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

Claim 11:
12. A controller, comprising:
a memory containing instructions;
a processor communicatively coupled to the memory and, which when programmed with the instructions, performs an operation of operating a wind turbine generator comprising a rotor having a plurality of blades, the operation comprising:
comparing an indicated rotor speed with a rotor speed target to determine a rotor speed error;
generating a modified rotor speed error by applying a control factor to the rotor speed error;
controlling a pitch angle of each blade via a pitch control system in accordance with the modified speed error;
altering the control factor in dependence on a size of the indicated rotor speed; and
decrementing the control factor when the indicated rotor speed is in a first range of rotor speeds, and wherein decrementing comprises decreasing the control factor 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.