Design and Modelling of a 6kW Grid-Connected Photovoltaic System - AC Stage

In this paper, the grid-side of a grid-connected Photovoltaic (PV) system is designed, modelled and simulated using Matlab/Simulink environment. The developed model implements all components for synchronizing the PV system with the grid; these components are a three-phase Voltage Source Inverter (VSI), a grid filter, grid synchronization and VSI controller. Each component of the system is modelled, simulated and validated. Then, the controller of complete PV system is designed to simulate many scenarios under various grid and weather conditions. The simulation results show that, the model is simple, reliable, stable and suitable for studying the grid-connected PV system. The model achieves various control strategies and operates under various weather conditions successfully and accurately.