A METHOD FOR DECREASING BLADE DEFLECTION DURING TOWER PASSAGE IN A WIND TURBINE
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United States of America
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Issued Date -
Feb 20, 2025
app pub date -
Dec 14, 2022
filing date -
Dec 14, 2022
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Abstract
A method for controlling a wind turbine to decrease blade deflection during tower passage is disclosed. A blade flap moment of the wind turbine blades is measured. A blade flap moment of the wind turbine blades and a rotor tilt moment in a situation where the pitch offset has not been added are estimated, based on the measured blade flap moment. In the case that the estimated blade flap moment exceeds a first activation threshold value and the estimated rotor tilt moment exceeds a second activation threshold value, individual pitch angle adjustment of the wind turbine blades is initiated by adding a pitch offset, at azimuth angles within an azimuth adjustment region corresponding to tower passage of the wind turbine blades.
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