Protection of the photovoltaic (PV) systems by a dysfunction detection circuit of the PV system (DDCS)

LETAS, Department of Physics, Faculty of Science, University Mohamed the First, Oujda 60000, Morocco. ___________________________________________________________________________________ Abstract: In this paper, we analyze the design and the realization of a photovoltaic system (PV system) provided with a digital MPPT regulator and a dysfunction detection circuit of the PV system (DDCS). The role of the MPPT regulator is to control the solar Battery charging status when PV panel works around the maximal power point (MPP). The DDCS Circuit detect the dysfunction of the PV system following the failure of the MPPT regulator control and connect the PV panels directly to the load (battery, network, ...). The experimental and the simulated (Optimum) results show firstly, the smooth functioning of each block of the PV system and secondly, the detection of any dysfunction of the MPPT regulator and the connection of panels to the load. The load is directly supplied by the energy provided by the PV panels during the failure of the MPPT regulator.