Patent ID: 7372173

Claim:
A wind farm with at least two wind turbines ( 1 , 2 , 3 , 4 ) connected to a power grid, further comprising a coupling device ( 7 ) for coupling the wind farm to the power grid, a sensor element ( 8 ) for sensing a first variable representative of said wind farm, wherein said sensor element ( 8 ) is adapted to transmit said measured first variable to said coupling device ( 7 ), a control unit ( 5 ) connected to said at least two wind turbines ( 1 , 2 , 3 , 4 ), and a sensor unit ( 6 ) connected to said power grid and said centralized control unit ( 5 ), wherein said sensor unit ( 6 ) is adapted to measure the grid frequency of said power grid and to transmit said measured grid frequency to said control unit ( 5 ), and wherein said coupling device ( 7 ) is adapted to control a second variable of said wind farm according to said measured first variable, and wherein said control unit ( 5 ) is adapted to control the output of real power of said wind farm according to said measured grid frequency.