Method for stabilising a rotor of a wind turbine
AssigneeVestas Wind Systems A/S
InventorAnders Druedahl THURLOW
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Abstract
The present invention relates to a method for stabilizing a rotor of a wind turbine during a time period following an abnormal grid event, the method comprising the steps of detecting an occurrence of the abnormal grid event, reducing an allowable rotor thrust from a first thrust limit to a second thrust limit, detecting that the abnormal grid event has ended, and maintaining the second thrust limit a selected time period after the abnormal grid event has ended. The present invention further relates to a wind turbine controller and a computer program product for performing this method.
Claims19
A method for stabilizing a rotor of a wind turbine during a time period following an abnormal grid event, the method comprising the steps of:
- detecting an occurrence of the abnormal grid event;
- reducing an allowable rotor thrust from a first thrust limit to a second thrust limit;
- detecting that the abnormal grid event has ended;
- and
- maintaining the second thrust limit a selected time period after detecting that the abnormal grid event has ended.
A control system for stabilizing a rotor of a wind turbine during a time period following an abnormal grid event, the control system comprising:
- an arrangement for detecting an occurrence of the abnormal grid event, and for detecting that the abnormal grid event has ended;
- and
- a controller for reducing an allowable rotor thrust from a first thrust limit to a second thrust limit during at least part of the abnormal grid event, and for maintaining the second thrust limit a selected time period after the abnormal grid event has ended.
(canceled)
A computer program product for performing an operation when the computer program product is run on a microprocessor of a control system of a wind turbine;
- the operation, comprising:
- detecting an occurrence of the abnormal grid event;
- reducing an allowable rotor thrust from a first thrust limit to a second thrust limit;
- detecting that the abnormal grid event has ended;
- and
- maintaining the second thrust limit a selected time period after detecting that the abnormal grid event has ended, thereby stabilizing a rotor of the wind turbine.
Dependencies are inferred from the claim text.