Patent ID: 8215906
Filing Date: 2012-07-10
Classification: F03D,F05B,Y02E

Abstract:
1. A method for controlling a wind turbine having torsionally compliant blades driving a variable speed rotor mechanically coupled to a generator, the torsionally compliant blades having an induced twist larger than one degree at or below rated power, the method comprising: measuring a tip speed ratio and a blade pitch of the torsionally compliant blades at or below rated power; measuring a twist distribution and a blade loading of the torsionally compliant blades at or below rated power; comparing the measured tip speed ratio and blade pitch at the measured twist distribution and blade loading to determine a below-rated power pitch and generator torque schedule; and adjusting generator torque, blade pitch, or a combination thereof in response to the below-rated power pitch and generator torque schedule, the adjusting providing increased energy capture of the wind turbine.