Performances optimization from solar radiation to photovoltaic cell

Photovoltaic cells are inherent part of any photovoltaic system. As the need for more efficient clean source of renewable energy becomes paramount, computational modeling of solar radiation by clear sky and of silicon photovoltaic cell is done, in which the electric model of the solar cell is a two diodes circuit. This modeling must depend at the same time on the weather characteristics of the site where the system is installed and the physical parameters of the corresponding solar cell. It is essential to know the responses of the solar cell model in function of the radiation change caused by the movement of the sun, the latitude and then the incidence of the site. We established calculation programs using Matlab/Simulink environment which allows us to optimize the solar radiation when the results were been compared to these experimental of the NREL (National Renewable Energy Laboratory), we used the obtained radiation to trace the characteristics and to predict the development of the electrical power delivered by the silicon photovoltaic cell in the various meteorological and physical conditions. The prediction of the numerical models is satisfactory, the results obtained are plotted and they are in good conformity with that of literature.