An Improved Maximum Power Point Tracking for Photovoltaic Distributed Energy System Associated with a Shunt Active Power Filter

Nowadays, an important interest in decentralized energy production in multi-sources systems is taking place in everyday life generally and in electrical power engineering domain particularly. In this paper, the optimal architecture proposed with two stages includes a PV source generator connected to the electrical grid through two level converters: a DC/DC converter and a DC/AC converter. The microgrid formed also feeds a non-linear load polluting the network harmonically along with the converters. The dimension study and control proposed in this paper ensure the global correct functioning of the system. First, the quadratic boost converter is controlled using a novel MPPT algorithm based on adaptive P&O that proved its superiority to the latter in rapid changing climatic conditions. Then, a shunt active power filter (SAPF) is employed with a direct power control (DPC) technique guaranteeing the rejection of harmonic currents and the transfer of the active power to the electrical network. The results presented proved with high efficiency and great robustness, in Simulink/MatlabTM environment, the ability of the global system to inject the active power of the PV generator to the grid, to contribute in improving the quality of electrical energy at the connection point and to adapt correctly to load variation.