System and method for controlling a wind turbine during loss of grid power and changing wind conditions
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
UP-0241186
(2008-09-30)
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등록번호 |
US-7719128
(2010-06-10)
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발명자
/ 주소 |
- Kammer, Leonardo Cesar
- Mehendale, Charudatta Subhash
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
9 인용 특허 :
7 |
초록
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An apparatus and method for controlling a wind turbine having a plurality of blades such that the blade angle of each blade is continuously adjusted during loss of grid power relative to a wind direction relative to an orientation of the nacelle (i.e., yaw offset) and a rotor azimuth while keeping t
An apparatus and method for controlling a wind turbine having a plurality of blades such that the blade angle of each blade is continuously adjusted during loss of grid power relative to a wind direction relative to an orientation of the nacelle (i.e., yaw offset) and a rotor azimuth while keeping the orientation of the nacelle of the wind turbine substantially constant. The wind turbine is capable of pitching the blades a full 360 degrees and generating power from the rotation of the rotor shaft during loss of grid power.
대표청구항
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The invention claimed is: 1. A method for controlling a wind turbine having a plurality of blades, a nacelle and a rotor, each blade having a blade angle, said method comprising continuously adjusting the blade angle of each blade during loss of grid power relative to a yaw offset and a rotor azimu
The invention claimed is: 1. A method for controlling a wind turbine having a plurality of blades, a nacelle and a rotor, each blade having a blade angle, said method comprising continuously adjusting the blade angle of each blade during loss of grid power relative to a yaw offset and a rotor azimuth while keeping an orientation of the nacelle of the wind turbine substantially constant, wherein each blade angle is continuously adjusted according to the following: θ=tan−1(1/tan Vd·cos φ), where θ is the blade angle, Vd is the yaw offset, and φ is the rotor azimuth. 2. The method of claim 1, wherein the wind turbine is provided with electrical energy from an uninterruptible power supply to selectively adjust the blade angle of each blade during loss of grid power. 3. The method of claim 1, wherein the blade angle is utilized to control a rotational speed of the rotor at a substantially constant, non-zero reference value, thereby providing electrical power to the wind turbine. 4. The method of claim 1, wherein the substantially constant, non-zero reference value in a range between about 0.1 rad/s and about 0.5 rad/s. 5. A wind turbine comprising a rotor, a nacelle, a plurality of blades, a control system configured to measure a blade angle for each blade, and a blade pitch drive to move the blade angle, wherein the control system continuously adjusts the blade angle of each blade during loss of grid power relative to a yaw offset and a rotor azimuth while keeping an orientation of the nacelle of the wind turbine substantially constant, wherein each blade angle is continuously adjusted according to the following: θ=tan−1(1/tan Vd·cos φ), where θ is the blade angle, Vd is the yaw offset, and φ is the rotor azimuth. 6. The wind turbine of claim 5, wherein the wind turbine is provided with electrical energy from an uninterruptible power supply to selectively adjust the blade angle of each blade during loss of grid power. 7. The wind turbine of claim 5, wherein the blade angle is further adjusted such that a rotational speed of the rotor is maintained at a substantially constant, non-zero reference value, thereby providing electrical power to the wind turbine. 8. The wind turbine of claim 5, wherein the substantially constant, non\-zero reference value in a range between about 0.1 rad/s and about 0.5 rad/s. 9. A method for controlling a wind turbine having a plurality of blades, said method comprising continuously varying a blade angle of each blade during loss of grid power such that a rotational speed of a rotor is maintained at a substantially constant non-zero reference value, wherein the blade angle is continuously adjusted relative to a yaw offset and a rotor azimuth while keeping an orientation of a nacelle of the wind turbine substantially constant according to the following equation: θ = tan - 1 ( 1 tan V d · cos φ ) , where θ is the blade angle, Vd is the yaw offset, and φ is the rotor azimuth.
이 특허에 인용된 특허 (7)
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Llorente Gonzalez,Jose Ignacio, Method of operating a wind turbine.
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Moroz,Emilian Mieczyslaw; Pierce,Kirk Gee, Methods and apparatus for reduction of asymmetric rotor loads in wind turbines.
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Deering Kenneth J. (Seattle WA), Rotor device and control for wind turbine.
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Kenneth J. Deering ; Dean A. Davis, Rotor pitch control method and apparatus for parking wind turbine.
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Harner Kermit I. (Windsor CT) Kos Joseph M. (Holyoke MA) Patrick John P. (South Windsor CT), Wind turbine generator pitch control system.
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Kisovec Adrian V. (Munich DEX), Wind turbine rotor speed control system.
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Doman Glidden S. (Granby CT), Wind turbine with drive train disturbance isolation.
이 특허를 인용한 특허 (9)
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Yoshida, Shigeo, Horizontal axis wind turbine.
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Grabau, Peter, Method and system to actively pitch to reduce extreme loads on wind turbine.
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Obrecht, John M.; Schibsbye, Karsten, Method for controlling loads in a wind turbine.
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Nohara, Osamu; Yokoyama, Katsuhiko; Tanabe, Sadayuki, Speed reducer for use in yaw drive apparatus for wind power generation apparatus, and yaw drive method and apparatus for wind power generation apparatus using the speed reducer.
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Burra, Rajni Kant; Abate, Victor Robert; Magnuson, David Cole; Longtin, Keith, System and method for controlling wind power generation systems.
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Burra, Rajni Kant; Ganireddy, Govardhan; Abate, Victor Robert; Longtin, Keith Andrew; Wiegman, Herman Lucas Norbert; Delmerico, Robert William, System and method for providing yaw backup to a wind farm.
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Preus, Robert W., System for providing dynamic pitch control in a wind turbine.
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Steffensen, Ulrik, System for rotating a wind turbine blade.
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Andresen, Bjorn, Wind power installation and method of modifying the blade pitch in a wind power installation.
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