Patent ID: 8504212

Claim:
A windfarm control system including: a windfarm comprising: plural wind power generators whose rotational speeds are variable; plural aerographs disposed in the vicinity of the wind power generators, to measure directions and powers of wind at sites of the wind power generators; and plural local controllers disposed in the vicinity of the wind power generators, to control outputs of the wind power generators by controlling the rotational speeds of the wind power generators; and a windfarm controller for executing the processes of: locating the most windward one of the wind power generators on the basis of the directions and powers of the wind detected by the aerographs; estimating fluctuations of wind velocities at the sites of the wind power generators during a predetermined time period on the basis of the direction and power of the wind at the site of the most windward wind power generator and distances and directions of the other wind power generators measured from the most windward wind power generator; estimating a fluctuation of an output of the windfarm as a whole during the predetermined time period on the basis of the fluctuations of the wind velocities at the sites of the wind power generators; calculating a control level that is a value of the output of the windfarm as a whole whose maintained value is guaranteed during the predetermined time period; obtaining values of the outputs of the wind power generators; calculating outputs of the wind power generators which make the output of the windfarm as a whole equal to the control level, and rotational speeds of the wind power generators which produce the calculated outputs of the wind power generators; and delivering the calculated outputs and rotational speeds of the wind power generators to the local controllers associated respectively with the wind power generators.