[특허]Speed control system for a variable speed wind turbine

Speed control system for a variable speed wind turbine 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H02P-009/00 F03D-007/00
출원번호	US-0762924 (1991-09-19)
발명자 / 주소	Holley William E. (Pleasanton CA)
출원인 / 주소	U.S. Windpower, Inc. (Livermore CA 02)
인용정보	피인용 횟수 : 83 인용 특허 : 0

초록 ▼

A controller and method is disclosed for operating a variable speed turbine to better track wind speed fluctuations for greater efficiency in conversion of wind energy to electrical energy. The controller of the invention controls the rotor speed in accordance with a wind speed supplied by a wind observer in order to approximately follow the varying wind speeds. The wind observer predicts the average wind speed at a subsequent point in time over the cross-section presented to the wind by the wind turbine. The average wind speed is applied to a parameter schedule to determine desired values for rotor speed and torque which are used by arotor speed stabilizer to command a reference load torque. The load torque of the generator is controlled in accordance with the commanded load torque, and therefore the desired rotor speed is approximated. During operation, the wind speed prediction process is repeated at each subsequent time interval, and the load torque, and therefore rotor speed, is controlled accordingly. The wind observer calculates the aerodynamic torque and then calculates net torque. The wind speed is predicted as a function of the present (previously predicted) wind speed and correction terms including net torque and the difference between the predicted and actual rotor speed. The wind observer is useful whenever the wind turbine rotor is turning, whether or not it is producing power.

대표청구항 ▼

A wind turbine controller for a variable speed wind turbine including a variable speed generator driven by a rotor, said wind turbine having one or more aerodynamic surfaces for converting wind power into a driving torque on the rotor, said controller predicting the wind speed averaged over the sweep of the aerodynamic surfaces, said controller selecting a reference load torque in response to the predictions for the wind speed in order to achieve efficient generator operation, said controller comprising: means for sensing the rotor speed; a wind speed observer including means for estimating the driving torque on the rotor at a present time ti, and, means for predicting the wind speed at a subsequent point in time ti+D

이 특허를 인용한 특허 (83)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Speed control system for a variable speed wind turbine 원문보기

초록 ▼

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연구과제 타임라인

이 특허를 인용한 특허 (83)

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Speed control system for a variable speed wind turbine 원문보기

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연구과제 타임라인

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이 특허를 인용한 특허 (83)

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