变压器超声波局部放电结合诊断案例分析

Electric Engineering(2017)

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Abstract
针对调节某220kV变电站#1主变有载分接开关档位时电压不发生相应变化的问题,利用超声波局放带电检测技术对变电站主变内部有无异常放电现象进行检测,并结合有载分接开关的内部切换开关芯子与选择器有无正常切换信号的诊断,发现内部传动轴在保护薄弱环节处发生断裂,更换后缺陷消除.
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