System for monitoring wind power plants

• US 7,072,784 B2
• Filed: 07/02/2004
• Issued: 07/04/2006
• Est. Priority Date: 10/06/1999
• Status: Expired due to Term

• Current Assignee: Aloys Wobben
• Original Assignee: Aloys Wobben
• Inventors: Wobben, Aloys
• Primary Examiner(s): Tsai, Carol S. W.
• Application Number:
  US10/884,482
• Publication Number:
  US 20040236538A1
• Time in Patent Office: 732 Days
• Field of Search: None
• US Class Current: 702/76
• 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 7/0264 for stopping; controlling in emergency situations orientating out of wind F03D7/0208
• CPC Class Codes: F03D 7/0296 to prevent, counteract or reduce noise emissions
• CPC Class Codes: F03D 7/042 by means of an electrical or electronic controller
• CPC Class Codes: F05B 2260/96 Preventing, counteracting or reducing vibration or noise
• CPC Class Codes: F05B 2270/333 Noise or sound levels
• CPC Class Codes: Y02E 10/72 Wind turbines with rotation axis in wind direction

Abstract

A system to acoustically monitor at least one wind power installation, wherein the wind power installation includes a plurality of components including at least rotor blades. The system may comprise a remote monitoring center and a first wind power installation. The first wind power installation includes a sound pick-up device to detect an operating acoustic spectrum generated by at least one of the components of the first wind power installation during operation thereof, and circuitry to detect when a deviation between the operating acoustic spectrum of the first wind power installation and a reference spectrum exceeds a threshold. The system, in one aspect, may further include communications circuitry to communicate a fault message to the remote monitoring center when the deviation exceeds a threshold. The system may also include a remote monitoring center to monitor the operation of the first wind power installation.

Claims

1. A system to acoustically monitor at least one wind power installation, wherein the wind power installation includes a plurality of components including at least rotor blades, the system comprising:

a remote monitoring center;

a first wind power installation including;

a sound pick-up device to detect an operating acoustic spectrum generated by at least one of the components of the first wind power installation during operation thereof;

circuitry to detect when a deviation between the operating acoustic spectrum of the first wind power installation and a reference spectrum exceeds a threshold; and

communications circuitry to communicate a fault message to the remote monitoring center when the deviation exceeds a threshold.

2. The system of claim 1 wherein the reference spectrum of the first wind power installation is an acoustic spectrum produced by the at least one component of the first wind power installation during normal operation.

3. The system of claim 1 wherein the reference spectrum of the first wind power installation is an acoustic spectrum that is expected to be generated by the at least one component of the first wind power installation during normal operation.

4. The system of claim 1 wherein, in response to the circuitry of the first wind power installation determining the deviation between the operating acoustic spectrum of the first wind power installation and the reference spectrum of the first wind power installation exceeds the threshold, the operation of the first wind power installation is terminated.

5. The system of claim 1 wherein:

the communications circuitry of the first wind power installation communicates the audible sounds of the first wind power installation, which caused the deviation between the operating acoustic spectrum of the first wind power installation and the reference spectrum to exceed the threshold, to the remote monitoring center; and

the remote monitoring center includes a device to permit an operator to listen to the audible sounds of the first wind power installation which caused the deviation between the operating acoustic spectrum and the reference acoustic spectrum to exceed the threshold.

6. The system of claim 5 wherein the remote monitoring center, in response to an input from the operator, terminates the operation of the first wind power installation.

7. The system of claim 1 further including:

a second wind power installation including;

a sound pick-up device to detect an operating acoustic spectrum generated by at least one component of the second wind power installation during operation thereof;

circuitry to detect whether a deviation between the operating acoustic spectrum of the second wind power installation and an associated reference spectrum exceeds an associated threshold; and

communications circuitry to communicate a fault message to the remote monitoring center when the deviation between the operating acoustic spectrum of the second wind power installation and the associated reference spectrum exceeds the associated threshold.

