This study concerns the implementation of a Mini Smart Grid (MSG) to optimize the use of energy produced by a hybrid PV/Diesel power plant with storage. Since this network has more than two energy sources, an Energy Management System (EMS) is essential to optimize energy distribution between these different sources. An energy management algorithm was developed, and the HOMER Pro modeling and simulation software was used. Five (05) scenarios relating to the combination of the different sources were considered: a complete system (PV Generator, Diesel, Storage, DC/AC converter) called scenario 1, a combination (Diesel Generator, Storage, DC/AC converter) called scenario 2, a combination (PV Generator, Storage, DC/AC converter) called scenario 3, a limitation of the system to Diesel Generator alone which constitutes scenario 4 and finally a last combination (PV Generator, Diesel, DC/AC converter) which is scenario 5. An economic analysis using life-cycle cost and energy cost indicators revealed that the best scenario, in this sense, is scenario 3 (8.12 million FCFA; 10.40 million FCFA). It comes before scenario 1 (12.20 million FCFA; 15.63 million FCFA). This was followed by an environmental pollution analysis. It showed that the most environmentally friendly scenario is scenario 3 because it emits no harmful gases or particles; scenario 1 has very low emissions (2607 kg/year of CO2), it is not perfectly environmentally friendly, but it is acceptable as a system. With population growth, energy intermittency may occur in this system. Scenario 1 will then become the best scenario. The integration of drawdown costs will not affect the results because the scenarios defined as best are also the least polluting.

This work investigated, using a 3-D modelling, the influence of electrons losses on the performance of a polycrystalline silicon PV cell. The electrons transport equations have been solved by taking into account the rate of electrons lost at the junction (Sf0) to find the expression of the electrons’ density which allowed to derive the expressions of the electrical parameters (Jph, Vph, P) then those of the performance parameters (η, Rsh) of the PV cell grain. Then we analyzed, from a numerical simulation, the effects of the rate of electrons lost at the junction (Sf0) on the performance parameters (η, Rsh) found from the curves of output power (PT) -diffusion velocity (Sfj). Results of simulation showed that, in open circuit, there is a leakage current at the junction of the PV cell grain whose density increases from 0 mA.cm-2 à 58.80 mA.cm-2 resulting in a drastic drop in the shunt resistance from infinity to 4.273 Ω.cm 2 and a drop in the conversion efficiency of 34.376%. Considering the manufacturers’ standards, 20% drop in efficiency, so for Sf0 = 1,790×104 cm.s-1 the PV cell is degraded.