现代电力2011，Vol.28Issue(4)：32-34,3.
某变电站10kV零序电压回路极性问题分析
Research on Polarity Problem of 10kV Zero Sequence Voltage Circuit in Certain Substation
史雷敏 1郭伟伟 1宋庭会 1刘国臣 1黄宜欣1
作者信息
- 1. 河南省电力公司许昌供电公司,河南许昌461000
- 折叠
摘要
Abstract
In order to improve reliability of power equipments, the fault case of fuse melting at higher voltage side of voltage transformer in 10kV substation is investigated and analyzed in this paper.Then the polarity problem of 10kV zero sequence voltage circuit is analyzed, and zero sequence voltage space vectorgraph is given.The abnormal conditions of zero sequence secondary voltage that generally occurs in power system are summarized, and the cause of fuse melting at voltage transformer high-voltage side is found to be the wrong polarity for zero sequence secondary voltage circuit.A new method which can verify correctness of polarity for the zero sequence voltage circuit is proposed, and secondary circuits with problems are examined one by one.The results show that the proposed method is simple, practical, safe and effective, which can be applied to inspection process of second protection.关键词
电压互感器/零序电压/接地故障/极性Key words
voltage transformer/ zero sequence voltage/ grounding fault/ polarity分类
信息技术与安全科学引用本文复制引用
史雷敏,郭伟伟,宋庭会,刘国臣,黄宜欣..某变电站10kV零序电压回路极性问题分析[J].现代电力,2011,28(4):32-34,3.
