Systems for load reduction in a tower of an idled wind-power unit and methods thereof
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H02P-009/04
F03D-007/02
출원번호
US-0315907
(2011-12-09)
등록번호
US-8816520
(2014-08-26)
발명자
/ 주소
Bywaters, Garrett L.
Cate, Austin
Petter, Jeffrey K.
출원인 / 주소
Northern Power Systems, Inc.
대리인 / 주소
Downs Rachlin Martin PLLC
인용정보
피인용 횟수 :
0인용 특허 :
23
초록▼
Systems and methods for reducing dynamic loading in an idled wind power unit include sensing at least one parameter indicative of dynamic loading and executing a reduced torque brake mode, which may comprise a controlled brake and brake-release sequence, with the turbine braking system when the sens
Systems and methods for reducing dynamic loading in an idled wind power unit include sensing at least one parameter indicative of dynamic loading and executing a reduced torque brake mode, which may comprise a controlled brake and brake-release sequence, with the turbine braking system when the sensed parameter exceeds a selected value. The reduced torque brake mode absorbs energy and reduces dynamic loading thereby.
대표청구항▼
1. A system for reducing dynamic loading in a wind power unit in a parked or idled condition, the wind power unit including a turbine, a turbine axle having a longitudinal axis, and a wind power unit brake system including at least one turbine brake, the system comprising: a sensor adapted to be pos
1. A system for reducing dynamic loading in a wind power unit in a parked or idled condition, the wind power unit including a turbine, a turbine axle having a longitudinal axis, and a wind power unit brake system including at least one turbine brake, the system comprising: a sensor adapted to be positioned with the wind power unit and configured to sense at least one parameter indicative of dynamic loading in the wind power unit and produce a dynamic loading signal representative thereof; anda logic circuit in communication with said sensor to receive said dynamic loading signal, said logic circuit being configured to generate a braking signal in response to the dynamic loading signal indicating a level of dynamic loading exceeding a selected value;wherein the brake system is configured to receive said braking signal and, when said wind power unit is in either a parked condition with the brake applied or in an idled condition with the brake off, execute a reduced torque brake mode in response to said braking signal to reduce the dynamic loading of the wind power unit by permitting intermittent slip of the brake system. 2. A system according to claim 1, wherein the logic circuit comprises a threshold detector communicating with a latching relay. 3. A system according to claim 2, wherein the logic circuit further comprises a low pass filter receiving the signal from the sensor and communicating with the threshold detector. 4. A system according to claim 1, wherein the wind power unit further includes a processor, and the logic circuit comprises a program configured to be executed by the processor comprising steps of: determining a level of dynamic loading indicated by said dynamic loading signal;comparing the level of dynamic loading to said selected value; andoutputting said braking signal in response to the dynamic loading exceeding said selected value. 5. A system according to claim 4, wherein the braking signal includes instructions for execution of a controlled application and release of the at least one turbine brake by the brake system. 6. A system according to claim 1, wherein said sensor is configured to sense dynamic loading including at least a component of motion perpendicular to the longitudinal axis of the turbine axle. 7. A system according to claim 1, wherein said sensor is an accelerometer. 8. A system according to claim 1, wherein said sensor is a displacement sensor. 9. A system according to claim 8, wherein said at least one parameter includes oscillation frequency. 10. A system according to claim 1, wherein said sensor is a vibration sensor. 11. A system according to claim 1, wherein said reduced torque brake mode comprises a controlled application and release of the brake system. 12. A system according to claim 1, wherein said reduced torque brake mode comprises application of partial braking torque. 13. A system according to claim 1, wherein said reduced torque brake mode comprises adjustment of a brake pad position within the braking system. 14. A system for reducing dynamic loading in a wind power unit in a parked or idled condition, the wind power unit being mounted on a tower and including a turbine, a turbine axle having a longitudinal axis, and a wind power unit brake system including at least one turbine brake, the system comprising: a sensor comprising a strain sensor on the tower and configured to sense strain in the tower as indicative of dynamic loading in the wind power unit and produce a dynamic loading signal representative thereof; anda logic circuit in communication with said sensor to receive said dynamic loading signal, said logic circuit being configured to generate a braking signal in response to the dynamic loading signal indicating a level of dynamic loading exceeding a selected value;wherein the brake system is configured to receive said braking signal and, when said wind power unit is in either a parked condition with the brake applied or in an idled condition with the brake off, execute a reduced torque brake mode in response to said braking signal to reduce the dynamic loading of the wind power unit by permitting intermittent slip of the brake system. 15. A method of reducing dynamic loading in a parked wind power unit, the wind power unit including a turbine on a turbine axle and a brake system, the method comprising: sensing a parameter indicative of dynamic loading of the wind power unit when said unit is in a parked condition with the brake applied;determining if the sensed parameter is at least at a selected value; andinstructing the brake system, when said sensed parameter is at least at the selected value, to execute a reduced torque brake mode to reduce the dynamic loading of the tower. 