This study shows a simulation with the HOMER software of a hybrid system composed exclusively of renewable energy sources including a solar photovoltaic generator of 50 kW, a 50 kW wind generator and a 50 kW biogas generator linked to a 50 kW converter in Blekoum (rural area of the Abengourou region) fed to date by a 42 kVA diesel generator with a 5000 liters tank. After having modelled the load to satisfy and integrated the wind potential, the sunshine and the biomass residue potential, we carried out the calculation with HOMER. From the three scenarios of hybrid systems after optimization by HOMER, it is appear that, with regard to energy production, the hybrid system produces an average value of 277.364 kWh/year while the 42 kVA generator produces 105.108 kWh/year. The average price per kWh per year one is 481 172.453 FCFA for the hybrid system and 401 491.799 FCFA for the diesel generator. The emissions of gaseous pollutants are very high with the diesel generator where the values of CO2 are raised to 142.933kg/year; CO at 353 kg/year and SO2 at 287 kg/year while the hybrid system allows to preserve our climate by lowering these values respectively CO2 to 33.533 kg/year; CO to 1.261 kg/year and SO2 to 0 kg/year.