Method of operating a wind turbine and wind turbine
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0150951
(2008-05-01)
|
등록번호 |
US-8202048
(2012-06-19)
|
우선권정보 |
EP-07008976 (2007-05-03) |
발명자
/ 주소 |
- Stiesdal, Henrik
- Winther-Jensen, Martin
|
출원인 / 주소 |
- Siemens Aktiengesellschaft
|
인용정보 |
피인용 횟수 :
8 인용 특허 :
1 |
초록
▼
The invention concerns a method of operating a wind turbine, wherein for a reduction of a wind load impacting on the wind turbine the rotational speed of the rotor and/or the electrical power output of the wind turbine are reduced depending on a deviation of the wind speed from the average wind spee
The invention concerns a method of operating a wind turbine, wherein for a reduction of a wind load impacting on the wind turbine the rotational speed of the rotor and/or the electrical power output of the wind turbine are reduced depending on a deviation of the wind speed from the average wind speed. Moreover the invention concerns a wind turbine comprising a calculating unit adjusted for executing the inventive method.
대표청구항
▼
1. A method of operating a wind turbine having a rotor, comprising: determining a wind speed;determining an average wind speed;determining a deviation of the wind speed from the average wind speed;comparing the deviation of the wind speed with a threshold value; andwhen the deviation of the wind spe
1. A method of operating a wind turbine having a rotor, comprising: determining a wind speed;determining an average wind speed;determining a deviation of the wind speed from the average wind speed;comparing the deviation of the wind speed with a threshold value; andwhen the deviation of the wind speed from the average wind speed attains or exceeds a threshold value reducing a rotor rotational speed, oran electrical power output of the wind turbine orboth the rotor rotational speed and the electrical power output of the wind turbine as a function of the deviation of the wind speed from the average wind speed. 2. The method according to claim 1, wherein the deviation of the wind speed from the average wind speed is determined as a standard deviation. 3. The method according to claim 1, wherein the deviation of the wind speed from the average wind speed is iterative determined in consideration of the average wind speed and the instantaneous wind speed. 4. The method according to claim 1, wherein the deviation of the wind speed from the average wind speed is determined according to the following equations: Dn=C·num(Vinst,n−Vav,n)+(1−C)·Dn-1 (1)Vav,n=C·Vinst,n+(1−C)·Vav,n-1 (2)withDn deviation sum at the n′th calculation step,Dn−1 deviation sum at the previous calculation step,Vav,n average wind speed at the n′th calculation step,Vav,n−1 average wind speed at the previous calculation step,Vinst,n instantaneous wind speed at the n′th calculation step,C constant being a number between 0 and 1 andnum numerical value. 5. The method according to claim 1, wherein the rotational speed of the rotor and/or the electrical power output are reduced in consideration of a further meteorological parameter. 6. The method according to claim 5, wherein the further meteorological parameter is the deviation of the wind direction from the average wind direction. 7. The method according to claim 6, wherein the deviation of the wind direction from the average wind direction is determined as a standard deviation. 8. The method according to claim 5, further comprising determining a load value. 9. The method according to claim 8, wherein the relation of the load value and the meteorological parameter is determined by simulation and/or by field measurement of loading. 10. The method according to claim 9, wherein the relation of the load value and the meteorological parameter is determined in an adjusting process based on a measurement value acquired by a transducer. 11. The method according to claim 10, wherein the transducer is an accelerometer or a strain gauge. 12. The method according to claim 11, wherein the rotational speed of the rotor and/or the electrical power output of the wind turbine are reduced, when the load value attains or exceeds a threshold load value. 13. The method according to claim 12, wherein the rotational speed of the rotor and/or the electrical power output of the wind turbine are reduced as a function of the load value. 14. A wind turbine, comprising: a tower;a nacelle arranged upon the tower, wherein the tower supports the nacelle;a rotor rotatably arranged within the nacelle, wherein the rotor has a hub and a plurality of pitch controlled rotor blades;an electric generator connected to and driven by the rotor;a measuring device that measures a wind speed; anda calculating unit that: determines an average wind speed;determines a deviation of the wind speed from the average wind speed;compares the deviation of the wind speed with a threshold value; andwhen the deviation of the wind speed from the average wind speed attains or exceeds a threshold value, reduces a rotor rotational speed, oran electrical power output of the wind turbine orboth the rotor rotational speed and the electrical power output of the wind turbine as a function of the deviation of the wind speed from the average wind speed.
이 특허에 인용된 특허 (1)
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Holley William E. (Pleasanton CA), Speed control system for a variable speed wind turbine.
이 특허를 인용한 특허 (8)
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Engler, Joseph J., Agent-based chaotic control of wind turbines.
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Engler, Joseph J., Diploid control of water heaters.
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Nayebi, Kouroush; Herbsleb, Eik, Method of controlling a wind power plant.
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Engler, Joseph J., Prediction method of predicting a future state of a system.
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Gerber, Brandon Shane; Perley, Thomas Franklin; Rastogi, Rahul, System and method for controlling a wind turbine.
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Kooijman, Henk-Jan; Schmitt, Neils Chris; Dagg, Kapil, System and method for operating a wind turbine.
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Zheng, Danian; Huang, Xiongzhe; Holley, William Edwin; Shane, Conner B.; Penmatsa, Raveendra; Gandhi, Jignesh Govindlal; Cribbs, Timothy Botsford, System and method for reducing oscillation loads of wind turbine.
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Myers, Michael R.; Engler, Joseph J., Wind prediction for wind farms through the use of weather radar.
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