DK200900656A - Pitch af vinger på et vindenergianlæg - Google Patents

Pitch af vinger på et vindenergianlæg Download PDF

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Publication number
DK200900656A
DK200900656A DK200900656A DKPA200900656A DK200900656A DK 200900656 A DK200900656 A DK 200900656A DK 200900656 A DK200900656 A DK 200900656A DK PA200900656 A DKPA200900656 A DK PA200900656A DK 200900656 A DK200900656 A DK 200900656A
Authority
DK
Denmark
Prior art keywords
blade
pitch
power plant
wind
wind power
Prior art date
Application number
DK200900656A
Other languages
English (en)
Inventor
Soerensen Tommy
Original Assignee
Lm Glasfiber As
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 Lm Glasfiber As filed Critical Lm Glasfiber As
Priority to DKPA200900656A priority Critical patent/DK178667B1/da
Publication of DK200900656A publication Critical patent/DK200900656A/da
Application granted granted Critical
Publication of DK178667B1 publication Critical patent/DK178667B1/da

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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
    • 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
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06—Rotors
    • F03D1/065—Rotors characterised by their construction elements
    • F03D1/0658—Arrangements for fixing wind-engaging parts to a hub
    • 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
    • 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
    • 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
    • F03D7/0236—Adjusting aerodynamic properties of the blades by changing the active surface of the wind engaging parts, e.g. reefing or furling
    • 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
    • F03D7/0244—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor for braking
    • 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
    • F03D7/028—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling wind motor output power
    • F03D7/0288—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling wind motor output power in relation to clearance between the blade and the tower, i.e. preventing tower strike
    • 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
    • F05B2250/00—Geometry
    • F05B2250/10—Geometry two-dimensional
    • F05B2250/14—Geometry two-dimensional elliptical
    • 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
    • F05B2250/00—Geometry
    • F05B2250/30—Arrangement of components
    • F05B2250/31—Arrangement of components according to the direction of their main axis or their axis of rotation
    • F05B2250/314—Arrangement of components according to the direction of their main axis or their axis of rotation the axes being inclined in relation to each other
    • 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
    • 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
    • F05B2260/74—Adjusting of angle of incidence or attack of rotating blades by turning around an axis perpendicular the rotor centre line
    • 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
    • F05B2270/17—Purpose of the control system to avoid excessive deflection of the blades
    • 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
    • F05B2270/33—Proximity of blade to tower
    • 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)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Wind Motors (AREA)

Claims (17)

