Analysis on secondary single-phase grounding short circuit fault of voltage transformer

被引：0
|
作者：
Qin, Tao [1 ]
Zhang, Lei [1 ]
Wang, Xiang-Dong [1 ]
机构：
[1] Yinnan Power Supply Bureau, Wuzhong 751100, China
来源：
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | 2010年 / 38卷 / 07期
关键词：
Analysis - Grounding current - Potential transformer - Preventive measures - Secondary voltage - Short-circuit fault - Single phase grounding - Voltage transformer;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
When single-phase of potential transformer secondary winding grounds, it raises the voltage of the other two non-fault phases. By measuring the impedance of secondary voltage cable and changing the grounding points, this paper analyzes and expatiates the reason is that the N-phase current of secondary electric cable generates voltage to the other two non-fault phases when grounding current affluxes it. The ways of preventing its effection to electric network are extending the section of N-phase electric cable or blocking the overvoltage protection.
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页码：136 / 138
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