一种基于直流注入法的低压电网零性线断线检测方法  

A Method of Neutral Wire Disconnection Detection in Low-voltage Power Grid Based on DC Injection Method

作　　者：杞姝 李佳粤 姬魁前 李建纲 陈治廷 周浩然 QI Shu;LI Jiayue;JI Kuiqian

机构地区：[1]云南电网有限责任公司昆明供电局,云南昆明661100

出　　处：《科技创新与应用》2021年第32期101-104,共4页Technology Innovation and Application

摘　　要：低压电网中零性线断线可造成用户电器烧坏,甚至引发火灾,因此有效检测低压电网中性线断线尤为重要。文章首先介绍现有几种检测技术,并分析各技术方案的不足;进一步在低压PT法的基础上引入直流注入法并详细阐述其实现原理;最后,通过实际运行数据验证了直流注入法的有效性。The disconnection of the neutral wire of the low-voltage power grid can cause the user's electrical appliances to burn out and even cause a fire.Therefore,it is particularly important to effectively detect the disconnection of the neutral wire of the low-voltage power grid.This article first introduces several existing detection technologies,and analyzes the shortcomings of each technical solution;further,the paper introduces the realization principle of the DC injection method;and finally,the effectiveness of the DC injection method is verified through actual operating data.

关 键 词：低压配电网 零性线 断线检测 直流注入法 

分 类 号：TM711[电气工程—电力系统及自动化]