广东电力2016，Vol.29Issue(1)：113-118,6.DOI:10.3969/j.issn.1007-290X.2016.01.022
10kV电网单相接地故障引起电压互感器损坏的原因分析
Reason for Voltage Transformer Damage Caused by Single Phase Grounding Fault of 10 kV Power Grid
车卫红 1陈润颖 1刘国荣 1金圆 1王树朋2
作者信息
- 1. 国网长沙供电公司，湖南 长沙 410015
- 2. 武汉大学 电气工程学院，湖北 武汉 430072
- 折叠
摘要
Abstract
Voltage transformer (VT)damage caused by single phase grounding of 10 kV power grid happens occasionally in neutral point ungrounded system.Therefore,this paper introduces influence mechanism of single phase grounding on VT damage by establishing equivalent circuits of two transient processes at the time of single phase grounding fault and after e-liminating the fault,so as to analyze influencing factors for causing VT heating and carry out emulation proof.Results indi-cate that main influencing factors of single phase grounding fault causing VT heating are respectively initial phase angle and remanence at the time of the fault happening,and initial phase angle and line length when the fault disappearing.关键词
单相接地/电压互感器/过渡过程/影响机理/中性点接地Key words
single phase grounding/voltage transformer/transient process/influence mechanism/neutral point grounding分类
信息技术与安全科学引用本文复制引用
车卫红,陈润颖,刘国荣,金圆,王树朋..10kV电网单相接地故障引起电压互感器损坏的原因分析[J].广东电力,2016,29(1):113-118,6.
