Design, Realization and Optimization of the Photovoltaic Systems Equipped with Analog and Digital MPPT Commands

In this paper, we present experimental results of a photovoltaic system (PV) provided with two analog and digital MPPT commands. The disadvantage of these commands is that they are suffering from divergence problems caused by a sudden change in weather conditions (light, temperature,) or load variations. Therefore, we developed a CDCS circuit for the analog MPPT command to optimize the reliability of PV system independently of weather conditions changes or load variations. The functioning of the PV system during whole days shows a very good agreement between the experiment and the optimal simulation of the electric properties of the PV panel (voltage, current and power). The low losses of electrical energy produced by the PV panel (lower than 5%) and the smooth functioning of the DC/DC converter used (efficiency upper to 80%) reveal the good functioning and reliability of the systems using both types of MPPT commands conceived and realized during this work.