唐轶;陈庆;

• 1:中国矿业大学信电学院
• 2:中国矿业大学信电学院 江苏省徐州市221008
• 3:江苏省徐州市221008

摘要(Abstract)：

当非直接接地的配电网发生单相接地故障时,大部分情况下故障电流的稳态分量较小或为0,导致许多基于稳态分析的小电流接地选线装置的选线效果不理想。作者分析了6kV模拟电网的大量实验数据,得到电弧接地故障时故障线路与非故障线路零序暂态电流的特征。在此基础上提出用各线路零序暂态电流相互点积积分平均值的正负来判断故障电流的方向,并采用一个时间段的积分平均值作为判断量,有效地提高了故障选线的准确性和可靠性。该方法计算量较小,能在单片机上实现,并具有在线纠错能力,对中性点不接地或经消弧线圈接地的电网均有效。

关键词(KeyWords)： 配电网;小电流接地选线;单相接地故障;电弧接地故障;零序电流;暂态分量

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 唐轶;陈庆;

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DOI:

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