Volume 51

A Novel Power Generation Model for Bifacial Photovoltaic Modules Based on Parallel Equivalent Circuits Qiangzhi Zhang, Jinqing Peng, Yimo Luo

Abstract

Using a static bifaciality to simulate the dynamic output power of bifacial photovoltaic (bPV) modules would produce errors. To address the problem, the present study proposed a novel parallel equivalent circuit model based on the single diode model, incorporating the structural characteristics and electrical properties of bPV modules. The results showed that the difference between the novel model and the traditional model increased as irradiance decreasing. When the incident solar irradiance on the module was 100 W/m², the output power simulated by the novel model is 3.3% lower than that of the traditional model and is more aligned with actual conditions. Further analysis showed that the difference between the two models increased with module temperature, though temperature changes have less impact than solar irradiance changes. Additionally, there is a superimposed effect between module temperature and irradiance. When the module temperature is 60 °C and the irradiance is 100 W/m², which significantly differs from the standard test conditions (STC), the simulation results of the novel model are 4.3% lower than those of the traditional model.

Keywords bifacial photovoltaic, power generation, five parameters model, parallel equivalent circuit