METHOD FOR OPERATING A WIND FARM AND A WIND FARM

A method for operating a wind farm having a string (S-S) of wind turbines (-) which are electrically connectable with each other and a grid () via power connections (Cab-Cd) is disclosed. Each wind turbine includes a rotor () with rotor blades (), and a power conversion system () mechanically connected with the rotor (). The method includes disconnecting the string (S-S) from the grid (), and identifying a primary wind turbine () of the disconnected string (S-S) which is electrically connectable with at least one secondary wind turbine (-) of the disconnected string (S-S). The power conversion system () of the primary wind turbine () includes a reactive power capability (RPC) that at least matches a reactive power (RP) of a cluster (C, C, C) to be formed by electrically connecting the primary wind turbine () with the at least one secondary wind turbine (-) of the disconnected string (S-S).