24. The system of claim 1 wherein:

the sound pick-up device detects a second operating acoustic spectrum generated by at least one component of the first wind power installation during operation of the first wind power installation at a second output level;

the circuitry compares the second operating acoustic spectrum to a second reference spectrum to detect if a deviation between the second operating acoustic spectrum and the second reference spectrum exceeds a second threshold; and

the communications circuitry communicates a fault message to the remote monitoring center when the deviation between the second operating acoustic spectrum and the second reference spectrum exceeds the second threshold.

25. The system of claim 24 wherein:

the reference spectrum is an acoustic spectrum produced by the at least one of the components during normal operation and while the first wind power installation is operating at the first power output level; and

the second reference spectrum is an acoustic spectrum produced by the at least one of the components during normal operation and while the first wind power installation is operating at the second power output level.

26. The system of claim 24 wherein:

the first reference spectrum is an acoustic spectrum produced that is expected to be generated by the at least one component during normal operation and while a wind power installation is operating at the second power output level; and

the second reference spectrum is an acoustic spectrum that is expected to be generated by the at least one component during normal operation and while a wind power installation is operating at the second power output level.

27. The system of claim 1 wherein the first reference spectrum is an acoustic spectrum produced by the at least one component during normal operation and while the first wind power installation is operating at the first power output level.

28. The system of claim 1 wherein the first reference spectrum is an acoustic spectrum that is expected to be generated by the at least one component during normal operation and while a wind power installation is operating at the first power output level.

8. A system to acoustically monitor at least one wind power installation, wherein the wind power installation includes a plurality of components including at least a generator, drive train, electronics and rotor blades, the system comprising:

a remote monitoring center to monitor the operation of at least one wind power installation;

a first wind power installation including;

a plurality of sound pick-up devices including;

a first sound pick-up device to detect an operating acoustic spectrum generated by the rotor blades of the first wind power installation during operation of the first wind power installation, including a first operating acoustic spectrum generated by the rotor blades of the first wind power installation during operation of the first wind power installation at a first output level; and

a second sound pick-up device to detect an operating acoustic spectrum generated by the drive train of the first wind power installation during operation thereof;

circuitry to compare the first operating acoustic spectrum of the rotor blades of the first wind power installation to a first reference spectrum and to detect if a deviation between the first operating acoustic spectrum of the rotor blades of the first wind power installation and the first reference spectrum exceeds a first threshold; and

communications circuitry to communicate a fault message to the remote monitoring center when the deviation between the first operating acoustic spectrum of the rotor blades of the first wind power installation and the first reference spectrum exceeds the first threshold.

9. The system of claim 8 wherein:

the first sound pick-up device detects a second operating acoustic spectrum generated by the rotor blades of the first wind power installation during operation of the first wind power installation at a second output level;

the circuitry compares the second operating acoustic spectrum of the rotor blades to a second reference spectrum to detect if a deviation between the second operating acoustic spectrum of the rotor blades of the first wind power installation and the second reference spectrum exceeds a second threshold; and

the communications circuitry communicates a fault message to the remote monitoring center when the deviation between the second operating acoustic spectrum of the rotor blades of the first wind power installation and the second reference spectrum exceeds the second threshold.

10. The system of claim 8 wherein the first reference spectrum is an acoustic spectrum produced by the rotor blades during normal operation and while the first wind power installation is operating at the first power output level.

11. The system of claim 9 wherein:

the first reference spectrum is an acoustic spectrum produced by the rotor blades during normal operation and while the first wind sower installation is operating at the first power output level; and

the second reference spectrum is an acoustic spectrum produced by the rotor blades during normal operation and while the first wind power installation is operating at the second power output level.

12. The system of claim 8 wherein the first reference spectrum is an acoustic spectrum that is expected to be generated by rotor blades during normal operation and while a wind power installation is operating at the first power output level.

13. The system of claim 9 wherein:

the first reference spectrum is an acoustic spectrum produced that is expected to be generated by rotor blades during normal operation and while a wind power installation is operating at the second power output level; and

the second reference spectrum is an acoustic spectrum that is expected to be generated by rotor blades during normal operation and while a wind power installation is operating at the second power output level.

