黄驾驾,刘东红
HUANG Jia-jia,LIU Dong-hong(Yiwu Power Supply Bureau

• 1:义乌市供电局

摘要(Abstract)：

非直接接地系统常采用消弧线圈补偿系统单相接地故障电流,有效减少出线因单相接地导致的电缆故障概率,但同时三相电压不平衡现象(即虚假接地)也有所增加。通过相关计算分析,指出三相负荷不平衡触发消弧线圈补偿系统动作是造成虚假接地的原因,由此提出了应对措施。
Indirect grounding system often uses arc-suppression coil to compensate single-phase ground fault current to effectively reduce the probability of power cable fault caused by single-phase grounding.In the meantime,it increases three-phase voltage imbalance(hereinafter referred to as virtual grounding).By calculation and analysis,the paper indicates that three-phase voltage imbalance is caused by arc-suppression compensation action due to hereinafter referred to as virtual grounding.Hence,the paper proposes the countermeasures.

关键词(KeyWords)： 非直接接地;消弧线圈;电压不平衡
indirect grounding;arc-suppression coil;voltage imbalance

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 黄驾驾,刘东红
HUANG Jia-jia,LIU Dong-hong(Yiwu Power Supply Bureau

DOI: 10.19585/j.zjdl.2013.01.005

参考文献(References)：

• 要焕年.电力系统谐振接地[M].北京:中国电力出版社,2000.
• 刘万顺.电力系统故障分析[M].北京:中国电力出版社,2009.
• 郭为金,蔡源.发电机消弧线圈的补偿方式[J].华东电力,2003(10):87-88.
• DL/T 620-1997交流电气装置的过电压保护和绝缘配合[M].北京:中国电力出版社,1997.