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NZ316943A - Method of operating a wind power station - Google Patents

Method of operating a wind power station

Info

Publication number
NZ316943A
NZ316943A NZ316943A NZ31694396A NZ316943A NZ 316943 A NZ316943 A NZ 316943A NZ 316943 A NZ316943 A NZ 316943A NZ 31694396 A NZ31694396 A NZ 31694396A NZ 316943 A NZ316943 A NZ 316943A
Authority
NZ
New Zealand
Prior art keywords
wind
speed
wind turbine
rotor
wind speed
Prior art date
Application number
NZ316943A
Inventor
Klaus G Goken
Original Assignee
Wobben Aloys
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7771096&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=NZ316943(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Wobben Aloys filed Critical Wobben Aloys
Publication of NZ316943A publication Critical patent/NZ316943A/en

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
    • 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
    • F03D7/0276—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling rotor speed, e.g. variable speed
    • 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
    • F05B2270/00—Control
    • F05B2270/10—Purpose of the control system
    • F05B2270/109—Purpose of the control system to prolong engine life
    • F05B2270/1095—Purpose of the control system to prolong engine life by limiting mechanical stresses
    • 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
    • F05B2270/30—Control parameters, e.g. input parameters
    • F05B2270/32—Wind speeds
    • 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
    • F05B2270/30—Control parameters, e.g. input parameters
    • F05B2270/32—Wind speeds
    • F05B2270/3201—"cut-off" or "shut-down" wind speed
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Wind Motors (AREA)
  • Control Of Eletrric Generators (AREA)

