Optimal load frequency control of hybrid renewable energy system using PSO and LQR

Abstract

This paper presents the load frequency control of hybrid renewable energy system (HRES) with varying load demand and solar radiation using particle swarm optimization (PSO) based tuned controller and classical state feedback technique like linear quadratic regulator (LQR). To analyze the performance of PSO and LQR on load frequency control, HRES with three component configuration is modeled in MATLAB/SIMULINKR environment. The HRES studied consist a photovoltaic module, a diesel engine generator (DEG) and a battery energy storage system (BESS). Solar radiation and load demand is not constant throughout the day and night. Hence, HRES system requires controllers and other components like DEG and BESS to mitigate the frequency deviation. The optimal frequency deviation response for HRES is obtained using PSO optimized controller and with LQR is compared and presented.