Virtual Inertia Controller for the Grid Interfacing Inverter of Wind Energy System

Today's power system comprises of conventional as well as non-conventional renewable sources like wind, solar etc. The integration of these renewable energy sources has resulted in a reduced inertia of the grid, which causes the frequency instability in the system. A novel controller whose functioning is similar to that of a synchronous generator has been designed. This controller is capable of extracting the kinetic energy stored in the blades of the wind turbine and maintain the required amount of inertia in the power grid as a result the frequency deviation problems are reduced. The enhancement in performance of the system in presence of this novel controller is tested under different cases such as sudden increase/decrease in large loads, faults etc.