Fuzzy Logic-Based Grid-Interactive Photovoltaic System Design, Simulation, and Implementation

Abstract

This paper aims to demonstrate a system with design, simulation, and execution of a fuzzy-logic-based control approach for a three-phase grid-connected photovoltaic (PV) system. The system incorporates a three-level voltage source inverter (VSI) with a transformer less topology and a DC-DC boost converter to enhance efficiency. A fuzzy logic controller (FLC) is used to regulate inverter voltage and Maximum Power Point Tracking (MPPT). The model was designed and evaluated using MATLAB/Simulink. By analyzing the simulation results, a three-phase output of 204.12 V synchronized with the grid at 50 Hz, achieving a high-power factor (PF) of near unity, low total harmonic distortion (THD) of <5%, and an efficiency of 98.3 % were found. This work confirms the ability of fuzzy logic-based control in enhancing power supply operation and guaranteeing a secure PV network.