Analysis of the influence of temperature on the operating mode of a photovoltaic solar station

Abstract

Abstract In this paper, the influence of overheating on the performance of photovoltaicmodules was evaluated. The experimental observation was carried out on the basis of a 20 kW photovoltaic station with 60 photovoltaic modules. It was found that an increase in the number of solar cells with overheating in the photovoltaic module leads to an increase in output power losses. The temperature of the Feb is one of the main factors that determine the electrical parameters of the Feb and its efficiency in General. An increase in the SE temperature leads to a decrease in the band gap, which gives a slight increase in the photocurrent due to the expansion of the photo-response spectrum into the long-wave region. However, this increase in photocurrent does not compensate for the decrease in Uoc and the filling factor of the load characteristic FF due to an exponential increase in the saturation current with increasing temperature, which leads to a significant decrease in efficiency with increasing temperature.The width of the band gap of semiconductors decreases with increasing temperature, and the absorption edge shifts to the region of lower energies.Continuous analysis of the presence of "hot spots" and replacement of defective modules during the initial period of operation can increase the output power and shelf life of the photovoltaic system.