16. A method according to claim 15, wherein said sensing includes sensing dynamic loading including a component of movement perpendicular to the turbine axle. 17. A method according to claim 15, further comprising sensing a parameter indicative of dynamic loading of the wind power unit when said unit is in an idled condition, and determining if the turbine is rotating freely before instructing the brake system to execute a full brake operation followed by the reduced torque brake mode. 18. A method according to claim 15, wherein said reduced torque brake mode comprises execution of a controlled brake and brake-release sequence by the brake system. 19. A method according to claim 18, wherein the controlled brake and bake-release sequence comprises application and release of the brake system. 20. A method according to claim 15, wherein the reduced torque brake mode comprises applying the brake system at partial braking torque. 21. A method according to claim 15, wherein the reduced torque brake mode comprises adjusting of a brake pad position within the braking system. 22. A method according to claim 15, wherein the parameter is displacement. 23. A method according to claim 15, wherein the parameter is vibration frequency. 24. A method according to claim 15, wherein the parameter is acceleration. 25. A method according to claim 15, wherein the wind power unit is mounted on a tower and the parameter is strain measured in a tower structure. 26. A system for reducing dynamic loading in a wind power unit in a parked condition, the wind power unit including a turbine, a turbine axle having a longitudinal axis, and a wind power unit brake system including at least one turbine brake, the system comprising: a sensor adapted to be positioned with the wind power unit and configured to sense at least one parameter indicative of dynamic loading in the wind power unit when said unit is parked with the brake system applied and produce a signal representative thereof;means, communicating with said sensor to receive said dynamic loading signal, for generating a braking signal in response to the level of dynamic loading exceeding a selected value and outputting the braking signal to the braking system, wherein the braking signal includes instructions for execution of a reduced torque brake mode to reduce the dynamic loading of the wind power unit by permitting intermittent slip of the parked turbine. 27. A system for reducing dynamic loading in a wind power unit in a parked or idled condition, the wind power unit including a turbine, a turbine axle having a longitudinal axis, and a wind power unit brake system including at least one turbine brake, the system comprising: a sensor adapted to be positioned with the wind power unit and configured to sense at least one parameter indicative of dynamic loading in the wind power unit and produce a signal representative thereof;a processor, communicating with said sensor to receive said dynamic loading signal, for generating a braking signal in response to the level of dynamic loading, said processor executing program instructions comprisingdetermining whether the dynamic loading exceeds a selected value;determining a state of the turbine brake system as currently on or currently off;instructing the braking system to change the braking torque from full to reduced braking torque if the brake is currently on; andinstructing the braking system to apply reduced braking torque if the brake is currently off. 28. A system according to claim 26, wherein means for generating a braking signal comprises a threshold detector communicating with a latching relay. 29. A system according to claim 28, wherein said means for generating a braking signal further comprises a low pass filter receiving the signal from the sensor and communicating with the threshold detector. 30. A system for reducing dynamic loading in a wind power unit in a parked or idled condition, the wind power unit including a turbine, and a turbine axle having a longitudinal axis, the system comprising: a sensor adapted to be positioned with the wind power unit and configured to sense at least one parameter indicative of dynamic loading in the wind power unit and produce a signal representative thereof, the dynamic loading including at least a component of motion perpendicular to the longitudinal axis of the turbine axle;a processor in communication with said sensor to receive said representative signal, said processor being configured and programmed to determine a level of dynamic loading indicated by the sensed parameter and compare said level to at least one selected value, said processor being further programmed to generate a braking instruction in response to the level of dynamic loading exceeding a selected valve; anda wind power unit brake system including at least one turbine brake, the system configured to receive the braking instruction from said processor, wherein said braking instruction includes a controlled braking and brake-release command for the brake, the controlled braking and brake-release command causing execution by said brake system of a reduced torque brake mode to reduce the dynamic loading of the wind power unit by permitting intermittent slip of the parked turbine.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (23)
Bywaters,Garrett; Danforth,William; Bevington,Christopher; Stowell,Jesse; Costin,Daniel, Direct drive wind turbine.
Pierce,Kirk G.; LeMieux,David Lawrence; Blakemore,Ralph W., Method and apparatus for wind turbine rotor load control based on shaft radial displacement.
Willey,Lawrence Donald; Cunningham,John Noel; Gebhardt,Eric; Uphues,Ulrich; Holley,William Edwin; Pierce,Kirk Gee, Methods and apparatus for controlling rotational speed of a rotor.
Avagliano, Aaron John; Teichmann, Ralph; Pierce, Kirk Gee; Hopewell, Paul David; Deshpande, Ameet Shridhar; Eker, Sukru Alper, System and method for operating a wind farm under high wind speed conditions.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.