Wind farm with autonomous phase angle regulation

A method for operating a wind farm comprising a plurality of wind energy installations which each have a generator driven via a rotor with a converter for generating electrical energy and are connected to a farm-internal network that connects the wind energy installations to a collecting station, wherein a central transmission line for connection to an energy transmission network is connected to the collecting station, wherein a phase angle is a measure of a phase shift between current and voltage in the farm-internal network, and wherein the wind energy installations each have a controller for active/reactive power that acts on the respective converter depending on the phase angle, the method comprising:

• generating a dedicated coordinate system in the wind farm via an autonomous reference angle generator,
• defining a reference angle for an active and reactive axis in the farm network based on the generated dedicated coordinate system,
• externally controlling, in terms of phase, the converters of at least some of the wind energy installations by virtue of a reference angle generated by the reference angle generator being applied to the active/reactive power controller of the respective wind energy installation via a signal line.