Modélisation et simulation d’une chaine de conversion photovoltaïque.

Abstract

The integration of photovoltaic (PV) systems into the electrical grid faces numerous technical challenges, including the reliable and efficient export of energy to the grid while ensuring energy quality requirements. In this context, the objective of this work is to significantly contribute to the improvement and optimization of a PV system connected to a distribution grid. To achieve this, MPPT (Maximum Power Point Tracking) algorithms are applied to optimize the energy production at the source. Subsequently, a VOC (Voltage Oriented Control) is implemented on the DC/AC converter using PSO optimization technique for both classical PI and FOPI regulators, ensuring a better connection to the grid. Mathematical models of the system components have been developed and validated through simulation using MATLAB/Simulink. According to the obtained simulation results, it has been observed that the VOC control strategy using the PSO-FOPI regulator meets the performance criteria in terms of rapidity, stability and precision with an optimized total harmonic distortion (THD) rate. These results demonstrate the efficiency and reliability of the proposed system.