METHOD FOR STARTING UP A WIND ENERGY PLANT AFTER AN OPERATION STOPPAGE AND WIND ENERGY PLANT WHICH CAN EXECUTE THE METHOD

• US 20090001723A1
• Filed: 10/05/2007
• Published: 01/01/2009
• Est. Priority Date: 06/30/2007
• Status: Active Grant

• Current Assignee: Nordex Energy GmbH (Nordex Se)
• Original Assignee: Nordex Energy GmbH (Nordex Se)
• Inventors: Nitzpon, Joachim, Harms, Ulrich, Karstens, Hauke
• Granted Patent: US 7,809,477 B2
• Time in Patent Office: Days
• US Class Current: 290/44
• CPC Class Codes: F03D 7/026 for starting-up
• CPC Class Codes: F03D 80/70 Bearing or lubricating arrangements
• CPC Class Codes: F05B 2260/85 Starting
• CPC Class Codes: F05B 2270/1033 Power (if explicitly mentioned)
• CPC Class Codes: F05B 2270/109 to prolong engine life
• CPC Class Codes: F05B 2270/303 Temperature
• CPC Class Codes: F16H 35/10 Arrangements or devices for absorbing overload or preventing damage by overload for screw mechanisms F16H25/2021
• CPC Class Codes: Y02E 10/72 Wind turbines with rotation axis in wind direction

Abstract

A method for starting up a wind energy plant after an operation stoppage, wherein the wind energy plant has a gearbox in the drive train and an operation management which can control at least one operational variable significant for the strain of the gearbox B of the wind energy plant to a desired value B_Soll, wherein after the operation stoppage, the desired value B_Soll is limited by a maximum value B_Max, which is preset depending on a measured temperature of a gearbox component and/or of a lubricant for the gearbox.

Claims

1. A method for starting up a wind energy plant after an operation stoppage, wherein the wind energy plant has a gearbox in the drive train and an operation management which can control at least one operational variable B significant for the strain of the gearbox of the wind energy plant to a desired value B_Soll, wherein after the operation stoppage, the desired value B_Soll is limited by a maximum value B_Max, which is preset depending on a measured temperature of a gearbox component and/or of a lubricant for the gearbox.

2. A method according to claim 1, characterised in that one of the operational variables B significant for the strain of the gearbox is the electric power generated by the wind energy plant.

3. A method according to claim 1, characterised in that one of the operational variables B significant for the strain of the gearbox is a torque in the drive train of the wind energy plant.

4. A method according to claim 1, characterised in that the temperature T of the lubricant in an oil pan or an oil line of the gearbox is measured.

5. A method according to claim 1, characterised in that the start-up is ended when the measured temperature T corresponds to a certain operation temperature.

6. A method according to claim 1, characterised in that the maximum value B_Max is increased after an operation stoppage, until it reaches a rated value B_Nenn of the wind energy plant at a certain temperature T₂.

7. A method according to claim 1, characterised in that the maximum value B_Max has an initial value B_Frei when the wind energy plant is started up.

8. A method according to claim 1, characterised in that the maximum value B_Max is kept constant up to a presettable temperature T₁ after starting up the wind energy plant.

9. A method according to claim 1, characterised in that the maximum value B_Max is preset to be proportional to the temperature T in a period.

10. A method according to claim 9, characterised in that the maximum value B_Max is preset to be proportional to the temperature T between the temperatures T₁ and T₂.

11. A method according to claim 1, characterised in that the wind energy plant is started up only when a minimum value B_min of the operational variable B significant for the strain of the gearbox is to be expected.

12. A method according to claim 1, characterised in that it is not fallen below a minimum value B_min of the operational variable B significant for the strain of the gearbox when the wind energy plant is started up.

13. A wind energy plant with a gearbox in the drive train, at least one temperature sensor for measuring a temperature T of a gearbox component and/or of a lubricant for the gearbox and an operation management, which can control at least one operational variable B of the wind energy plant significant for the strain of the gearbox to a desired value B_Soll, wherein the operation management has an equipment for establishing a maximum value B_Max depending on a temperature T established by the at least one temperature sensor, and wherein the operation management can preset the maximum value B_Max for the limitation of the desired value B_Soll.

14. A wind energy plant according to claim 13, characterised in that one of the operational variables B significant for the strain of the gearbox is the electric power generated by the wind energy plant.

15. A wind energy plant according to claim 13, characterised in that one of the operational variables B significant for the strain of the gearbox is a torque in the drive train of the wind energy plant.

16. A wind energy plant according to claim 13, characterised in that the at least one temperature sensor is arranged in an oil pan or an oil line of the gearbox.

17. A wind energy plant according to claim 13, characterised in that the operation management can end the start-up when the measured temperature T corresponds to a certain operation temperature.

18. A wind energy plant according to claim 13, characterised in that the equipment for establishing the maximum value B_Max can increase the maximum value B_Max after an operation stoppage, until it reaches a rated value B_Nenn of the wind energy plant at a certain temperature T₂.

19. A wind energy plant according to claim 13, characterised in that the equipment for establishing a maximum value B_Max can preset an initial value B_Frei when the wind energy plant is started up.

20. A wind energy plant according to claim 13, characterised in that the equipment for establishing a maximum value B_Max can keep the maximum value B_Max constant up to a presettable temperature T₁ after starting up the wind energy plant.

21. A wind energy plant according to claim 13, characterised in that the equipment for establishing a maximum value B_Max can preset the maximum value B_Max to be proportional to the temperature T in a period.

22. A wind energy plant according to claim 21, characterised in that the equipment for establishing a maximum value B_Max can preset the maximum value B_Max to be proportional to the temperature T between the temperatures T₁ and T₂.

23. A wind energy plant according to claim 13, characterised in that the operation management can start up the wind energy plant selectively only when a minimum value B_min of the operational variable B significant for the strain of the gearbox is achievable.

24. A wind energy plant according to claim 13, characterised in that the operation management can control the wind energy plant when starting up such that it is not fallen below a minimum value B_min of the operational variable B significant for the strain of the gearbox.