Patent ID: 11885303
Assignee: VESTAS WIND SYSTEMS A/S
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 10:
11. A control system for a wind turbine generator comprising a rotor having a plurality of blades, the control system being configured to:
compare an indicated rotor speed with a rotor speed target to determine a rotor speed error;
generate a modified rotor speed error by applying a control factor to the rotor speed error;
control a pitch angle of each blade in accordance with the modified speed error;
alter the control factor in dependence on a size of the indicated rotor speed; and
decrement the control factor when the indicated rotor speed is in a first range of rotor speeds, wherein decrementing the control factor comprises decreasing by a first decrement when the indicated rotor speed is inside the first range of rotor speeds and is greater than the rotor speed target, and decreasing the control factor by a second decrement when the indicated rotor speed is inside the first range of rotor speeds and is less than the rotor speed target.