Predict system efficiency of 1 MWc photovoltaic power plant interconnected to the distribution network using PVSYST software

This research is a concept study for a photovoltaic power plant on an Algerian site, this plant is connected to the electrical distribution network of low or medium voltage. It follows that the study of system simulation in its entirety, would be used for this purpose the computer software PVSYST. Our work involves the design of 1 MWc photovoltaic plant in Aïn-melh M´sila where there favorable weather conditions. For system efficiency we compare between structure with a fixed tilt and structure with Seasonal tilt adjustment. The results show that for fixed tilt there is a production of 1805 MWh/year injected into grid with specific energy yield, 1744 kWh/kWc/year and performance ratio, 77.8 %, as for Seasonal tilt there is a production of 1893 MWh/year with specific energy yield, 1829 kWh/kWc/year and performance ratio, 77.8 %. This will allow us recovery about 5% of production compared to fixed tilt plane.