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SF6局部放电分解组分长光程红外检测

, PP. 70-76

Keywords: SF,红外吸收光谱法,分解气体,局部放电,气体池

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Abstract:

GIS内SF6局部放电分解组分情况与其绝缘状态有着密切联系,监测分解气体组分可诊断出GIS内部的绝缘缺陷。由于SF6分解产物浓度很低,为提高检测限,基于怀特池原理,利用三个凹面反射镜组成共轭系统来实现光路的多次反射,在有效地增加了光程长的同时尽量减少了光能损耗,设计了与傅里叶变换红外光谱仪匹配的20m光程长气体池。分别用长短光程气体池进行SF6局部放电分解组分的红外检测,对比分析发现,20m长光程气体池检测组分种类多,精度和信噪比高,设计的长光程气体池可以实现GIS内部SF6局部放电分解组分的定量研究。

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