A Real-Time PSO MPPT Strategy Combined with Backstepping Control for Grid Connected Photovoltaic System

Hajar Dammah, Nabil Arsalane, Bouassam Hamid, Omar Cherrak

This paper considers the problem of controlling a single-phase grid-connected photovoltaic (PV) system using a Particle Swarm Optimization (PSO)-based MPPT strategy combined with a nonlinear backstepping controller. The system consists of a PV panel, a DC–DC boost converter, a half-bridge DC–AC inverter, and an L filter for grid connection. The proposed approach aims to achieve three main objectives: maximum power extraction from the PV system, unity power factor operation by ensuring a sinusoidal grid current in phase with the grid voltage, and stable DC-link voltage regulation. The stability of the overall control scheme is analyzed, and the effectiveness of the proposed method is evaluated through MATLAB/Simulink simulations and validated using a Processor-in-the-Loop (PIL) implementation.