Patent ID: 8299650
Filing Date: 2012-10-30
Classification: F03D,F05B,H02P,Y02E

Abstract:
1. A wind turbine generator, comprising: a wind turbine rotor having a plurality of blades and rotatable upon receiving wind thereon, a generator configured to be driven by rotation of the wind turbine rotor, for generating and supplying power to a utility grid, a determination unit for deriving a gradient of a change in output power of the generator and for determining whether the output power of the generator is reduced or increased on the basis of the derived gradient; a control unit for performing power control in response to a drop in a frequency of the utility grid, on the basis of a determination result of the determination unit; and a chargeable secondary battery, wherein the control unit is configured to, in response to the drop in the frequency of the utility grid and a determination by the determination unit that the output power of the generator is reduced, perform control so as to compensate for the difference between the output power of the generator and the power required by the utility grid with at least one of an inertial force accumulated in the wind turbine rotor and power charged in the secondary battery.