Description

New Zealand No. International No. 316943 TO BE ENTERED AFTER ACCEPTANCE AND PUBLICATION Priority dates: 01.09.1995; Complete Specification Filed: 29.08.1996 Classification^) F03D7/04 Publication date: 25 November 1998 Journal No.: 1434 NEW ZEALAND PATENTS ACT 1953 COMPLETE SPECIFICATION Title of Invention: Method of operating a wind power station Name, address and nationality of applicant(s) as in international application form: ALOYS WOBBEN, Argestrasse 19, D-26607 Aurich, Germany Aloys Wobben, Argestr. 19, 26607 Aurich Method for operating a wind turbine The invention relates to a method for operating a wind turbine, in particular for limiting the mechanical load on a wind turbine, preferentially a pitch-controlled wind turbine. The invention relates also to an associated wind turbine.
A load is imposed on the rotor blades of a wind turbine by the wind pressure operating on them, which depends in turn on the prevailing wind regime and especially on the wind speed of the prevailing wind. This dependency derives from: where q is the effective wind pressure, p the air density and v initially the incident wind speed at the profile.
The incident wind speed v is comprised vectorally of the actual wind speed vw and the local swept speed vu at a given point on the rotor blade. where n is the rotor speed and rthe rotor radius at the point under consideration. In the event that the actual wind speed vw is vertical to the swept speed vu, i.e. that the prevailing wind blows frontally or axially onto the rotor of the wind turbine, then with the help of Pythagoras' theorem: In the case at issue, it is also necessary to calculate the angle of incidence a , i.e. the angle between the incident wind speed v and the swept speed vu from: The force imposed at the blade profile is determined using the profile polars, namely Here, (2) (3) as: 316943 (5) Fa =<i-A-ca , where FA is the force operating on the blade profile, q the effective wind pressure, A the surface area or reference area of the rotor blade exposed to the wind and ca the profile polar as a function of the angle of incidence a.
In the area of interest in this context, the profile polar ca can be described in an approximately linear form as: ^ ca = const • a , or, for small angles (in radian measure): aivy « vu): tan a » a Therefore, it follows from equation (4) that: ca = const ■ — . vt/ In addition, it follows from equation (5) that: <9> Fa~7 '(v2u+vw)-A-const-— , 1 vu or, by combining the constant elements: Fa = const-(v£ + ■—- . vu Of course, the speed vector of the incident wind vw is not always vertical to the swept speed vu, so equation (3) does not always apply. However, the preceding equations permit at least qualitative dependencies of the various parameters to be identified. 316943 In particular, it can be deduced from equation (1) that the wind pressure q 'mposed as a load on the rotor of the wind turbine is directly proportional to the second power of the incident wind speed v.
The respective wind turbine can therefore reach its maximum load at a certain maximum incident wind speed vmax.
It is known from Robert Gasch: "Windkraftanlagen", B. G. Teubner, Stuttgart, 1993, pp. 303ff and Erich Hau: "Windkraftanlagen", Springer-Verlag, Berlin Heidelberg New York London Paris Tokyo, 1988 p. 323f, pp. 330ff, that the load on a wind turbine can be limited, in the sense of the method of the type cited at the outset, by switching off the wind turbine when a maximum wind speed vwmax is reached. Especially in wind parks, such a cut-off involving all the wind turbines of the wind park being stopped almost simultaneously when the cut-off wind speed is reached, or cut in again when the wind speed drops again after such a cut-off, causes steep power gradients, noticeable from the sudden changes in voltages in the electrical grid to which these wind turbines are connected.
The purpose of the invention is to increase the output of a wind turbine and yet limit the load imposed on the wind turbine at higher wind speeds.
The embodiment of the invention achieves this by reducing the output of the wind turbine once a predefined wind speed has been reached and in proportion to the wind speed, preferentially by reducing the operational rotor speed of the wind turbine rotor when winds exceeding a critical wind or incident wind speed occur.
It can be seen, at least qualitatively, from equations (1), (3) and (10) in the foregoing that the wind pressure imposed on the rotor blade, as well as the force operating on the blade profile and hence acting as a load on the rotor blade, is dependent on the swept speed vu and hence on the operational speed of the rotor. To limit the load on the wind turbine rotor caused by increasing wind speed vw or an unfavourable incident angle (depending on which parameter is taken as the measured variable), which could lead in each case to an unfavourable growth in the resultant incident wind speed v , the increased load is counteracted by reducing the rotational rotor speed, i.e. the swept speed of the rotor.
Unlike previous methods, the benefit of the invention is that it does not involve a complete cut-off of the wind turbine when a critical wind speed is reached, and that this critical wind speed is defined as the cut-off wind speed, but that the wind turbine is forced only to reduce its operational rotor speed as soon as the incident wind speed v exceeds the critical wind speed. Thus, the wind turbine may continue to operate when the wind speed is greater than the normal "cut-off wind speed", thus extending its power curve at higher wind speeds and improving the energy yield and grid compatibility of the wind turbine. In pitch-controlled wind turbines especially, the loads can be favourably limited by the invention through the forced reduction in operational rotor speed. Applying the method of the invention prevents excessive loads on the rotor blades and hence asymmetric, pulsating loads on the entire construction, which increase with rising wind speed.
Methods for reducing the operational rotor speed are sufficiently known for other purposes than those of the present invention. A reduction of the operational rotor speed can be achieved in a pitch-controlled wind turbine by, for example, actively adjusting the pitch angle of each blade. This means that the lift on the rotor btade is influenced by changing the pitch angle or angle of attack of the rotor blade profile, thus achieving a reduction in the rotational rotor speed. By combining this method with a variable-speed drive train, productive operation is made possible, e.g. for driving a pump, or for grid connection via an inverter or similar.
A further embodiment of the method of the present invention reduces the speed of the rotor in such a way that the strength of the load imposed on the wind turbine rotor remains almost constant or is reduced at increasing wind speeds exceeding the critical wind speed. This prevents overloading of the wind turbine's drive train. The power output is throttled back simultaneously when the wind speed increases.
A wind turbine embodying the invention is distinguished by having a device which ensures that the method of the invention is automatically executed.
The drawings contain explanatory particulars about the invention. They show: Fig. 1 a power/rotor speed curve as a function of wind speed for a wind turbine embodying the present invention, Fig. 2 a vector diagram illustrating the incident wind speed at a rotor blade of a wind turbine and Fig. 3 a typical profile polar.
Figure 1 shows the power curve and the rotor speed curve as a function of the wind speed vw for a wind turbine operated in accordance with the invention. 316943 In the figure, the power P and the rotor speed n of the wind turbine are plotted against the wind speed v . The power P should rise relatively quickly until a certain nominal speed is reached, and kept as constant as possible until a critical wind speed vwmax, previously the cut-off wind speed, is reached. If previous methods for operating a wind turbine were applied, the power curve would tail off rapidly when the critical wind speed vwmax is reached, because the wind turbine would be turned off at this point. However, the power curve of a wind turbine embodying the invention, shown in the figure, features an extended power curve section going beyond the critical wind speed vwmax, the previous cut-off wind speed. It can be seen that the power output and the rotor speed is now merely reduced at wind speeds above the previous cut-off wind speed, thus limiting the load imposed on the wind turbine in this wind-speed range yet permitting continued operation of the wind turbine.
Figure 2 shows a vector diagram illustrating the incident wind speed at a wind turbine rotor blade. This figure serves to explain in particular equations (3) - (5) in the introductory part of the specification.
A further illustration of equations (5) - (8) in the introductory part of the specification is provided by Figure 3, which shows a typical polar curve.

