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Comparative Study of the Electrical Parameters of Individual Solar Cells in a c-Si Module Extracted Using Indoor and Outdoor Electroluminescence Imaging
IEEE Journal of Photovoltaics ( IF 3 ) Pub Date : 2020-09-01 , DOI: 10.1109/jphotov.2020.3001720
Amit Singh Rajput , Yin Zhang , Carlos D. Rodriguez-Gallegos , Ankit Khanna , Prabir Kanti Basu , Srinath Nalluri , Jai Prakash Singh

In this article, electroluminescence (EL) imaging is applied to characterize monocrystalline silicon photovoltaic (PV) modules under indoor and outdoor conditions. EL images of PV modules are analyzed to extract dark saturation current density and series resistance for individual cells within the module. These individual solar cells’ parameters together with the terminal voltages of the modules, are used to model the current–voltage (I–V) characteristics of individual cells and the module using the one-diode model of solar cells and LTspice. We have explored the method for both indoor and outdoor EL images and compared the results with indoor I–V measurements under standard test conditions (STC). The electrical parameters of the PV module estimated using this approach for both, indoor and outdoor EL measurements are in good agreement with a relatively small deviation of less than 3% from the reference measurements performed under STC. This method is particularly useful to extract the electrical parameter and information on module degradation in the field using the EL only, without performing an I–V measurement.

中文翻译:

使用室内和室外电致发光成像提取的 c-Si 模块中单个太阳能电池的电气参数的比较研究

在本文中,电致发光 (EL) 成像用于表征室内和室外条件下的单晶硅光伏 (PV) 模块。分析 PV 模块的 EL 图像以提取模块内单个电池的暗饱和电流密度和串联电阻。这些单个太阳能电池的参数与模块的端电压一起用于模拟单个电池的电流-电压 (I-V) 特性以及使用太阳能电池和 LTspice 的单二极管模型的模块。我们探索了室内和室外 EL 图像的方法,并将结果与​​标准测试条件 (STC) 下的室内 I-V 测量结果进行了比较。使用这种方法估计的 PV 模块的电气参数,室内和室外 EL 测量结果与 STC 下执行的参考测量值的偏差相对较小,小于 3%。这种方法对于仅使用 EL 提取现场模块退化的电气参数和信息特别有用,而无需执行 I-V 测量。
更新日期:2020-09-01
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