Effect of DFIG Wind Turbines on LFC in a Sliding Mode Controlled Power System

The rise in power demand necessitates the need for renewable energy sources like Wind Energy Conversion System (WECS) linking to the grid. Increasing the integration of wind generation also resulted in an urgent study of frequency control in the power system. This work examines the ability of Doubly Fed Induction Generator (DFIG) based wind turbines to participate in frequency regulation while connected to a multi-area interconnected power system. The aim is to regulate frequency and tie-line digression to zero. The controller put forward for LFC is Sliding Mode Control (SMC). A conventional Integral controller is also executed for the comparison objective. The simulation results reveal that the SMC is superior to that of conventional Integral controller in terms of time-domain stipulations and DFIG wind turbines actively participate in primary frequency supporting operation.