Patent ID: 8242619

Claim:
A wind power generation system, comprising: a power generator; a converter configured to convert an output of a rotor of the power generator from a three-phase AC power into a DC power; an inverter configured to convert the DC power outputted from the converter into a three-phase AC power; a power control unit configured to control the converter and the inverter, the power control unit controlling de-actuation and re-actuation of an operation of the converter and the inverter based on one of a rotor current of the power generator and the DC voltage converted by the converter; and a blade control unit configured to control a pitch angle of wind turbine blades, wherein the blade control unit controls: the pitch angle of the wind turbine blades, when the power control unit de-actuates the operation of the converter and the inverter, such that a rotation speed of the power generator becomes equal to or greater than a synchronous rotation speed, and the pitch angle of the wind turbine blades, when the power control unit re-actuates the operation of the converter and the inverter, such that the pitch angle matches a target pitch angle that is determined based on at least one of a wind speed, a rotation speed of the power generator, and a requested output power.