1. En vinge (202) til et vindenergianlæg, hvilken vinge omfatter et cirkulært pitch-leje (403) med en pitch-akse (212), der er vinklet i forhold til vingens (202) længdeakse (211), hvilken vinge er kendetegnet ved at omfatte en rod-del (402) med et tilnærmelsesvist elliptisk tværsnit tilnærmelsesvist vinkelret på vingens (202) længdeakse (211), i hvilken rod-del (402) det cirkulære pitch-leje (403) er placeret, når tværsnittet er tilnærmelsesvist elliptisk.
2. En vinge (202) ifølge krav 1, hvor pitch-lejet (403) er placeret et stykke nede af vingen (202), således at kun den yderste de! af vingen (202) pitches.
3. Et vindenergianlæg omfattende et tårn og en rotor (401) med et antal vinger (202), hvoraf mindst en pitch-regulerbar vinge (202) er monteret drejeligt i et pitch-leje (403), hvilket vindenergianlæg er kendetegnet ved, at mindst en vinges (202) længdeakse (212) er vinklet i forhold til dens pitch-akse (212), således at afstanden mellem den yderste del af vingen og tårnet øges, når vingens (202) forkant (305) pitches op imod vinden.
4. Et vindenergianlæg ifølge krav 3 kendetegnet ved, at mindst en vinges (202) pitch-akse (212) er vinklet ud af rotorplanet.
5. Et vindenergianlæg ifølge et eller flere af kravene 3-4 kendetegnet ved, at den mindst ene vinges (202) pitch-akse (212) er vinklet i en vinkel modsat omdrejningsretningen ΐ forhold til vingens længdeakse (211).
6. Et vindenergianlæg ifølge et eller flere af kravene 3-5 kendetegnet ved at omfatte en vinge (202), som beskrevet ved et eller flere af kravene 1-2.
7. Et vindenergianlæg ifølge et eller flere af kravene 3-6 kendetegnet ved at omfatte en eller flere vindhastighedsmålere til måling af vindens hastighed, hvilken vindhastighed benyttes til styring af mindst en vinges (202) pitch.
8. Et vindenergianlæg ifølge et eller flere af kravene 3-7 kendetegnet ved yderligere at omfatte en eller flere positionsmålere til måling af mindst en vinges (202) position, hvilken position benyttes til styring af mindst en vinges (202) pitch.
9. Et vindenergianlæg ifølge et eller flere af kravene 3-8 kendetegnet ved yderligere at omfatte en eller flere afstandsmålere til måling af mindst en vinges (202) afstand til tårnet, hvilken afstand benyttes til styring af mindst en vinges (202) pitch.
10. En metode til styring af et vindenergianlæg kendetegnet ved at omfatte, at vindenergianlæggets rotorareal øges under driften ved at regulere vingens (202) pitch om dens pitch-akse (212), som er vinklet i forhold til vingens (202) længdeakse (211).
11. En metode til styring af et vindenergianlæg kendetegnet ved at omfatte at afstanden mellem den yderste del af mindst en vinge (202) og tårnet øges under driften ved at regulere vingens pitch (212) om pitch-aksen, som er vinklet i forhold til vingens (202) længdeakse (211).
12. En metode til styring ifølge et eller flere af kravene 10-11 kendetegnet ved at omfatte anvendelse af vindens hastighed til regulering af mindst en vinges (202) pitch.
13. En metode til styring ifølge et eller flere af kravene 10-12 kendetegnet ved, at hver vinge (202) pitches individuelt.
14. En metode til styring ifølge et eller flere af kravene 10-13 kendetegnet ved, at mindst en vinges (202) pitch ændres cyklisk.
15. En metode til styring ifølge et eller flere af kravene 10-14 kendetegnet ved, at mindst en vinges (202) pitch ændres mellem -10 og +30 grader.
16. Anvendelse af pitchning af mindst en vinge (202) på et vindenergianlæg til at styre/regulere afstanden mellem den yderste del af mindst en vinge (202) og tårnet.
17. Anvendelse af pitchning af mindst en vinge (202) på et vindenergianlæg til at styre/regulere vindenergianlæggets rotorareal.
DKPA200900656A 2006-11-27 2009-05-27 Pitch af vinger på et vindenergianlæg DK178667B1 (da)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DKPA200900656A DK178667B1 (da) 2006-11-27 2009-05-27 Pitch af vinger på et vindenergianlæg

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DKPA200601554 2006-11-27
DK200601554 2006-11-27
PCT/DK2007/000521 WO2008064678A2 (en) 2006-11-27 2007-11-27 Pitch of blades on a wind power plant
DKPA200900656A DK178667B1 (da) 2006-11-27 2009-05-27 Pitch af vinger på et vindenergianlæg
DK200900656 2009-05-27

Publications (2)

Publication Number Publication Date
DK200900656A true DK200900656A (da) 2009-05-27
DK178667B1 DK178667B1 (da) 2016-10-24

Family

ID=39276257

Family Applications (1)

Application Number Title Priority Date Filing Date
DKPA200900656A DK178667B1 (da) 2006-11-27 2009-05-27 Pitch af vinger på et vindenergianlæg

Country Status (5)

