Design and realization of a photovoltaic system equipped with MPPT command and detection circuit of the dysfunction and convergence the system (CDCS)

In this paper we have analyzed the design, realization and optimization of a photovoltaic (PV) system provided with MPPT command and detection circuit of dysfunction and reconvergence the system (CDCS) to the new maximum power point (MPP) following a perturbation due to weather variation (solar irradiation, temperature, ..) and the load. The results obtained show very good agreement between simulation and experiment. The experimental system realized during cloudy days or by varying the load, shows that it operates under optimum conditions independently of meteorological variations. At each perturbation the system detects it and CDCS reconvergence the system without restart it. The good efficiency of the DC-DC (about 90 %) converter used and the low loss (less than 7%) shows that the system realized can be used in a PV installation to minimize losses due to connecting the panels to the load and in particular to minimize the cost of the installation.