Seagull Optimization in FO-PI Controller of UPQC Integrated Hybrid RES System for Power Quality Improvement

This study focuses on optimized Fractional order PI controller (FOPI), which is integrated into a three-phase hybrid Renewable Energy Storage (RES) system, is to improve the power quality of the system (UPQC). Models are created for RES such PV arrays, BESS, and wind energy with the goal of supplying constant electricity. In general, the BESS can meet the full load demand when the PV array and wind turbine are not providing energy, which improves the distribution power system's stability. The UPQC model with series and shunt active filter compensator exists to reduce the grid's power quality difficulties and harmonics injected by the non-linear loads. In addition, UPQC that is integrated with PV, wind, and BESS can address power quality issues in the case of long voltage disruptions. Therefore, the goal of this research is to create a FOPI controller with iso-damping properties in order to manage the voltage of the DC link at the necessary level. A Seagull Optimization Algorithm (SOA) is used in particular to optimally tune the gain of the FOPI controller (Kp, Ki, λ,). In order to evaluate the results during voltage sag/swell, concerning the total harmonic distortion, the proposed method was implemented in MATLAB/Simulink. It's capable of producing competitive and promising outcomes.