Patent ID: 8115331

Claim:
A wind turbine generator, comprising: a nacelle; a rotor; blades; a tower supporting the nacelle; a pitch-angle control mechanism for controlling a pitch angle of the blades on the basis of a blade-pitch-angle command; an accelerometer for detecting the acceleration due to vibrations; a damping unit for calculating a pitch angle of the blades so as to cancel out the vibrations on the basis of the acceleration detected with the accelerometer and for outputting a blade-pitch-angle command for damping; a pitch-angle control unit for calculating a pitch angle of the blades for controlling the output of the wind turbine generator to be a predetermined value on the basis of wind speed, the rotational speed of the rotor, or the output of the wind turbine generator, and outputting a blade-pitch-angle command for output control; and an adder for supplying the pitch-angle control mechanism with a blade-pitch-angle command obtained by combining the blade-pitch-angle command for damping with the blade-pitch-angle command for output control; wherein the damping unit includes a phase compensator for applying a phase compensation by a predetermined amount.