Patent ID: 8676392

Claim:
An operation control method for a wind-power generation system comprising a plurality of individual wind turbines and a central controller for providing control commands to the individual wind turbines, output powers of the individual wind turbines being supplied to a utility grid via a common interconnection node, the operation control method comprising: a step of calculating power factor correction levels corresponding to the individual wind turbines on a basis of reactance components present between the individual wind turbines and the interconnection node; a step of storing the calculated power factor correction levels in association with the individual wind turbines in a memory; a step of detecting a reactive power and an active power at the interconnection node; a step of calculating an actual power factor at the interconnection node using the detected reactive power and the detected active power; a step of calculating a difference between the calculated actual power factor and a predetermined power-factor command value for the interconnection node; a step of obtaining the power factor correction levels in association with the individual wind turbines from the memory; and a step of determining power-factor command values corresponding to the individual wind turbines by correcting the predetermined power-factor command value for the interconnection node using the calculated difference and the power factor correction levels obtained from the memory.