Country Link
US (1) US8267651B2 (da)
CN (1) CN101600879B (da)
DK (1) DK178667B1 (da)
GB (1) GB2456716B (da)
WO (1) WO2008064678A2 (da)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2002476C2 (en) * 2009-02-02 2010-08-03 Univ Delft Tech WIND TURBINE.
ES2379618B1 (es) * 2009-12-16 2013-03-26 Acciona Windpower, S.A. Rodamiento de pala de aerogenerador y aerogenerador que hace uso del mismo.
US8277184B2 (en) 2010-04-22 2012-10-02 General Electric Company Tilt adjustment system
US8029241B2 (en) * 2010-09-15 2011-10-04 General Electric Company Wind turbine rotor blade with aerodynamic winglet
DE102011050777A1 (de) * 2011-05-31 2012-12-06 Dewind Europe Gmbh Rotor und Rotorblatt für eine Windkraftanlage
US20130045098A1 (en) * 2011-08-18 2013-02-21 Clipper Windpower, Llc Cyclic Pitch Control System for Wind Turbine Blades
JP2013221404A (ja) * 2012-04-12 2013-10-28 Yaskawa Electric Corp 発電装置および発電システム
US9074581B2 (en) 2012-06-12 2015-07-07 General Electric Company Cone angle insert for wind turbine rotor
US9109578B2 (en) 2012-06-12 2015-08-18 General Electric Company Root extender for a wind turbine rotor blade
DK2679805T3 (da) * 2012-06-29 2015-03-23 Gen Electric Keglevinkelindsats til vindmøllerotor
DE102012222323A1 (de) * 2012-12-05 2014-06-05 Wobben Properties Gmbh Windenergieanlage sowie Verfahren zum Betreiben einer Windenergieanlage
WO2014185758A1 (ru) * 2013-05-17 2014-11-20 Shaikenov Blok Ветроколесо (с двумя вариантами)
ES2551659B1 (es) * 2014-05-20 2016-09-14 Acciona Windpower, S.A. Método de control de un aerogenerador
DE102016208051A1 (de) * 2016-05-10 2017-11-16 Wobben Properties Gmbh Windenergieanlagen-Rotorblatt, und Windenergieanlage mit selbigem
CN106194580A (zh) * 2016-07-13 2016-12-07 广东明阳风电产业集团有限公司 一种风力发电机组的推力消减控制算法
ES2746862T3 (es) 2017-02-14 2020-03-09 Blok Shaikenov Rueda eólica con curva de codo de pala
FR3100563B1 (fr) * 2019-09-06 2021-08-06 Safran Aircraft Engines Moyeu polysphérique de turbomachine pour pales à calage variable
WO2021069399A1 (en) * 2019-10-07 2021-04-15 Vestas Offshore Wind A/S An improved method for the manufacture of wind turbine blades
CN112610411B (zh) * 2020-12-22 2021-11-23 明阳智慧能源集团股份公司 一种解决风力发电机组塔架净空问题的控制方法与模块
CN113294285B (zh) * 2021-03-31 2022-09-23 江苏金风科技有限公司 叶片以及风力发电机组
CN117846873A (zh) * 2024-01-31 2024-04-09 王金刚 一种风电变桨装置

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2655026C2 (de) * 1976-12-04 1979-01-18 Ulrich Prof. Dr.-Ing. 7312 Kirchheim Huetter Windenergiekonverter
US4439108A (en) * 1982-06-08 1984-03-27 Richard Will Windmill having centrifically feathered rotors to control rotor speed
US6582196B1 (en) 1997-09-04 2003-06-24 Lm Glassfiber A/S Windmill rotor and wind blades therefor
US6619918B1 (en) * 1999-11-03 2003-09-16 Vestas Wind Systems A/S Method of controlling the operation of a wind turbine and wind turbine for use in said method
DE19963252A1 (de) * 1999-12-17 2001-07-12 Lutz Schulze Längsachsial verändertes Rotorblatt zur Erhöhung der Rotorleistung für HA-Windturbinen
NL1014719C2 (nl) * 2000-03-22 2001-09-25 Aerpac Holding B V Windturbine met asymmetrische rotor en rotor.
DE10201726B4 (de) * 2002-01-18 2004-10-21 Wobben, Aloys, Dipl.-Ing. Windenergieanlage
CN2546647Y (zh) * 2002-03-28 2003-04-23 哈尔滨工程大学 小型风力发电机用自稳速风轮
US7246991B2 (en) * 2002-09-23 2007-07-24 John Vanden Bosche Wind turbine blade deflection control system
JP2004308498A (ja) * 2003-04-03 2004-11-04 Mie Tlo Co Ltd 風力発電装置
FR2863318B1 (fr) 2003-12-09 2006-02-10 Ocea Sa Aerogenerateur a pales presentant un bord d'attaque deporte, et pale correspondante
BRPI0400041B1 (pt) * 2004-01-14 2010-05-18 sistema de passo variável para pás de aerogerador.
US8419362B2 (en) * 2004-08-31 2013-04-16 Hamilton Sundstrand Corporation Foldable blades for wind turbines
US7381029B2 (en) * 2004-09-30 2008-06-03 General Electric Company Multi-piece wind turbine rotor blades and wind turbines incorporating same

Also Published As

Publication number Publication date
GB2456716B (en) 2011-05-11
CN101600879A (zh) 2009-12-09
GB2456716A (en) 2009-07-29
US20100092288A1 (en) 2010-04-15
WO2008064678A2 (en) 2008-06-05
US8267651B2 (en) 2012-09-18
GB0908947D0 (en) 2009-07-01
DK178667B1 (da) 2016-10-24
CN101600879B (zh) 2012-07-18
WO2008064678A3 (en) 2008-11-27

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