Dimensioning of a hybrid photovoltaic-electricity grid installation: Case of the computer rooms of the IST of Mamou, Guinea

The objective of this research is to propose a technical and economically viable solution to efficiently and sustainably power the computer rooms of the Higher Institute of Technology of Mamou using a hybrid photovoltaic-electric grid installation. This research will contribute to optimizing the use of solar energy and reducing electricity consumption from the grid, while improving the resilience and sustainability of IT installations. During this research, we used two (2) sizing methods, namely: the manual method based on empirical formulas and the method using HOMER software. These two methods led to several results, the main ones being: Concerning photovoltaic solar: one hundred and ninety-two (192) 500WC panels for an installed power of 96,000 WC; one hundred and forty-four (144) 200 Ah batteries for an installed capacity of 28,800 Ah; two converters (Sunny boy and Sunny Island) with a power of 107 kW each and the EDG electrical network of 29,604 kWh/year: The annual production of electrical energy of the entire hybrid system is 171,665 kWh, of which 29,604 kWh for the electrical network supplied by the Garafiri hydroelectric power plant (75 MW) for a voltage level of 110kV/30kV, or 13%. According to our analyses, this research shows that the use of renewable energy sources such as photovoltaic solar energy coupled with the electrical network via a hydroelectric power plant remains the best optimal solution for providing clean and less polluting energy to an isolated site in general and that of Guinea in particular, whose hydroelectric potential is estimated at 6000 MW and very considerable solar irradiation