Claims (4)

Aloys Wobben, Argestr. 19, 26607 Aurich 316943 New claims 1 to 4
1. Method for operating a pitch-controlled wind turbine, characterised in that the power output of the wind turbine and the operational speed of the rotor is reduced when the cut-off wind speed is reached, e.g. at a wind speed of approximately 25 metres per second, depending on the (further) increase in the wind or incident wind speed.
2. Method according to claim 1, characterised in that the operational rotor speed(s) of the rotor is variably reduced in such a manner that the load imposed on the rotor of the wind turbine at rising wind speeds above the cut-off wind speed remains almost constant or is reduced.
3. Method according to claim 1 or 2, characterised in that the reduction in operational rotor speed is combined with a change in power output based on the amount of load.
4. A pitch-controlled wind turbine characterised by having a device for automatic reduction of power output and operating rotor speed when a wind speed liable to overload the wind turbine is reached, depending on the further increase in the wind or incident wind speed - i.e. the true or relative wind speed. END OF CLAIMS 316943 Summary The invention relates to a method for operating a wind turbine, in particular for limiting the load on a wind turbine, preferentially a pitch-controlled wind turbine. In addition, the invention relates to an associated wind turbine. The purpose of the invention is to increase the output of a wind turbine while limiting the load imposed on the wind turbine at higher wind speeds. The invention achieves this purpose by reducing the power output of the wind turbine once a pre-definable wind speed is reached, preferentially by reducing the operational rotor speed of the rotor of the wind turbine when winds occur with speeds exceeding a critical wind or incident wind speed.
NZ316943A 1995-09-01 1996-08-29 Method of operating a wind power station NZ316943A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19532409A DE19532409B4 (en) 1995-09-01 1995-09-01 Method for operating a wind turbine and an associated wind turbine
PCT/EP1996/003801 WO1997009531A1 (en) 1995-09-01 1996-08-29 Method of operating a wind power station

Publications (1)

Publication Number Publication Date
NZ316943A true NZ316943A (en) 1998-11-25

Family

ID=7771096

Family Applications (1)

Application Number Title Priority Date Filing Date
NZ316943A NZ316943A (en) 1995-09-01 1996-08-29 Method of operating a wind power station

Country Status (9)

Country Link
EP (1) EP0847496B1 (en)
AR (1) AR003482A1 (en)
DE (2) DE19532409B4 (en)
DK (1) DK0847496T3 (en)
ES (1) ES2149494T3 (en)
GR (1) GR3034724T3 (en)
NZ (1) NZ316943A (en)
PT (1) PT847496E (en)
WO (1) WO1997009531A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7101152B2 (en) 2001-06-07 2006-09-05 Aloys Wobben Method for maximizing the energy output of a wind turbine
US7857586B2 (en) 2003-05-23 2010-12-28 Aloys Wobben Method for operating a wind turbine
US9222464B2 (en) 2011-02-23 2015-12-29 Mitsubishi Heavy Industries, Ltd. Controller for wind turbine generator, wind turbine generator, and method of controlling wind turbine generator
US10027266B2 (en) 2011-04-01 2018-07-17 Wobben Properties Gmbh Wind turbine generator system and method for operating a wind turbine generator system
US10063093B2 (en) 2012-03-16 2018-08-28 Wobben Properties Gmbh Method for the control of a wind turbine with no mains support available
US10502185B2 (en) 2015-03-04 2019-12-10 Wobben Properties Gmbh Method for operating a wind turbine
US11193472B2 (en) 2018-01-04 2021-12-07 Wobben Properties Gmbh Operation of a wind power plant during a storm

