Method and arrangement for responding to a grid event, such as fast frequency drop, by combining demand response, inertial response and spinning reserve

It is described a method (100) for controlling a wind power plant, in particular in case of a frequency drop in a utility grid to which the wind turbines are connected, the method comprising: Combining demand response, inertial response and spinning reserve for given wind speeds in order for wind power plants to deliver fast aggregate under frequency response for a wide wind speed range with minimal recovery time and minimal production loss at each wind speed.