designed such that the rotational speed of the rotating magnetic field is adjustable.
  • This can be realized with alternating or three-phase application by a frequency controller.
  • the rotational speed can be adjusted by a control unit for influencing the rotational speed of the drive motor for driving the permanent magnet.
  • the present invention is particularly suitable for solving the problem when the wind turbine has a device for protecting the conductors from overvoltage and a galvanic separation of the current-carrying parts the adjusting device is designed in relation to the rotor.
  • the wind turbine comprises a non-rotor disposed on the central control, wherein the adjusting device is arranged for receiving and processing wirelessly transmitted signals and the wind turbine comprises at least one signal transmission unit for wireless transmission of the signals of the central control to the adjustment.
  • radio interfaces should be arranged on the central control and the adjusting device.
  • the hub is designed as a Faraday cage.
  • the wind power plant may comprise an emergency power supply device in an advantageous embodiment in the nacelle and / or the hub.
  • According to the invention is further a method for generating electrical energy from wind energy by means of a wind turbine with wind power drivable rotor with rotor blades whose pitch are adjustable with at least one electrically driven adjusting device for influencing the rotational speed of the rotor, wherein the rotor is connected to a rotor, and Runner together with the stator trains a generator, provided.
  • a magnetic field rotating in relation to the rotor is generated by the stator, which induces a current flow rotor for actuating the adjusting device in cooperation with the rotor, which is stationary in relation to the nacelle.
  • the method is carried out during operation of the wind power plant for power generation, whereby change with the aid of adjusting the angle of attack of the rotor blades.
  • the described method according to the invention can be carried out with the device according to the invention shown here.
  • the method relates in particular to the power supply of the adjusting device with respect to the nacelle stationary rotor, which means the situation that there is no rotation of the rotor and not a structural design, the one Rotation of the rotor in relation to the nacelle excludes.
  • the rotating magnetic field can be realized by energizing conductors in the form of windings on the stator with alternating or three-phase current.
  • the rotating magnetic field can be realized by at least one rotatably arranged, motor-driven permanent magnet.
  • the rotational speed of the rotating magnetic field is changed during the rotation.
  • signals for actuating the adjusting device are transmitted to them wirelessly in order to ensure complete galvanic separation between the rotor and the nacelle.
  • the inventive method is particularly advantageous in that the rotating magnetic field is generated at standstill of the rotor for current induction for actuating the adjustment. It can thus be employed in particular at 0 ° angle of attack of the rotor blades (feathering of the rotor blades) for the purpose of stopping the rotor and thus the stoppage of the rotor at the desired restart of the wind turbine by means of the adjustment at an angle.
  • the adjusting device must be supplied with energy, for which purpose the rotating magnetic field generated by the stator can induce a current in the rotor even when the rotor is at a standstill.
  • the entire communication between the fixed area of the wind turbine (tower and nacelle) and the rotatable area (hub) should take place via suitable wireless transmission channels.
  • transmitting and receiving units are provided in the hub and in the nacelle and / or tower.
  • wireless connections can be realized via known systems such as Bluetooth (IEEE 802.15.1), WLAN (IEEE 802.11), ZigBee (IEEE 802.15.4) or Wireless FireWire (IEEE 802.15.3).
  • radio standards can be used, which will be published in the future. It would also be possible to design your own radio interface, the effort is estimated to be high. Digital radio interfaces are due to the lower However, a susceptibility to interference and the better implementation in the control and sensor technology preferable, but it is also an analog radio link conceivable.
  • other methods for the wireless transmission of data such as an infrared interface can be used.
  • a suitable implementation form provides microcontrollers for the individual pitch adjustment systems and the control of the wind energy plant. Instead of microcontrollers, adequate controls based on PLC, computer technology or others can be used.
  • the control center and the distributed pitch control systems have radio interfaces for communication. Each blade adjustment should be able to communicate at least with the central control. In other designs also a central radio interface for all Blattverstellsysteme or the communication of Blattverstellsysteme among themselves via the radio interfaces is conceivable.
  • Ambient sensors temperature, air pressure, humidity, etc.
  • blade pitch sensors angular position, pitch
  • general-purpose sensors rotor speed
  • sensors or sensor groups either have their own radio interfaces, or are connected in a preferred embodiment with the control of a respective sheet system and thus accessible via the radio interface for the central controller and the other Blattverstellsysteme.
  • control specifications and the status messages are transmitted via the bidirectional radio interface between the central controller and the pitch adjustment systems.
  • antennas are generally used. These are to be selected so that the transmission of the signals can be done without interference or poor.
  • the antennas are either mounted inside the nacelle and inside the hub or mounted in a further design via cable extensions on the outside of the nacelle and hub. In this way, radio-interference shields, in particular the hub can be bypassed.
  • the wireless data transmission between the central controller and hub takes place optically. For this purpose, for example, infrared interfaces are arranged.
  • the emergency energy supply in the event of a power failure or other serious fault is housed in the nacelle or hub.
  • the emergency power supply may e.g. continue to maintain a rotating magnetic field over the excitation windings of the auxiliary generators, thus ensuring the supply of electrical power in the hub. It is also possible to arrange an emergency power supply in the hub. The advantage is then the separate supply of the individual Blattverstellsysteme for the greatest possible reliability. In a further design, emergency power supplies in the nacelle and in the hub can also be provided for a redundant design.
  • the hub is designed as a Faraday cage.
