Patent ID: 8335594

Claim:
A method of operating a wind farm comprising at least three wind turbine generator systems (WEA 1 , WEA 2 , WEA 3 , WEA 4 , WEA 5 ), which is suitable for connection to an electric power network, in which for each of the at least three wind turbine generator systems (WEA 1 , WEA 2 , WEA 3 , WEA 4 and WEA 5 ) at least one actual value (vt 1 (WEA 1 ), . . . , vt 3 (WEA 5 )) for a wind speed and/or for a parameter associated with wind speed is determined, wherein the at least two wind turbine generator systems (WEA 1 , WEA 2 , WEA 3 , WEA 4 , WEA 5 ) are divided by means of an allocation device, at least temporarily, into at least two predetermined groups (G 1 , G 2 , G 3 ), whereby at least one of the groups (G 1 , G 2 , G 3 ) comprises at least two wind turbine generator systems (WEA 1 , WEA 2 , WEA 3 , WEA 4 , WEA 5 ), and wherein each wind turbine generator system of the first group (G 1 ) is assigned at least one first disconnect value (At 1 (G 1 ), At 2 (G 1 ), At 3 (G 1 )), and each wind turbine generator system of the second group (G 2 ) is assigned at least one second disconnect value (At 1 (G 2 ), At 2 (G 2 ), At 3 (G 2 )) which is different from the at least one first disconnect value (At 1 (G 1 ), At 2 (G 1 ), At 3 (G 1 )), and the at least one actual value (vt 1 (WEA 1 ), . . . , vt 3 (WEA 5 )) is assigned to one of the disconnect values (At 1 (G 1 ), . . . , At 3 (G 3 )), and the actual values (vt 1 (WEA 1 ), . . . , vt 3 (WEA 3 )) are compared with the assigned disconnect values (At 1 (G 1 ), . . . , At 3 (G 3 )), and wherein when the assigned actual value (vt 1 (WEA 1 ), . . . , vt 3 (WEA 3 )) exceeds a disconnect value (At 1 (G 1 ), . . . , At 3 (G 3 )), the wind turbine generator system or group of wind turbine generator systems (G 1 , G 2 , G 3 ) which is assigned to the disconnect value (At 1 (G 1 ), . . . , At 3 (G 3 )) is automatically disconnected.