Patent ID: 11879425
Assignee: GE INFRASTRUCTURE TECHNOLOGY LLC
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 14:
15. A wind turbine, comprising:
rotor blades on a rotatable rotor hub;
one or more sensors located to detect wind parameters of wind impacting the rotor blades;
a pitch system configured to change a pitch angle of the rotor blades;
a controller in operable communication with the pitch system;
wherein with the rotor hub in a standstill idling state free to rotate, the controller is configured to:
determine a minimum revolution rate of the rotor blades that prevents vibrations of the rotor blades;
determine that the revolution rate of the rotor blades is below the minimum revolution rate;
determine if one or more wind parameters for wind impacting the rotor blades are above a threshold limit;
determine that grid power is available to the wind turbine;
based on the wind parameters, determine a pitch angle for one or more of the rotor blades to increase rotation of the blades to at least the minimum revolution rate;
issue a pitch command to the pitch control system to pitch the rotor blades to the pitch angle; and
wherein the rotor blades are pitched to increase the revolution rate of the rotor blades prior to vibrations being induced in the rotor blades.