  • the metal hub is designed as spherical as possible. Lug openings for blade attachment and maintenance gates are closed by suitable grid or sheet metal structures to complete the cage. All components in the hub are galvanically isolated to the hub and thus attached to the Faraday cage. This avoids the risk of dissipation of lightning or faulty overvoltages via safety-relevant components of the blade adjustment.
  • the protective insulation is converted by suitable fastening materials in conjunction with insulation distances or air gaps.
  • Fig. 1 shows operating parts of nacelle and rotor of a wind turbine according to the invention. It is to be understood as an implementation possibility of various designs and embodiments.
  • Fig. 2 shows the hub structure according to the invention as a Faraday cage with the additionally insulated electrical components.
  • a rotor 1 shows a rotor 1 and essential components of the nacelle 2 of a wind energy plant. It is a hub 3 with adjustable blades 4 shown.
  • the rotor blades 4 are rotatably mounted in a bearing 5 and can be adjusted about the axis of rotation 6 in the direction of rotation 7.
  • the rotor blades 4 are exemplified by an electric motor 8 and a respective gear 9 rotatable.
  • a drive for a plurality of rotor blades 4 or a plurality of drives for a rotor blade 4 can also be used for a rotor blade 4; these alternatives have not been illustrated.
  • the electric motors 8 are fed and controlled by converters 10.
  • the intermediate circuits of the inverter 10 are supported by electrical energy storage device 11 and allow safe positioning of the rotor blades 4 in the flag position 12 (shown in phantom).
  • energy storage 11 the use of different types of accumulators and capacitors is known.
  • Fig. 1 further components of the hub 3 are listed. These include sensor systems 13, one or more radio interfaces 14 and a central communication unit 15. Sensor systems 13 can be connected directly to controlling converter 10 and thereby one or more adjustment systems are available, in the drawing, this alternative embodiment is not shown. Additional sensor systems 13 may be coupled to a central communication unit 15 for access by the central controller ZS or may have their own communication interfaces (not shown). The communication unit 15 bundles and manages the Communication of the hub components with the central control ZS. The data transmission takes place via the radio interface 14. In a further design, not shown, the components may also each have their own radio interfaces. The connection 16 of the individual hub components can be made via cables, radio interfaces or other suitable transmission paths.
  • the hub is connected to a rotor shaft 17, which is designed in Fig. 1 as a horizontal hollow shaft.
  • the shaft is rotatably supported by a bearing 18.
  • the bearings are firmly connected to the support system 19.
  • the rotor shaft 17 is connected to the main generator G.
  • An auxiliary generator HG is mounted in the hollow shaft and generates electrical power in the Generator212. Transformer operation.
  • the electrical connection to the hub components is made by electrical lines 21, which rotate as well as hub 3 and auxiliary generator HG with the rotor system 1 and thus make the use of slip rings unnecessary. The galvanic separation is guaranteed.
  • the excitation system 22 for generating a magnetic field for the auxiliary generator HG may consist of permanent magnets or field windings.
  • the excitation system 22 may be a rotatably mounted permanent magnet and ensure self-rotation, the power supply even when the rotor 1.
  • electrical power can be supplied via the auxiliary generator HG by means of rotation of the magnetic field generated in the windings via a suitable circuit / controller 23, for example by the central control system ZS in generator operation or at standstill in transformer operation Hub 3 are transmitted.
  • the rotor blades can be adjusted by means of the adjusting device 9 ' in order to introduce a torque into the rotor and to drive the rotor.
  • the central control system ZS takes over in a preferred embodiment, the control of the components in the nacelle and in the hub 3. It would be possible also a decentralized control, not shown.
  • the central controller ZS is bidirectionally connected via a radio interface 24 or another non-wired interface and the analog interface 14 in the hub 3 with the sensor systems 13 and the motor controls 10 for the pitch adjustment.
  • a central communication unit 15 in the hub 3 is used.
  • the electrically and electromagnetically shielded hub 3 is shown by implementation as a Faraday cage together with the galvanic decoupling of the electrical components.
  • the inventive protection against overvoltages and their consequences is implemented by a galvanic protective insulation IS of all electrical components and the design of the hub 3 as Faraday cage by a metallic outer screen AS.
  • the central controller ZS records the characteristics of the generated electrical energy, the requirements of the grid operator, the environmental conditions such as the wind strength and direction and operating conditions and possible errors of the subsystems and components. In the following, only the possibility of controlling and regulating by adjusting the rotor blades 4 will be discussed.
  • the central control ZS records the wind speed, the rotor speed and the position of the blades. Depending on the control requirement (limitation of the speed or optimal utilization of the wind energy), setpoint values for the blade positions are determined. Via the bidirectional wireless connection 14 and 24 of the central control ZS and the communication unit 15 in the hub 3, the sensor data (actual value position of the blade) are transmitted permanently and the setpoint values are transmitted as required.
  • the blade adjustment is then performed by the inverter 10.
  • the power for adjustment, sensors and communication in the hub is provided by the auxiliary generator HG in the manner described.
  • the central controller ZS monitors any errors that may occur or critical operating conditions. Error messages for components in the hub are transmitted via the wireless connection 14 and 24 to the central controller ZS. In the event of serious errors, emergency braking may be necessary, with other errors controlled braking may be necessary until the system is at a standstill. As a rule, the wind energy plant is slowed down by adjusting the blades 4 into the feathering position 12. Plants with two or more rotor blades 4 generally have their own adjusting devices for safety reasons; if one system fails, the remaining blades 4 can be brought into the feathering position 12 and can thus bring the plant to a standstill or at least protect against overspeed.
  • the central controller ZS can detect the failure of the mains voltage and leave the pitch in the hub 3 by a setpoint specification of the leaf position in flag position 12.
  • Gearbox 'Adjustment device 0 Inverter 1 Energy storage 2 Flag position 3 Sensor systems
  • Radio interface 5 Communication unit 6 Connection 7 Rotor shaft 8 Mounting 9 Supporting system 0 Gearbox 1 Electrical cables 2 Exciter system 3 Wiring / control

