Two-Stage Three-Phase Photovoltaic Grid-Connected Inverter Simulation System

This paper presents a two-stage three-phase photovoltaic grid-connected inverter simulation system. The system implements front-stage Maximum Power Point Tracking (MPPT) and rear-stage inversion using Space Vector Pulse Width Modulation (SVPWM) control algorithms. The photovoltaic grid-connected inverter functions as a device that converts direct current (DC) generated by solar panels into alternating current (AC). The front-stage MPPT employs perturbation and observation algorithms (P&O) or incremental conductance methods in code implementation to ensure photovoltaic panels operate at maximum efficiency, delivering optimal power output. The rear-stage SVPWM control algorithm - implemented through Clarke/Park transformations and voltage vector sector calculations - serves as a widely-used inversion technique that converts DC input to AC output with high power conversion efficiency. Through this simulation system, engineers can model and evaluate various photovoltaic panel configurations and control strategies, optimizing performance and efficiency of photovoltaic power generation systems. Code implementation typically involves MATLAB/Simulink blocks for MPPT logic and SVPWM waveform generation with carrier-based modulation techniques.