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Simulation study on the degradation process of photovoltaic modules

机译：光伏组件降解过程的仿真研究

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摘要

Degradation decreases photovoltaic power delivery capacity over time. Studies on photovoltaic degradation are usually based on accelerated tests or filed tests which are time-consuming and require much effort. This paper investigates the degradation process of photovoltaic modules by simulation studies. A circuit-based model is employed to describe photovoltaic characteristics to environmental conditions and to the aging factors of photovoltaic modules, Analysis of each aging factor shows that the decrease of short-circuit current, the main reason of power loss, is mainly caused by optical degradation. The decay of fill factor mainly due to degradation of parasitic resistances worsens the power output. The statistical analysis of photovoltaic characteristic parameters based on a great number of photovoltaic modules with the same technology indicates that the degradation process can be very complicated depending on the degradation patterns of aging factors. Generally, the power loss tends to increase and the mismatch among photovoltaic modules becomes more remarkable through the time.
机译：随着时间的推移，降解会降低光伏发电能力。光伏退化的研究通常基于加速测试或现场测试，这既耗时又需要大量努力。本文通过仿真研究来研究光伏组件的降解过程。采用基于电路的模型来描述光伏特性对环境条件和光伏组件老化因子的影响，对每个老化因子的分析表明，短路电流的减少是造成功率损耗的主要原因，其主要原因是光电降解。填充系数的下降主要是由于寄生电阻的降低而导致的，这会使功率输出恶化。基于大量采用相同技术的光伏组件对光伏特性参数的统计分析表明，取决于老化因子的退化模式，退化过程可能非常复杂。通常，随着时间的流逝，功率损耗趋于增加并且光伏模块之间的失配变得更加明显。

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