双面太阳能组件辐照度模型的优化

Optimization of Solar Radiation Model for Bifacial PV Modules

为有效分析固定倾斜安装的多排双面太阳能组件背面辐照度,通过视觉因子辐照度模型分析,将行间距为D的地面划分为n段,并区分阴影区和非阴影区,经过对地面接收散射辐照度的视觉因子,及各电池接收地面反射视觉因子的修正,实现了组件背面辐照度模型改进。模拟与实验结果表明:在某晴朗天气下,倾斜角为26°,离地高度为1.5 m,行间距为4 m,组件长度为1.7 m,地面反射率为30%时,双面组件获取的总辐照度较单面组件增益为18.98%,模型与测量辐照度误差为0.68%。

For the purpose of effective analysis on rear irradiance of multi-row bifacial photovoltaic module arrays fixed with constant slope angle,a key operation for modifying back side irradiance model of bifacial photovoltaic modules in existence is that a distance of D is divided into n segments with distinguishing shaded and unshaded regions.Subsequently,modified model is achieved by optimizing view factors of diffusion irradiance and reflective irradiance.The simulation and experiments results show that the total radiation of bifacial photovoltaic modules obtained a gain of 18.98%relative to signal photovoltaic modules in the condition of a clear weather,together with the slope angle of 26°,the height from the ground of 1.5 m,the distance between rows of 4 m,the length of the module of 1.7 m,and the reflectivity of the ground of 30%.Moreover,the irradiance gain error could be controlled only 0.68%in the condition of aforementioned.