Imbalance estimation for the wind rotor of a wind turbine
AssigneeSiemens Gamesa Renewable Energy A/S
InventorKirk Pierce
Life of this patent
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Abstract
A method for compensating an imbalance of a wind rotor of a wind turbine includes applying at least one test-offset to a parameter characterizing a state of the wind rotor, wherein the imbalance depends on the parameter; measuring for the at least one test-offset an acceleration of the wind turbine, wherein the acceleration depends on the imbalance; and determining a compensation-offset based on the measured acceleration, wherein the imbalance is at least partially compensated, when the compensation-offset is applied to the parameter. Furthermore, a corresponding wind turbine includes a control unit configured to carry out the above method.
Claims14
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.
Dependencies are inferred from the claim text.