Partial shading effect of photovoltaic modules with bypass diode simulation.

The production of renewable energy depends on weather conditions. In the case of a photovoltaic generator the partial shading considerably reduces its output power capacity and can even cause the destruction of part or all of a panel. Once shaded, a cell is operating in reverse bias and it acts as a charge and dissipates energy, then the cell can be irreversibly damaged, we usually called these hot spot phenomena. In order to avoid this possible phenomenon, manufacturers have resorted to the use of bypass diodes and anti-return diodes. In this paper, we present a simulation of the shading effect of a photovoltaic generator composed of panels mounted in series and in parallel. We will compare the characteristics of power voltage (P-V) for different irradiances in the presence and absence of bypass diode. For the simulation, we will use the single diode model. The simulation is performed under PSIM software