Photovoltaic System Equipped with a DC/DC Buck Converter and a MPPT Command Ensuring an Optimal Functioning Independently of System Perturbations

In this paper, we analyze the conception, the realization, and the characterization of a photovoltaic system (PV) equipped by a DC/DC buck converter and an analogical MPPT controller provided with detection circuit of dysfunction and convergence of the system (CDCS). We demonstrate that The CDCS circuit ensures an optimal functioning of the PV panels independently of variations of the weather conditions (illumination, temperature,…) and the load. From the modeling of the optimal functioning of PV panels and the complete system in the Pspice simulator, we showed the good functioning of the PV system conceived and realized in this work. During whole days of functioning, we showed that the efficiency of the converter is very satisfactory (about 80 %) and the electric power losses of the PV panel are lower than 8 %.