14. The system of claim 8 wherein:

the communications circuitry of the first wind power installation communicates the audible sounds of the first wind power installation, which caused the deviation between the first operating acoustic spectrum of the first wind power installation and the first reference spectrum to exceed the first threshold, to the remote monitoring center; and

the remote monitoring center includes a device to permit an operator to listen to the audible sounds of the first wind power installation which caused the deviation between the first operating acoustic spectrum and the first reference spectrum to exceed the first threshold.

15. The system of claim 8 wherein when the deviation between the first operating acoustic spectrum and the first reference spectrum exceeds the first threshold, the operation of the wind power installation the operation of the first wind power installation is automatically terminated.

16. The system of claim 8 wherein:

the communications circuitry of the first wind power installation communicates the audible sounds, which caused the deviation between the first operating acoustic spectrum and the first reference spectrum to exceed the first threshold, to the remote monitoring center; and

the remote monitoring center includes a signal processing device to analyze the audible sounds to detect a fault.

17. The system of claim 8 further including a second wind power installation including:

a plurality of sound pick-up devices including a first sound pick-up device to detect an operating acoustic spectrum generated by the rotor blades of the second wind power installation during operation of the second wind power installation, wherein the first sound pick-up device of the second wind power installation detects a first operating acoustic spectrum generated by the rotor blades of the second wind power installation during operation of the second wind power installation at a first output level;

circuitry to compare the first operating acoustic spectrum of the rotor blades of the second wind power installation to an associated reference spectrum and to detect if a deviation between the first operating acoustic spectrum of the rotor blades of the second wind power installation and the associated reference spectrum exceeds a first threshold; and

communications circuitry to communicate a fault message to the remote monitoring center when the deviation between the first operating acoustic spectrum of the rotor blades of the second wind power installation and the associated reference spectrum exceeds the first threshold.

18. The system of claim 17 wherein:

the communications circuitry of the first wind power installation communicates the audible sounds, which caused the deviation between the first operating acoustic spectrum of the first wind power installation and the first reference spectrum to exceed the first threshold, to the remote monitoring center; and

the communications circuitry of the second wind power installation communicates the audible sounds, which caused the deviation between the first operating acoustic spectrum of the second wind power installation and the associated reference spectrum to exceed the first threshold, to the remote monitoring center; and

the remote monitoring center includes a signal processing device to analyze the audible sounds of the first and second wind power installations to detect one or more faults.

19. The system of claim 18 wherein the remote monitoring center includes a device to permit an operator to listen to the audible sounds.

20. The system of claim 19 wherein the remote monitoring center, in response to an input from the operator, terminates the operation of the first wind power installation.

21. A system to acoustically monitor comprising:

a remote monitoring center to monitor the operation of at least one wind power installation;

at least one wind power installation to generate electrical power in response to wind, wherein the wind power installation includes;

a plurality of components including at least a generator, drive train and rotor blades;

a plurality of sound pick-up devices including;

a first sound pick-up device to detect an operating acoustic spectrum generated by the rotor blades of the wind power installation during operation of the wind power installation;

a second sound pick-up device to detect an operating acoustic spectrum generated by the drive train of the wind power installation during operation thereof; and

a third sound pick-up device to detect an operating acoustic spectrum generated by the generator of the wind power installation during operation thereof;

circuitry to compare the operating acoustic spectrums of the rotor blades, drive train and generator of the wind power installation to an associated reference spectrum of the wind power installation and to detect if a deviation between the operating acoustic spectrum of the rotor blades, drive train and generator of the wind power installation and the associated reference spectrum exceeds an associated threshold; and

communications circuitry to communicate a fault message to the remote monitoring center when the deviation exceeds the associated threshold.

22. The system of claim 21 wherein a given reference spectrum is an acoustic spectrum produced by an associated component during normal operation.

23. The system of claim 21 wherein a given reference spectrum is an acoustic spectrum that is expected to be generated by an associated component during normal operation.