Enhanced DC link voltage control in grid connected PV systems using WSOA tuned PI and HG-SEPIC converter

Grid-connected Renewable Energy Source (RES), mostly those incorporating photovoltaic (PV) panels, meets challenges comprising voltage boosting for effective power transfer and ensuring even DC link voltage. Traditional control schemes frequently face challenges in accommodating varying conditions, ensuing in shortcomings such as overshooting and sluggish response times, which eventually hinder the system's performance. This research aims to address these challenges by proposing advanced control strategy to enhance system performance and reliability. Specifically, a High-Gain Single-Ended Primary Inductor Converter (HG-SEPIC) combined with White Shark Optimization Algorithm assisted Proportional-Integral (WSOA-PI) controller is employed to efficiently manage voltage levels and improve power transfer efficiency. The proposed controller aims to improve settling time and dynamic response outputs, thereby enhancing the overall system performance. MATLAB validation extensively tests the proposed system model to determine its efficiency and performance under varied conditions. Comprehensive evaluations against existing techniques demonstrate superiority of proposed approach, highlighting its potential for practical implementation of grid system connected PV.