Modeling and Control of a Grid-Connected Photovoltaic System

The purpose of the work was to modeling and control of a grid connected photovoltaic system. The system consists of photovoltaic panels, voltage inverter with MPPT control, filter, Phase Looked Loop (PLL) and three phase grid. The connection of the inverter to the grid is provided by an inductive filter (R, L). The MPPT control is established using Perturb & Observe (P&O) algorithm. A control strategy based on Lyapunov approach is adopted to obtain a Power Factor (PF) equal to 1 and stabilize the grid-connected PV module system. The simulation results have been performed in MATLAB/Simulink® software and show the performance control of photovoltaic systems in different illumination conditions.