Adaptive Pitch Control for Variable Speed Wind Turbines

摘要

An adaptive for adjusting blade (312) pitch angle angle, and controllers (350) implementing such method, for achieving higher power coefficients. Average power coefficients are determined for first and second periods of operation for the wind turbine (310). When the average power coefficient for the second time period is larger than for the first, a pitch increment, which may generated based on the power coefficients, is added (or the sign is retained) to the nominal pitch angle value for the wind turbine (310). When the average power coefficient for the second time period is less than for the first, the pitch increment is subtracted (or the sign is changed). A control signal is generated based on the adapted pitch angle value and is sent to blade pitch actuators (318) that act to change the pit angle of the wind turbine (310) to the new or modified pitch angle setting, and this process is iteratively performed.