Mitigating PCC Harmonic Distortion in Solar-Grid EV Charging Systems with Closed-Loop Control

Abstract

Power quality at the Point of Common Coupling (PCC) and harmonic distortion are major concerns as EVs become more embedded in power systems. A closed-loop PIcontrolled Buck Converter is suggested in this work as a means to manage the charging process and reduce harmonic injection in a hybrid solar-grid electric vehicle charging system. The suggested method optimises power distribution across solar PV, the grid, and the electric vehicle charger by continuously modifying the charging settings to reduce voltage and current distortions. The results show that the closed-loop control stabilizes power flow, improves grid performance overall, and decreases Total Harmonic Distortion (THD). The suggested approach greatly enhances PCC power quality in comparison to conventional open-loop EV charging techniques, rendering it a practical and eco-friendly option for a future EV charging infrastructure.