有变频器的低压供电系统漏电闭锁技术  

Lockout technology of low voltage power supply system with frequency converter

作　　者：林星齐 王彦文[1] 韩晋阳 范琛涛 姜波 黄志鹏 伍晟焘 LIN Xingqi;WANG Yanwen;HAN Jinyang;FAN Chentao;JIANG Bo;HUANG Zhipeng;WU Shengtao(School of Mechanical,Electrical and Information Engineering,China University of Mining&Technology(Beijing)Beijing 100089,China)

机构地区：[1]中国矿业大学(北京)机电与信息工程学院,北京100089

出　　处：《电气应用》2021年第9期88-92,共5页Electrotechnical Application

摘　　要：以具有变频器的井下低压供电系统为研究背景,着重研究现有磁力起动器中漏电闭锁技术的不足。根据三相异步电动机的结构与工作原理,以掘进机为例,深入研究其瞬间断电时产生反电动势的持续时间,为磁力起动器漏电闭锁技术提供延时参考依据,从而缩短延时时间,提升井下供电系统的安全性。研究了矿用变频器对于电动机反电动势的影响,并通过Simulink仿真来验证理论结果。Based on the underground low-voltage power supply system with frequency converter,paper focuses on studying the shortcomings of the current leakage lockout technology in the magnetic starter.Based on the structure and working principle of the three-phase asynchronous motor,takes the roadheader as an example to deeply study the duration of the back-EMF generated by its instantaneous power failure,which provides a delay reference for the leakage lockout technology in the magnetic starter,thereby has short delay time and improved safety of the underground power supply system.

关 键 词：变频器 漏电闭锁 反电动势 附加直流 

分 类 号：TD611[矿业工程—矿山机电] TM921.51[电气工程—电力电子与电力传动]