摘要
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 mean-time, 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.
出处
《浙江电力》
2013年第1期14-16,共3页
Zhejiang Electric Power
关键词
非直接接地
消弧线圈
电压不平衡
indirect grounding
arc-suppression coil
voltage imbalance
