CONTROL DEVICE FOR WIND POWER GENERATION DEVICE, WIND POWER GENERATION SYSTEM, AND CONTROL METHOD FOR WIND POWER GENERATION DEVICE

摘要

An object is to prevent a situation in which, when a change in the frequency of a utility grid is to be recovered from, an increase or decrease in the generated output power becomes excessive, thus making a wind turbine generator unable to supply electrical power to the utility grid. A wind-curbine control device controls a wind turbine generator in which a rotor having a plurality of blades receives wind and rotates, a generator generates electrical power through the rotation of the rotor, the electrical power is supplied to a utility grid, and electric energy to be supplied to the utility grid can be changed according to a change in the frequency of the utility grid. A subtracter (62) of the wind-turbine control device calculates a frequency change, which is the difference between a measurement value of the frequency of generated output power of the wind turbine generator and a set value of the frequency of the generated output power of the wind turbine generator, and a limiter (66) limits a change in the electrical power corresponding to the frequency change calculated by the subtracter (62), based on the rotational speed of the generator.