Performance Enhancement of Grid-Connected Renewable Energy Systems Using UPFC

No one denies the importance of renewable energy sources in modern power systems terms sustainability and environmental conservation. However, due to their reliance on change, they are unreliable systems. This paper uses a Unified Power Flow Controller (UPFC) enhance reliability performance grid-tied system consists two sources, namely photovoltaic cells (PV) wind turbines (WTs). The UPFC was selected for its unique advantage both active reactive control. is controlled with an optimized Fractional Order Proportional–Integral–Derivative (FOPID) controller. parameters this controller were tuned using Atomic Search Optimization (ASO) algorithm. Simulation results confirm efficiency suggested supporting hybrid during some disturbance events including voltage sag, swell, unbalanced loading. In addition, quality can be improved through reducing total harmonic distortion. It worth mentioning that maximum point tracking techniques had been included PV WT separately. MATLAB/SIMULINK 2021a software used model system.