Patent ID: 11927173
Assignee: SIEMENS GAMESA RENEWABLE ENERGY A/S
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 0:
1. A method for compensating an imbalance of a wind rotor of a wind turbine, the method comprising
applying at least two test-offsets, one after the other, to a parameter characterizing a state of the wind rotor, wherein the imbalance depends on the parameter;
measuring for the at least two test-offsets an acceleration of the wind turbine, wherein the acceleration depends on the imbalance; and
determining a compensation-offset based on the acceleration, wherein the imbalance is at least partially compensated, when the compensation-offset is applied to the parameter, wherein determining the compensation-offset comprises;
determining, for each of the at least two test-offsets, a frequency component of a frequency spectrum of the acceleration,
mapping each of the frequency components to a coordinate system,
determining a center defined by each of the frequency components, wherein the center is defined as a center of gravity of a geometric shape defined by each of the frequency components, and
calculating the compensation-offset based on the center, wherein the parameter comprises a plurality of blade parameters, each characterizing a different blade of a plurality of blades of the wind rotor, wherein each blade parameter comprises a blade pitch.