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DE19532409B4 (en) 1995-09-01 2005-05-12 Wobben, Aloys, Dipl.-Ing. Method for operating a wind turbine and an associated wind turbine
DE19844258A1 (en) 1998-09-26 2000-03-30 Dewind Technik Gmbh Wind turbine
AU779007B2 (en) * 2000-03-08 2004-12-23 Forskningscenter Riso (Riso National Laboratory) A method of operating a turbine
DE10058076C2 (en) 2000-11-23 2003-06-12 Aloys Wobben Method for controlling a wind energy plant
DE10109553B4 (en) * 2001-02-28 2006-03-30 Wobben, Aloys, Dipl.-Ing. Air density dependent power control
DE10134883A1 (en) * 2001-07-18 2003-01-30 Abb Research Ltd Method and device for speed-adjustable power electronic control of a gearless wind turbine
DE10300733B3 (en) 2003-01-11 2004-07-15 Repower Systems Ag Management system for a wind turbine
CN100347442C (en) 2003-08-07 2007-11-07 维斯塔斯风力系统有限公司 Method of controlling wind turbine connected to electric utility grid during malfunction therein, control system, wind turbine and family hereof
DE102004024564B4 (en) 2004-05-18 2006-03-30 Nordex Energy Gmbh Method for controlling and regulating a wind energy plant and wind energy plant
DE102004054608B4 (en) 2004-09-21 2006-06-29 Repower Systems Ag Method for controlling a wind turbine and wind turbine with a rotor
US7298059B2 (en) 2004-12-17 2007-11-20 General Electric Company System and method for operating a wind farm under high wind speed conditions
FI117351B (en) * 2005-01-31 2006-09-15 Winwind Oy Method for wind turbine control
DE102005029000B4 (en) 2005-06-21 2007-04-12 Repower Systems Ag Method and system for regulation of rotational speed of rotor on wind energy unit with generator and energy blade using pitch angle control device and torque control device to determine rotational speed set values
US7476985B2 (en) * 2005-07-22 2009-01-13 Gamesa Innovation & Technology, S.L. Method of operating a wind turbine
DE102005059888C5 (en) * 2005-12-15 2016-03-10 Nordex Energy Gmbh Method for torque and pitch control for a wind turbine depending on the speed
DE102006021982C5 (en) * 2006-05-10 2010-10-07 Repower Systems Ag Staggered wind farm can be switched off
DE102007014863A1 (en) 2007-03-26 2008-10-02 Repower Systems Ag Method for operating a wind energy plant
WO2008131778A2 (en) * 2007-04-30 2008-11-06 Vestas Wind System A/S A method of operating a wind turbine with pitch control, a wind turbine and a cluster of wind turbines
EP2162620B1 (en) 2007-04-30 2014-04-02 Vestas Wind Systems A/S A method of operating a wind turbine and a wind turbine
EP2153063B1 (en) 2007-04-30 2019-02-27 Vestas Wind Systems A/S A method of operating a wind turbine with pitch control
EP1988284B1 (en) 2007-05-03 2018-09-12 Siemens Aktiengesellschaft Method of operating a wind turbine and wind turbine
DE102007035724A1 (en) 2007-07-30 2009-02-05 Joachim Falkenhagen Method for regulating and power guidance of wind energy unit
US7573149B2 (en) 2007-12-06 2009-08-11 General Electric Company System and method for controlling a wind power plant
US7999406B2 (en) * 2008-02-29 2011-08-16 General Electric Company Wind turbine plant high wind derating control
WO2010000648A2 (en) 2008-06-30 2010-01-07 Vestas Wind Systems A/S Power curtailment of wind turbines
US8380357B2 (en) 2009-03-23 2013-02-19 Acciona Windpower, S.A. Wind turbine control
EP2325480A1 (en) 2009-11-24 2011-05-25 Siemens Aktiengesellschaft Method for controlling the operation of a wind turbine and wind turbine load control system
EP2365215B1 (en) * 2010-03-10 2012-12-12 Siemens Aktiengesellschaft Rotational speed control of a wind turbine based on rotor acceleration
CN101832230B (en) * 2010-05-14 2012-08-29 广西银河风力发电有限公司 Method for controlling wind generating set under strong wind
DE102010050956A1 (en) 2010-11-10 2012-05-10 Powerwind Gmbh Wind energy plant operation controlling method, involves performing lowering of rotational speed, which is smaller in comparison to another speed
DE102011077129A1 (en) 2011-06-07 2012-12-13 Aloys Wobben Method for operating a wind energy plant
DE102011081241A1 (en) 2011-08-19 2013-02-21 Repower Systems Se Energy yield loss determination of a wind turbine
DE102011081795A1 (en) * 2011-08-30 2013-02-28 Wobben Properties Gmbh Method for operating a wind energy plant
EP2636893B1 (en) 2012-03-07 2016-08-31 Siemens Aktiengesellschaft Method to control the operation of a wind turbine
US8704393B2 (en) 2012-08-09 2014-04-22 General Electric Company System and method for controlling speed and torque of a wind turbine during post-rated wind speed conditions
US8987929B2 (en) 2012-11-01 2015-03-24 General Electric Company System and method for operating wind farm
US10662924B2 (en) 2013-11-21 2020-05-26 Vestas Wind Systems A/S Rotor blade control for high winds
WO2015085465A1 (en) 2013-12-09 2015-06-18 General Electric Company System and method for reducing oscillation loads of wind turbine
DE102014206884A1 (en) 2014-04-09 2015-10-15 Wobben Properties Gmbh Method for feeding electrical energy by means of a wind energy plant
US10337496B2 (en) 2014-12-01 2019-07-02 General Electric Company System and method for controlling a wind turbine during adverse wind conditions
DE102015119986A1 (en) 2015-11-18 2017-05-18 Wobben Properties Gmbh Control of a wind energy plant with adjustable rotor blades
CN105649876B (en) * 2015-12-31 2018-10-19 北京金风科创风电设备有限公司 Wind turbine control method and device
DE102017121563A1 (en) * 2017-09-18 2019-03-21 Wobben Properties Gmbh Wind energy plant and method for operating a wind energy plant
DK3489507T3 (en) 2017-11-28 2023-07-31 Nordex Energy Se & Co Kg METHOD AND DEVICE FOR OPERATING A WIND ENERGY PLANT
CN108590961A (en) * 2018-04-24 2018-09-28 深圳智润新能源电力勘测设计院有限公司 A kind of pitch control method
CN109404216A (en) * 2018-12-25 2019-03-01 中国大唐集团新能源科学技术研究院有限公司 Improve the control method of Wind turbines strong wind generated energy

