SIMULATION STUDY OF A THREE-PHASE GRID-CONNECTED PHOTOVOLTAIC SYSTEM USING SVPWM TECHNIQUE FOR THE INVERTER

Abstract

This paper presents the design and simulation of a two-stage grid-connected three-phase photovoltaic (PV) system using the MATLAB/Simulink platform. The research focuses on evaluating the performance of the Perturb and Observe (P&O) MPPT algorithm integrated with Space Vector Pulse Width Modulation (SVPWM). Simulation results under varying irradiance conditions demonstrate that the P&O algorithm provides a fast dynamic response while maintaining a stable DC-link voltage at 800 V. Furthermore, the proposed control scheme optimizes the quality of the grid-injected current, achieving a Total Harmonic Distortion (THD) range of 1.89% to 4.17%, which strictly complies with the IEEE Std. 519-2022 requirements. The study confirms that the synergy between P&O and SVPWM effectively enhances the efficiency and reliability of high-power PV systems.