云平,张志祥,刘恒

• 1:阳光电源股份有限公司中央研究院
• 2:合肥工业大学电气与自动化工程学院

摘要(Abstract)：

调研了光伏电站中不同故障和失效类型的多晶硅光伏组件,通过测试获得了组件的I-V特性曲线和红外图像,并从I-V特性曲线中提取了不同故障和失效类型光伏组件的特征;然后通过建立太阳电池的数学模型和失配下的反偏模型,分析了不同故障和失效类型光伏组件的I-V特性曲线,得到以下结论:老化使组件等效串联电阻增加;前板玻璃碎裂使组件I-V特性曲线阶梯段呈现抛物线趋势;电势诱导衰减使组件的开路电压减小;阴影遮挡使组件失配,且I-V特性曲线出现平坦阶梯段;热斑造成组件I-V特性曲线出现折线段。进一步实验后发现,老化可以通过判断光伏组件串联电阻的情况来辨别,热斑可以通过判断电池单元并联电阻的情况来辨别。

关键词(KeyWords)： 光伏组件;失效;I-V特性;故障;特征

Abstract:

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基金项目(Foundation):

作者(Author): 云平,张志祥,刘恒

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