Enhancing Power Quality with PDO-FOPID Controller in Unified Power Quality Conditioner for Grid-Connected Hybrid Renewables

Abstract

Addressing the pressing research problem of power fluctuations and grid harmonics in the integration of renewable energy, our  proposed control strategy utilizes the Prairie Dog Optimization Fractional Order Proportional Integral Derivative (PDO-FOPID) controller  within a Unified Power Quality Conditioner (UPQC) system. This innovative approach is tailored to mitigate harmonics and meet load  requirements in grid-connected hybrid renewables. The UPQC system is instrumental in regulating coupling point voltage, countering  voltage and current harmonics to enhance overall power quality. The PDO-FOPID controller dynamically adapts control parameters to system dynamics and load changes, ensuring a stable power supply despite the variability of renewable sources. Simulations in MATLAB/ Simulink confirm its superiority over traditional control strategies, such as PI, sliding mode, and fuzzy control, in harmonics mitigation,  load fulfilment, and power stability. By effectively addressing these challenges, our proposed solution not only contributes to resolving a  critical research problem but also advances the seamless integration of Hybrid Renewable Energy Sources (HRES) into power systems,  thereby enhancing overall grid performance and the efficacy of renewable energy integration.