Design and Realization of an Autonomous System Equipped with a Charge/Dischargeregulatorand Digital MPPT Command

In this article, we present the results related to the design, the realization and the experimentation of an autonomous PV system equipped with a solar regulator and digital MPPT command. The solar regulator controls the state of charge of batteries, and in the same time the energy supplied by photovoltaic panels is optimized to the maximum independently of weather. This late function is ensured by a DC/DC converter of Boost-type and a digital MPPT command based on the use of a microcontroller. The results obtained during days with weather perturbations, showed the robustness of the PV system (stability, optimal functioning of PV panels), the good control of charge of batteries under the maximum of energy supplied by the PV panels, according to three phases, determinate the state of charge and the protection against the overcharge and the deep discharge.