电力系统自动化Issue(15)：130-135,6.DOI:10.7500/AEPS20140511001
SF6电流互感器内部故障不同接线方式保护动作分析
Analysis of Protection Movements with Different Wiring Mode for SF6 Current Transformer Internal Fault
宋永佳 1温才权 1禤海贞 1李先宁 1吴志宇 1韦鑫1
作者信息
- 1. 中国南方电网超高压输电公司梧州局，广西壮族自治区梧州市 543002
- 折叠
摘要
Abstract
To find out the characteristics of insulation faults,this paper studies the primary insulating structure of SF6 current transformer,and proposes a concept named the equipotential point for analyzing the operation of protection affected by current transformer faults. What has so far been done is:doing a comprehensive research on the requirements of the current transformer equipotential point whatever the installation available, and then abstracting them. Then, summing up the problems of current transformers that cannot meet the requirements of the equipotential point and design habit,and proposing an installation and construction program according to current transformer structure characteristics.This paper studies the relationship between primary winding current and secondary winding current.In the circumstances,the primary and secondary currents are completely out of proportion and may lead to protection malfunction,which is a tremendous impact on the power system.Finally,in face of the current transformer internal fault characteristics,an improvement program for the current transformer primary structure is proposed.关键词
电流互感器/绝缘结构/等电位体/小变比接线方式Key words
current transformer/insulating structure/equipotential point/small ratio connection mode引用本文复制引用
宋永佳,温才权,禤海贞,李先宁,吴志宇,韦鑫..SF6电流互感器内部故障不同接线方式保护动作分析[J].电力系统自动化,2014,(15):130-135,6.
