Fuzzy Logic Approach to Improve the Performances of Grid-Connected Photovoltaic Power System

This work focuses on the development of a control strategy of grid-connected photovoltaic power system. The study proposes to compare the use of standard PI type regulators with fuzzy self-tuned PI regulators. This comparison is made for different climatic conditions. In addition, a fuzzy logic MPPT tracker is used to track the maximum power point (MPP) available from PVs array. Simulation results achieved from MATLAB/Simulink environment are presented and discussed to verify the performance of the strategy and the controllers studied. They confirm that the fuzzy logic technique is efficient in terms of accuracy and response time. They allow particularly reducing the harmonic injection rate.