Analysis of output power change of polycrystalline silicon solar power generation system considering temperature factor

摘要

In order to improve the quality of polysilicon solar power generation system, the output power variation of polysilicon solar power generation system with temperature factor is analyzed in the present paper. The functions of photoelectric current, series resistance, parallel resistance, and temperature are obtained through the current and voltage display equations of solar cells, and the mathematical model of photovoltaic connection circuit in the series/parallel solar power generation system is established. The quadratic interpolation method is used to track the maximum output power of the series/parallel solar power generation system. The influence of temperature on the key parameters such as the maximum output power, the maximum photoelectric efficiency mode output power, and the constant voltage mode output power of the PV/T system composed of polysilicon photovoltaic cells is analyzed. The results show that when the temperature is different, the series circuit decreases by 58.08, 58.12, and 50.51%. The maximum output power, maximum photoelectric efficiency mode output power, and constant voltage mode output power of the polysilicon solar power generation system decreased by 2.05, 2.05, and 4.76%, respectively, with the increase of local temperature, and the parallel circuit decreased by 5.31, 8.73, and 50.51%, respectively, in order to improve the power generation quality of the polysilicon solar power generation system.