The authors report on the light- and elevated temperature-induced degradation (LeTID) effect observed on bifacial photovoltaic modules and its potential impact on photovoltaic plants performance. Indoor LeTID quantification using indoor carrier-induced degradation (CID) is carried out using current injection. Power measurements yielded higher LeTID sensitivity for the rear side of bifacial modules compared to the front side, hence leading to a variation of the bifaciality factor by several percentage points. The difficulty in evaluating the maximal power degradation caused by LeTID is also highlighted as a reduced number of samples are used most of the time and as cells within a single module do not have always the same performance evolution trends. Using indoor CID results with the help of empirical fitting and Arrhenius relation, the yield impact of LeTID on a bifacial power plant is simulated under three different climates. Modeling results help to identify the main parameters related to LeTID modules sensitivity that impact photovoltaic (PV) plants yield: maximal power degradation, stabilized power value after regeneration, activation energy value, and LeTID kinetics. In some cases, the yield variation caused by LeTID sensitive modules could be mitigated by carefully selecting the modules as a function of climatic conditions.

中文翻译：

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使用加速老化测试、电致发光和光伏电站建模，光和高温诱导的退化对双面组件的影响

作者报告了在双面光伏组件上观察到的光和高温诱导退化 (LeTID) 效应及其对光伏电站性能的潜在影响。使用室内载波诱导退化 (CID) 的室内 LeTID 量化是使用电流注入进行的。与正面相比，功率测量为双面模块的背面提供了更高的 LeTID 灵敏度，因此导致双面系数变化了几个百分点。评估由 LeTID 引起的最大功率下降的困难也突出显示，因为大多数时间使用的样​​本数量减少，并且单个模块中的电池并不总是具有相同的性能演变趋势。借助经验拟合和 Arrhenius 关系，使用室内 CID 结果，在三种不同气候下模拟了 LeTID 对双面电厂的产量影响。建模结果有助于确定与影响光伏 (PV) 发电厂产量的 LeTID 模块灵敏度相关的主要参数：最大功率衰减、再生后的稳定功率值、活化能值和 LeTID 动力学。在某些情况下，可以通过根据气候条件仔细选择模块来减轻由 LeTID 敏感模块引起的产量变化。