Mathematical Modeling Of Solar Photovoltaic Panels InThe Matlab/Simulink Environment

Abstract

The paper presents the current state and development prospects of the use of solar photovoltaic (PV) panels in the world and in Uzbekistan, an analysis of scientific research on the mathematical modeling of solar PV panels, and a methodology for assessing the overall efficiency of solar PV panels under variable climatic conditions. A mathematical model of the KC200GT solar module was built in the Matlab/Simulink environment and the results were obtained. Mathematical expressions are given for the dependence of the overall efficiency indicators of solar PV panels on solar radiation, ambient temperature, and the degree of dust accumulation on the surface of the panels. It was determined by the modeling method that at a solar radiation of 1000 W/m² and an ambient temperature of 25 °C the solar PV panel delivers a maximum of 200 W, and at ambient temperatures of 35, 45, and 55 °C the output power is 180, 165, and 148 W, respectively. The change in the output voltage of the solar module with ambient temperature and the change in the output current with solar radiation were studied. It was determined in experiments that at a dust accumulation of approximately 0.1 g/m² on the surface of the solar PV panels the maximum efficiency of the device is 16%, while at 80 g/m² the efficiency decreases to 4%. Based on the research results, the importance of developing energy-saving auxiliary cooling and surface-cleaning devices to increase the efficiency of solar PV panels under variable climatic conditions is stated.