Control arrangement of a wind power plant by releasing stored power

A wind power plant comprising a control arrangement, at least one wind turbine and at least one storage arrangement, which control arrangement comprises:

• a first monitoring module configured to determine a first power quantity stored in the rotating mass of the at least one wind turbine;
• a computation module configured to predict a power curve progression during injection of the first power quantity determined by the first monitoring module into a grid and during a subsequent recovery phase;
• a second monitoring module configured to determine a second power quantity available in the at least one storage arrangement;
• and
• a response management module configured to identify, on the basis of the predicted power curve progression determined by the computational model and the second power quantity determined by the second monitoring module, a time instant at which to commence release of the second power quantity in order to maintain the combined output power of the wind power plant at a pre-defined threshold during inertial response following a grid under-frequency event, and wherein the at least one storage arrangement comprises a super capacitor, a battery and/or a flywheel.