Patent ID: 8332077

Claim:
A controller for a wind farm including a plurality of wind turbine generators, the wind turbine generators being controllable in rotation frequency and pith of blades of the wind turbine generators, and the wind turbine generators coupled to a grid through a transmission line, the controller comprising: a plurality of anemometers, each disposed at a wind turbine generator, the anemometers configured to measure wind directions and wind speeds at the wind turbine generators; a plurality of local controllers, each disposed at a wind turbine generator, the local controllers configured to transmit operation information, including the measured data wind directions and wind speeds, through a communication network, to receive output commends, and to respectively control each wind turbine generator; and a central controller configured to receive the operation information from the local controllers through the communication network, to compute variation in output power of the wind turbine generates on the basis of the received operation information, and to generate and to transmit output commends to the local controllers to control the wind turbine generators on the basis of the computed variation; wherein each of the wind turbine generators is individually controlled based on wind speed variation thereof; and wherein when controlling the wind turbine generators to generate a predetermined constant power output from the wind farm, and when a combined power output from all wind turbine generators is less than the constant power output, then a wind turbine generator having a relatively higher reserve capacity than other wind turbine generators is controlled to take a relatively higher portion of the combined power output.