脉冲电流选线技术对故障电弧的影响

范松海; 陈坤燚; 肖先勇; 刘小江

范松海,陈坤燚,肖先勇,刘小江.脉冲电流选线技术对故障电弧的影响[J].电测与仪表,2018,55(10):8-13.
Fan Songhai,Chen Kunyi,Xiao Xianyong,Liu Xiaojiang.Effects of method for fault line selection based on pulse currenton fault arc[J].Electrical Measurement & Instrumentation,2018,55(10):8-13.

脉冲电流选线技术对故障电弧的影响

Effects of method for fault line selection based on pulse currenton fault arc

DOI：

中文关键词: 故障选线脉冲电流选线消弧线圈中性点非有效接地系统

英文关键词:fault line selection, fault line selection based on pulse current, arc suppression coil, non-effectively grounded neutral

基金项目:

作者中文名	作者英文名	单位
范松海	Fan Songhai	国网四川省电力公司电力科学研究院
陈坤燚	Chen Kunyi	四川大学
肖先勇	Xiao Xianyong	四川大学
刘小江	Liu Xiaojiang	国网四川省电力公司电力科学研究院

摘要点击次数: 1591

中文摘要:

脉冲电流选线技术需要短时改变中性点接地方式,接地方式的改变会给故障电弧熄灭带来负面的影响。针对故障电弧自行熄灭的条件,研究了电弧熄灭后故障点电压的恢复情况,结果表明,接地方式的改变可能加快故障点电压的恢复速度,增加电弧熄灭后复燃的几率。为了避免脉冲电流选线技术对电弧熄灭的不利影响,提出了改变接地方式的合理时间范围并给出了相应的计算方法；另外,指出了添加限流电阻可以减小对电弧熄灭的不利影响。

英文摘要:

The method for fault line selection based on pulse current must change grounding mode of neutral point in short period. The negative effects on extinction of fault arc are produced by the change of grounding mode. According to the extinction conditions of fault arc, recovery voltage of fault point has been researched. Results show voltage recovery rate may become fast and the probability of arc re-striking may be increased because of the change of grounding mode. To avoid the negative effects produced by method for fault line selection based on pulse current, the time ranges suitable for changing grounding mode and its computing method are proposed. In addition, the negative influences on fault arc can also be reduced by adding current limiting residence.

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