Relating to the determination of rotor imbalances in a wind turbine
First Claim
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1. A method of improving balance of a rotor of a wind turbine, the method including;
- selecting a rotor blade pair from a plurality of rotor blades coupled to the rotor;
receiving blade load data associated with each of the plurality of rotor blades, the blade load data comprising;
a blade loading of each of the plurality of rotor blades,a speed of the rotor, anda wind speed;
determining a pitch imbalance of the rotor associated with the selected rotor blade pair, the pitch imbalance based on a difference between blade load data associated with the selected rotor blade pair and blade load data associated with another rotor blade pair of the plurality of rotor blades; and
determining and applying pitch control inputs to one or both rotor blades of the selected rotor blade pair to reduce the pitch imbalance of the rotor.
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Abstract
A method and system for improving the balance of a rotor in a wind turbine, including; determining blade load data associated with a selected rotor blade pair; determining, based on the blade load data, pitch imbalance data associated with the selected rotor blade pair, wherein the pitch imbalance data associated with a rotor blade pair is based on measurements of at least blade loading, rotor speed and wind speed; and, determining and applying pitch control inputs to one or both of the selected rotor blade pair in order to reduce the severity of the rotor imbalance.
16 Citations
10 Claims
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1. A method of improving balance of a rotor of a wind turbine, the method including;
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selecting a rotor blade pair from a plurality of rotor blades coupled to the rotor; receiving blade load data associated with each of the plurality of rotor blades, the blade load data comprising; a blade loading of each of the plurality of rotor blades, a speed of the rotor, and a wind speed; determining a pitch imbalance of the rotor associated with the selected rotor blade pair, the pitch imbalance based on a difference between blade load data associated with the selected rotor blade pair and blade load data associated with another rotor blade pair of the plurality of rotor blades; and determining and applying pitch control inputs to one or both rotor blades of the selected rotor blade pair to reduce the pitch imbalance of the rotor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A wind turbine system comprising a rotor having a plurality of rotor blades, each of the rotor blades being equipped with blade load sensing means and a blade pitch control means, the system further comprising a controller configured to:
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select a rotor blade pair from the plurality of rotor blades; receive blade load data associated with each of the plurality of rotor blades, the blade load data comprising; a blade loading of each of the plurality of rotor blades, a speed of the rotor, and a wind speed; determine a pitch imbalance of the rotor associated with the selected rotor blade pair, the pitch imbalance based on a difference between blade load data associated with the selected rotor blade pair and blade load data associated with another rotor blade pair of the plurality of rotor blades; and determine and apply pitch control inputs to one or both rotor blades of the selected rotor blade pair to reduce the pitch imbalance of the rotor.
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Specification