IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0156541
(2011-06-09)
|
등록번호 |
US-8258773
(2012-09-04)
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발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
5 |
초록
▼
A system and method for detecting lightning strikes on a wind turbine includes detecting and measuring a parameter that is indicative of a lightning strike, which may be current induced in a conductor as a result of the lightning strike. A current receptor may be located on a component of the wind t
A system and method for detecting lightning strikes on a wind turbine includes detecting and measuring a parameter that is indicative of a lightning strike, which may be current induced in a conductor as a result of the lightning strike. A current receptor may be located on a component of the wind turbine and electrically coupled to a ground conductor. A current sensor is disposed on the ground conductor and generates a primary current I(p) that is proportional to a lightning strike current flowing through the ground conductor upon a lighting strike on the receptor. A signal converter sub-system is configured to convert the primary current I(p) into a processing signal. A processing sub-system is configured to receive and use the processing signal to determine an actual lightning strike on the wind turbine.
대표청구항
▼
1. A system for detecting lightning strikes on a wind turbine, comprising: a lightning strike receptor located on a component of the wind turbine and electrically coupled to a ground conductor;a current sensor disposed on said ground conductor, said current sensor generating a primary current I(p) t
1. A system for detecting lightning strikes on a wind turbine, comprising: a lightning strike receptor located on a component of the wind turbine and electrically coupled to a ground conductor;a current sensor disposed on said ground conductor, said current sensor generating a primary current I(p) that is proportional to a lightning strike current flowing through said ground conductor upon a lighting strike on said receptor;a signal converter sub-system configured to generate a processing signal by stepping down said primary current I(p) to a signal current I(s) that is proportional to a magnitude of the lightning strike; and,a processing sub-system configured to receive and use said processing signal to determine an actual lightning strike on the wind turbine. 2. The system as in claim 1, wherein said processing sub-system is configured to indicate an actual lightning strike on the wind turbine when said processing signal exceeds a threshold value. 3. The system as in claim 2, wherein said processing sub-system is interfaced with a wind turbine controller to transmit indication of the actual lightning strike to said wind turbine controller. 4. The system as in claim 3, wherein said wind turbine controller is in communication with a remote monitoring station, wherein parameters indicative of a lightning strike on the wind turbine are conveyed to said remote monitoring station. 5. The system as in claim 2, wherein said processing sub-system further comprises a processing unit configured to further process said processing signal to define a magnitude of the lightning strike as a function of said processing signal. 6. The system as in claim 5, wherein the magnitude of the lightning strike is determined by comparison of the processing signal to a plurality of threshold values that define magnitude ranges. 7. The system as in claim 1, wherein said receptor is mounted to a blade of the wind turbine and electrically coupled to a ground conductor disposed within said blade, said current sensor configured with said blade ground conductor, wherein a lighting strike on the individual respective said blade is detected and registered by said processing sub-system. 8. A system for detecting lightning strikes on a wind turbine, comprising: a lightning strike receptor located on a component of the wind turbine and electrically coupled to a ground conductor;a current sensor disposed on said ground conductor, said current sensor generating a primary current I(p) that is proportional to a lightning strike current flowing through said ground conductor upon a lighting strike on said receptor;a signal converter sub-system configured convert rt said primary current I(p) into a processing signal;a processing sub-system configured to receive and use said processing signal to determine an actual lightning strike on the wind turbine; andwherein said current sensor comprises a core member with a primary winding disposed around said ground conductor, said primary current I(p) induced in said primary winding, and said signal converter sub-system comprises one or more current transformers arranged in series with said current sensor to step down said primary current I(p) to a signal current I(s). 9. The system as in claim 8, wherein signal converter sub-system further comprises a converter that converts said signal current I(s) to a signal voltage (V(s)), said signal voltage V(s) received by said comparator and compared to a threshold voltage for providing an indication of a lightning strike on the wind turbine. 10. A wind turbine, comprising: a plurality of turbine blades mounted to a rotor hub, each of said turbine blades comprising a root, a tip, and a pressure side and a suction side extending between said tip and said root;said turbine blades further comprising a plurality of lightning receptors configured along either or both of said pressure side or said suction side and electrically coupled to a blade ground conductor disposed within said blade;said blade ground conductors electrically coupled to a main ground conductor;a current sensor disposed on at least one of said main ground conductor or one of said blade ground conductors, said current sensor generating a primary current I(p) that is proportional to a lightning strike current flowing through said main or blade ground conductor upon a lighting strike on said receptor;a signal converter sub-system configured to generate a processing signal by stepping down said primary current I(p) to a signal current I(s) that is proportional to a magnitude of the lightning strike; and,a processing sub-system configured to receive and use said processing signal to determine an actual lightning strike on the wind turbine. 11. The wind turbine as in claim 10, wherein a respective said current sensor is configured with each said blade ground conductor such that lightning strikes on individual respective blades are detected and registered by said processing sub-system. 12. The wind turbine as in claim 11, wherein a respective said current sensor is configured with each said receptor. 13. The wind turbine as in claim 10, further comprising a wind turbine controller interfaced with a remote monitoring station, said processing sub-system interfaced with said wind turbine controller, wherein an indication of an actual lightning strike on said wind turbine is transmitted to said wind turbine controller and said remote monitoring station. 14. A wind turbine, comprising: a plurality of turbine blades mounted to a rotor hub, each of said turbine blades comprising a root, a tip, and a pressure side and a suction side extending between said tip and said root;said turbine blades further comprising a plurality of lightning receptors configured along either or both of said pressure side or said suction side and electrically coupled to a blade ground conductor disposed within said blade;said blade ground conductors electrically coupled to a main ground conductor;a current sensor disposed on at least one of said main ground conductor or one of said blade ground conductors, said current sensor generating a primary current I(p) that is proportional to a lightning strike current flowing through said main or blade ground conductor upon a lighting strike on said receptor;a signal converter sub-system configured to convert said primary current I(p) into a processing signal;a processing sub-system configured to receive and use said processing signal to determine an actual lightning strike on the wind turbine; andwherein said current sensor comprises a core member with a primary winding disposed around said ground conductor, said primary current I(p) induced in said primary winding, and said signal converter sub-system comprises one or more current transformers arranged in series with said current sensor to step down said primary current I(p) to a signal current I(s). 15. The wind turbine as in claim 14, wherein signal converter sub-system further comprises a converter that converts said signal current I(s) to a signal voltage V(s), said signal voltage V(s) received by said comparator and compared to a threshold voltage for providing an indication of a lightning strike on the wind turbine. 16. A method for detecting lightning strikes on a wind turbine, comprising: detecting and measuring a parameter that is indicative of an actual lightning strike on a component of the wind turbine;comparing the measured parameter to a threshold value, wherein the threshold value is set such that a magnitude of the measured parameter equal to or exceeding the threshold value indicates an actual lightning strike on the wind turbine; andwherein the detected parameter is current induced in a conductor from a lightning strike on a component of the wind turbine, the method further comprising stepping down the current to a signal current and converting the signal current into a processing signal that is proportional to a magnitude of the lightning strike. 17. The method as in claim 16, further comprising setting a plurality of the threshold values to define ranges within which the processing signal falls, whereby a magnitude of the lightning strike is determined by the ranges. 18. The method as in claim 17, wherein one of the threshold values is set at a warranty limit for the component of the wind turbine blade struck by lightning. 19. The method as in claim 16, further comprising transmitting indication of an actual lightning strike to a remote monitoring station.
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