Method and apparatus for wind turbine rotor load control

• US 6,888,262 B2
• Filed: 02/03/2003
• Issued: 05/03/2005
• Est. Priority Date: 02/03/2003
• Status: Active Grant

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Blakemore, Ralph W.
• Primary Examiner(s): Ponomarenko, Nicholas
• Application Number:
  US10/357,660
• Publication Number:
  US 20040151584A1
• Time in Patent Office: 820 Days
• Field of Search: 290/43, 290/44, 290/54, 290/55, 416/61, 416/175
• US Class Current: 290/44
• CPC Class Codes: F03D 17/00 Monitoring or testing of wind motors, e.g. diagnostics testing during commissioning of wind motors F03D13/30
• CPC Class Codes: F03D 7/0204 for orientation in relation to wind direction
• CPC Class Codes: F03D 7/0224 Adjusting blade pitch
• CPC Class Codes: F05B 2270/328 Blade pitch angle
• CPC Class Codes: F05B 2270/329 Azimuth or yaw angle
• CPC Class Codes: F05B 2270/331 Mechanical loads
• CPC Class Codes: Y02E 10/72 Wind turbines with rotation axis in wind direction

Abstract

A wind turbine. In one embodiment, the wind turbine includes a platform and one or more gyroscopes connected to the platform to detect movement of the platform. A control circuit is coupled with the one or more gyroscopes to determine loads placed on one or more turbine components and to mitigate the loads in response to signals from the one or more gyroscopes.

Claims

1. A wind turbine comprising:

a platform;

one or more gyroscopes connected to the platform to detect movement of the platform; and

a control circuit coupled with the one or more gyroscopes to determine loads acting on one or more turbine component in response to signals from the one or more gyroscopes, the control circuit to cause a change in operational parameters in response to the signals from the one or more gyroscopes.

2. The wind turbine of claim 1 wherein the control circuit mitigates the load by controlling a pitch of one or more blades.

3. The wind turbine of claim 1 further comprising a gyroscope platform connected to the platform, the gyroscope platform having one or more gyroscopes to detect linear rates of change of the platform.

4. The wind turbine of claim 1 further comprising a gyroscope platform connected to the platform, the gyroscope platform having one or more gyroscopes to detect angular rates of change of the platform.

5. The wind turbine of claim 1 wherein the one or more gyroscopes detect a pitch displacement of the platform.

6. The wind turbine of claim 1 wherein the one or more gyroscopes detect a yaw displacement of the platform.

7. The wind turbine of claim 1 wherein the one or more gyroscopes detect a roll displacement of the platform.

8. The wind turbine of claim 1 wherein the one or more gyroscopes comprises one or more piezo-electric gyroscopes.

9. The wind turbine of claim 1 wherein the one or more gyroscopes comprises one or more electromechanical gyroscopes.

10. The wind turbine of claim 1 wherein the one or more gyroscopes comprises one or more laser gyroscopes.

11. The wind turbine of claim 1 further comprising a memory coupled with the control circuit to store instructions to be executed by the control circuit, wherein the instructions cause the control circuit to determine a load based on the signals from the one or more gyroscopes.

12. The wind turbine of claim 11 further comprising a blade pitch controller coupled with the control circuit, wherein the instructions cause the control circuit to cause the blade pitch controller to change the pitch of one or more blades.

13. A wind turbine comprising:

a first platform;

means for detecting movement of the first platform; and

means for mitigating wind turbine loads in response to signals from the one or more gyroscopes.

14. The wind turbine of claim 13 wherein the means for mitigating wind turbine loads comprises means for controlling a pitch of one or more blades.

15. The wind turbine of claim 14 wherein the means for detecting movement of the first platform comprise means for detecting angular rates of change of the first platform.

16. The wind turbine of claim 14 wherein the means for detecting movement of the first platform comprise means for detecting linear rates of change of the first platform.

17. The wind turbine of claim 14 wherein the means for detecting movement of the first platform comprises means for detecting a pitch displacement of the first platform.

18. The wind turbine of claim 14 wherein the means for detecting movement of the first platform comprises means for detecting a yaw displacement of the first platform.

19. The wind turbine of claim 14 wherein the means for detecting movement of the first platform comprises means for detecting a roll displacement of the first platform.

20. A method comprising:

receiving signals from one or more gyroscopes indicating movement of a wind turbine platform;

determining a load placed on one or more components of a wind turbine based on the signals from the gyroscope; and

changing one or more operational parameters based on the determined load.

21. The method of claim 20 wherein changing the one or more operational parameters comprises causing one or more blades of the wind turbine to change pitch based on the determined load.

22. The method of claim 20 further comprising the one or more gyroscopes detecting angular rates of change of the platform;

and generating the signals received from the gyroscopes, the signals being proportional to the angular rates of change detected.

23. The method of claim 20 further comprising the one or more gyroscopes detecting linear rates of change of the platform;

and generating the signals received from the gyroscopes, the signals being proportional to the linear rates of change detected.

24. A method comprising:

receiving signals from one or more gyroscopes indicating movement of a wind turbine platform atop a tower;

determining movement of the platform based on the signals from the gyroscope; and

causing one or more blades of the wind turbine to change pitch based on the determined movement.

25. The method of claim 24 further comprising the one or more gyroscopes detecting angular rates of change of the platform;

and generating the signals received from the gyroscopes, the signals being proportional to the angular rates of change detected.

26. The method of claim 24 further comprising the one or more gyroscopes detecting linear rates of change of the platform;

and generating the signals received from the gyroscopes, the signals being proportional to the linear rates of change detected.

27. An article comprising an electronically-readable medium having stored thereon instructions that, when executed, cause one or more processors to:

receive signals from one or more gyroscopes indicating movement of a wind turbine platform atop a tower;

determine a load placed on one or more components of a wind turbine based on the signals from the gyroscope; and

cause one or more blades of the wind turbine to change pitch based on the determined load.

28. The article of claim 27 wherein the one or more gyroscopes detect angular rates of change of the platform and the signals received from the gyroscopes are proportional to the angular rates of change detected.

29. The article of claim 27 wherein the one or more gyroscopes detect linear rates of change of the platform and the signals received from the gyroscopes are proportional to the linear rates of change detected.