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US4792281A (en) * 1986-11-03 1988-12-20 Northern Power Systems, Inc. Wind turbine pitch control hub
DE19532409B4 (en) 1995-09-01 2005-05-12 Wobben, Aloys, Dipl.-Ing. Method for operating a wind turbine and an associated wind turbine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7101152B2 (en) 2001-06-07 2006-09-05 Aloys Wobben Method for maximizing the energy output of a wind turbine
US7484933B2 (en) 2001-06-07 2009-02-03 Aloys Wobben Method for controlling a wind turbine
US7857586B2 (en) 2003-05-23 2010-12-28 Aloys Wobben Method for operating a wind turbine
US8393864B2 (en) 2003-05-23 2013-03-12 Aloys Wobben Method for operating a wind turbine
US9222464B2 (en) 2011-02-23 2015-12-29 Mitsubishi Heavy Industries, Ltd. Controller for wind turbine generator, wind turbine generator, and method of controlling wind turbine generator
US10027266B2 (en) 2011-04-01 2018-07-17 Wobben Properties Gmbh Wind turbine generator system and method for operating a wind turbine generator system
US10063093B2 (en) 2012-03-16 2018-08-28 Wobben Properties Gmbh Method for the control of a wind turbine with no mains support available
US10502185B2 (en) 2015-03-04 2019-12-10 Wobben Properties Gmbh Method for operating a wind turbine
US11193472B2 (en) 2018-01-04 2021-12-07 Wobben Properties Gmbh Operation of a wind power plant during a storm

Also Published As

Publication number Publication date
DE59605723D1 (en) 2000-09-14
AR003482A1 (en) 1998-08-05
EP0847496B1 (en) 2000-08-09
ES2149494T3 (en) 2000-11-01
EP0847496A1 (en) 1998-06-17
GR3034724T3 (en) 2001-01-31
DK0847496T3 (en) 2000-11-06
WO1997009531A1 (en) 1997-03-13
DE19532409A1 (en) 1997-03-06
DE19532409B4 (en) 2005-05-12
PT847496E (en) 2000-11-30
DE59605723C5 (en) 2019-03-28

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