Patent ID: 11939959
Assignee: VESTAS WIND SYSTEMS A/S
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 0:
1. A method for controlling a wind turbine, the wind turbine comprises a rotor with one or more pitch adjustable rotor blades, wherein the method comprises:
storing pitch angles for each of the pitch adjustable rotor blades, the pitch angles being sequentially sampled continuously across at least a fraction of a revolution of the rotor for each rotor blade;
generating a stored pitch angle signal for the one or more pitch adjustable rotor blades from the stored pitch angles;
determining at least one periodic component of the stored pitch angle signal;
generating a rotor stop signal to stop the rotor; and
in response to the generating a rotor stop signal, controlling the pitch adjustable rotor blades towards a feathering position using a pitch control signal containing the at least one periodic component.