Influence of Shading on Solar Cell Parameters and Modelling Accuracy Improvement of PV Modules with Reverse Biased Solar Cells
Influence of Shading on Solar Cell Parameters and Modelling Accuracy Improvement of PV Modules with Reverse Biased Solar Cells
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DOI：
10.3390/en15239067
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发表时间：
2022-11
期刊：
影响因子：
3.2
通讯作者：
Abdulhamid Atia;F. Anayi;Min Gao
中科院分区：
文献类型：
--
作者：
Abdulhamid Atia;F. Anayi;Min Gao
本文介绍了一种实验研究的影响，遮光单晶（单晶硅）太阳电池参数。利用该模型计算了单晶硅太阳电池和单晶硅光伏组件在部分遮挡下的等效电路参数随遮挡的变化。结果发现，通过考虑单细胞模型中的参数变化与阴影的模拟没有导致建模精度的显着改善。然而，对于PV模块，当考虑模型中的所有参数变化时，在反向偏置区域中的建模精度得到了显著改善。进行了进一步的调查，以确定负责改进的关键参数。结果表明，除了光生电流，分流电阻也有显着的模型精度的影响。因此，提出了一种建模方法，除了光生电流的变化外，还包括分流电阻随阴影的变化。使用单晶硅光伏组件对这种方法进行了实验验证。结果表明，所提出的方法是更准确的，相比的方法，只考虑光生电流的变化，而不需要包括雪崩击穿项。
This paper presents an experimental investigation on the influence of shading on mono-crystalline (mono-Si) solar cell parameters. The variations of equivalent circuit parameters with shading were determined and then used in modelling a mono-Si solar cell and a mono-Si photovoltaic (PV) module under partial shading. It was found that the simulation by considering the parameter variations with shading in the single cell model did not lead to a noticeable improvement in modelling accuracy. However, for the PV module, a significant improvement in modelling accuracy in the reverse bias region was achieved when considering all parameter variations in the model. A further investigation was performed to identify the key parameters that are responsible for the improvement. The results revealed that in addition to the photo-generated current, the shunt resistance also has a significant effect on the model accuracy. A modelling approach was thus proposed, which includes the variation of the shunt resistance with shading, in addition to the variation of the photo-generated current. This approach was experimentally validated using a mono-Si PV module. The results show that the proposed approach is more accurate, compared to the approach that considers only the variation of the photo-generated current, without the need to include an avalanche breakdown term.