Method and system for operating a wind turbine during a fault

摘要

A method and a system for operating a wind turbine (10) during a fault. The system includes a pitch motor for rotating each rotor blade (18), second pitch sensors (72) for determining when the rotor blade (18) is rotated to a set point, and a backup pitch controller (80). After a fault is detected, the method determines whether the wind speed in the vicinity of the wind turbine (10) is less than or greater than or equal to a maximum rated velocity of the wind turbine (10). The backup pitch controller (80) then rotates the rotor blades (18) to a specific set point based on the determination.

主权项

1. A method for responding to faults in a control system in a wind turbine including a rotor coupled to at least one rotor blade, at least two pitch sensors coupled to the rotor blade, at least one pitch drive, and a controller communicatively coupled to the pitch sensors and the pitch drive, said method comprising:
determining, with the controller, that a fault has occurred in the control system; determining, with the controller, a speed of wind in the vicinity of the wind turbine; rotating the rotor blade using the pitch drive to a set point if the wind speed is greater than or equal to the maximum rated velocity of the wind turbine, the set point being an angular position of the rotor blade where the rotor blade is feathered; applying a brake to prevent further rotation of the rotor blade once the rotor blade is rotated to the set point; releasing the brake when the controller determines that the fault in the control system is cleared and the wind speed is less than the maximum rate velocity of the wind turbine; and returning control of the rotation of the pitch drive to the controller to facilitate continued operation of the wind turbine.