WIND TURBINE CONTROL SYSTEM AND METHOD

A wind turbine control system and method, for the type of wind turbines includes a rotor, an asynchronous generator driven by the rotor and configured for providing an active power to a grid, and a power converter connected to the generator and configured to interact with the generator for generating the required active power for the grid. The control system includes a converter control unit for controlling the power converter and for estimating a frequency derivative of the frequency of the grid, and a wind turbine controller configured for receiving the estimated frequency derivative and for considering the received frequency derivative for determining a synthetic inertia. The converter control unit controls the power converter to cause the generator to also provide the synthetic inertia, in the form of active power.