Enhancement of grid primary frequency response using type 3 and type 4 wecs with virtual inertia control [articol]

Abstract

With proliferation of wind energy, the Variable Speed Wind Turbine inertial response is current research interest. This research work, analyzes Virtual Inertia Control (VIC) technique for VSWT to provide active power support during power imbalance due to sudden load change on large interconnected power system. The traditional maximum power point tracking curve has been modified based on frequency deviation for kinetic energy extraction from VSWT in order to improve primary frequency response of the Grid. The simplified DFIG (Type-3) model, PMSM-FRPC (Type-4) model, IG-FRPC (Type-4) model Wind Turbine Generators (WTGs) with VIC has been aggregated and integrated into two area power systems which include hydro and thermal power plants. The performances of above WTGs are compared under VIC control. The MATLAB/SIMULINK has been deployed to carry out simulation. Simulation results depicted a smooth recovery of rotor speed to optimal value, reduced Rate of Change of Frequency (ROCOF) and improved frequency nadir for effective grid support.