Abstract

L'invention concerne une éolienne et un procédé de production d'électricité au moyen de cette éolienne à partir de l'énergie éolienne. Ladite éolienne comprend un rotor qui peut être entraîné par l'énergie éolienne, ce rotor étant pourvu de pales dont l'angle d'incidence peut être réglé au moyen d'au moins un dispositif de réglage à commande électrique pour agir sur la vitesse de rotation du rotor. Un induit est relié au rotor, cet induit formant avec un stator une génératrice. Le stator génère un champ magnétique qui tourne par rapport à l'induit, ce champ magnétique coopérant avec l'induit, qui est fixe par rapport à la nacelle, pour induire un flux de courant dans l'induit de manière à actionner le dispositif de réglage.
EP08839378A 2007-10-15 2008-10-14 Éolienne à protection accrue contre les surtensions Withdrawn EP2205862A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007049592 2007-10-15
PCT/EP2008/063774 WO2009050157A2 (fr) 2007-10-15 2008-10-14 Éolienne à protection accrue contre les surtensions

Publications (1)

Publication Number Publication Date
EP2205862A2 true EP2205862A2 (fr) 2010-07-14

Family

ID=40567848

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08839378A Withdrawn EP2205862A2 (fr) 2007-10-15 2008-10-14 Éolienne à protection accrue contre les surtensions

Country Status (5)

Country Link
US (1) US20100259045A1 (fr)
EP (1) EP2205862A2 (fr)
CN (1) CN101821498A (fr)
AU (1) AU2008313747A1 (fr)
WO (1) WO2009050157A2 (fr)

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WO2009050157A3 (fr) 2009-12-03
CN101821498A (zh) 2010-09-01
AU2008313747A1 (en) 2009-04-23
US20100259045A1 (en) 2010-10-14

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