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/SIMULINK R 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.
This paper presents the load frequency control(LFC) of two area interconnected power system each comprising of a thermal unit with reheat turbine and a hydro generating unit. In order to have better performance of LFC, proportional-integralderivative(PID) controller is used whose parameters are optimized using particle swarm optimization (PSO) technique. In the present work, effect of AC-DC tie lie on the performance of LFC in two area power system using PSO tuned controllers is tested and compared with the performance of LFC with only AC tie line. It is observed that the transient performance of the system with parallel AC-DC tie line is improved when compared to the performance of the system with only AC tie line. The results obtained are compared and presented.
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