Wind turbine generator system, control apparatus therefor, and control method therefor

A control apparatus applied to a wind turbine generator system in which output powers of a plurality of wind turbines are supplied to a utility grid through a common connection point, the control apparatus for the wind turbine generator system comprising:

• a wind turbine classifying unit for classifying, when an output power increase request is notified from the utility grid side during output power reducing operation, the plurality of the wind turbines into a first wind turbine group that does not satisfy a rated wind speed condition and a second wind turbine group that satisfies the rated wind speed condition;
• a target setting unit for setting a target output power after reception of the output power increase request;
• a first controlling unit for releasing, for the wind turbines of the first wind turbine group, the output power reducing operation and causing the wind turbines of the first wind turbine group to perform an output power corresponding to a wind condition;
• and
• a second controlling unit for supplementing a first deviation, which is a difference between a total output power of the first wind turbine group and the target output power, with an output power from the wind turbine of the second wind turbine group.