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高压电器  2015 

特殊结构110 kV GIS气室器件耐压及MOA泄漏电流试验

, PP. 121-126

Keywords: GIS,PT,MOA,耐压,泄漏电流

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Abstract:

为了发现气体绝缘全封闭组合电器GIS器件绝缘缺陷,需要对GIS进行验收试验或定期预防性试验。试验过程中,由于机械结构原因,通过常规手段对某些气室的盆式绝缘子及开关无法进行耐压,金属氧化物避雷器(MOA)泄漏电流试验难以实现。提出电磁式电压互感器(PT)的3倍频感应耐压试验方法,对特殊结构110kVGIS气室器件进行耐压,并测量MOA在持续运行电压下的交流电流分量。试验过程中,计算分析了容升电压、分布电容等影响因素,并测得一次侧尾端电流、二次侧电流与补偿电抗量的规律。现场试验结果证明了所提试验方法的可行性。

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