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

Claim 10:
11. A proactive method for preventing vibrations in one or more rotor blades of a wind turbine when the wind turbine is in a standstill idling state with a rotor hub free to rotate, the method comprising:
determining a minimum revolution rate of the rotor blades that prevents vibrations of the rotor blades;
determining that the revolution rate of the rotor blades is below the minimum revolution rate;
detecting one or more wind parameters for wind impacting the rotor blades and determining if the wind parameters are above a threshold limit;
determining that grid power is not available to the wind turbine for pitching the rotor blades;
pitching the rotor blades with a back-up power supply;
determining a least number of the rotor blades to be pitched to achieve the minimum revolution rate; and
pitching only the least number of the rotor blades to achieve the minimum revolution rate.