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Investigation and modeling of long-term mismatch loss of photovoltaic array

机译：光伏阵列长期失配损耗的研究与建模

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Many studies have been conducted to analyze and reduce mismatch loss (MML) in photovoltaic array. They have concluded that MML is typically less than 1% at installation and the economic loss is insignificant. In this study, long-term MML effect on photovoltaic array is explored quantitatively. An outdoor test has been conducted to verify that MML is increasing over time for a string of photovoltaic modules. The electrical parameters of the modules in the string are measured at the standard test condition (STC) before installation and after the exposure of 5.5 years. MML is estimated and compared for the data by two approaches; using a stochastic model and string simulating by a SPICE program. It is confirmed from the two methods that MML increases over time. Long-term MML model is developed based on the test data and several results from previous studies. The model expected that the MML keeps increasing over time and is substantial to the output of a solar power plant. The study reveals that MML could be a detrimental factor to the long-term maintenance of solar power plant. (C) 2018 Elsevier Ltd. All rights reserved.
机译：已经进行了许多研究来分析和减少光伏阵列中的失配损耗（MML）。他们得出的结论是，安装时MML通常小于1％，经济损失微不足道。在这项研究中，定量研究了长期MML对光伏阵列的影响。已经进行了一项室外测试，以验证对于一系列光伏模块，MML随时间增加。在安装之前和暴露5.5年后，在标准测试条件（STC）下测量灯串中模块的电气参数。通过两种方法估计并比较MML的数据；使用随机模型和SPICE程序模拟字符串。从这两种方法可以确认，MML随时间增加。基于测试数据和先前研究的一些结果，开发了长期MML模型。该模型预期MML会随着时间的推移而不断增加，并且对太阳能发电厂的输出至关重要。该研究表明，MML可能是太阳能电站长期维护的不利因素。 （C）2018 Elsevier Ltd.保留所有权利。

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