A method of operating a windfarm connected to an electric grid via a point of injection for injecting power from the windfarm to the electric grid, the windfarm including at least two generating units and a windfarm controller, the method comprising:

measuring 302 voltage and/or frequency characteristics of an electrical signal of the electric grid at the point of injection,
communicating 304 to at least two generating units of the at least two generating units of the windfarm at least one control signal based at least in part on the measured voltage and/or frequency characteristics of the electrical signal of the electric grid at the point of injection, the at least one control signal being indicative of a grid situation at the point of injection;
controlling 306 the at least two generating units of the at least two generating units of the windfarm at least in part based on the communicated at least one control signal.