矿井无轨架线辅助运输系统漏电检测方案  

Electric Leakage Detection Scheme for Mine Trackless Trolley Auxiliary Transportation System

作　　者：郭志俊 GUO Zhijun(China Coal Technology ＆ Engineering Group Taiyuan Research Institute Limited Company,Taiyuan 030006,China)

机构地区：[1]中国煤炭科工集团太原研究院有限公司,山西太原030006

出　　处：《煤矿安全》2018年第7期112-115,共4页Safety in Coal Mines

基　　金：煤炭科学研究总院科技创新基金资助项目(2016ZYZD001)

摘　　要：针对无轨架线辅助运输系统环节众多,漏电检测相互干扰,定位不准的问题,通过分析各子系统的电路组成和结构,分别提出了交直流供配电系统、架空接触网、架线电驱车辆的漏电检测方法,介绍了一种长达几千米的直流接触网漏电检测方案。研究结果表明:交流高低压回路采用选择性漏电保护,整流能馈回路采用差流法漏电保护,接触网回路采用补偿切换电桥漏电保护,架线车辆采用二次绝缘加母线绝缘检测,可以实现漏电分级断电保护,减小故障范围。Aiming at the problems of many parts of the trackless trolley auxiliary transportation system and mutual interference of electric leakage detection and incorrect positioning, the AC-DC power supply and distribution system, overhead contact network and wired electric vehicle leakage detection method were proposed respectively by analyzing the circuit components and structure of each subsystem. And a kind of direct current contact line leakage detection scheme which is several kilometers in length was introduced emphatically. The results showed that exchange high and low voltage circuits using selective leakage protection, rectifier feed-back circuit using differential current leakage protection, contact network circuit using the compensation switching bridge leakage protection, and the wired vehicle using secondary insulation and bus insulation test can achieve leakage grading power protection and reduce the fault range.

关 键 词：漏电检测 漏电闭锁 单极漏电 双极漏电 运输系统 

分 类 号：TD525[矿业工程—矿山机电]