矿井低压电缆绝缘在线监测探讨  

Study about On-line Monitoring of Insulating Parameter of Low-voltage Cable

作　　者：陆电[1] 傅周兴[1] 任学海[2] 李磊[1] 

机构地区：[1]西安科技大学电控学院,陕西西安710054 [2]宁波电业局,浙江宁波315000

出　　处：《现代电子技术》2009年第9期130-132,共3页Modern Electronics Technique

摘　　要：中性点不接地是矿井电网普遍采用的工作方式,对电网的绝缘状态进行在线监测,有利于及时发现故障隐患。在分析现有漏电保护装置的基础上,基于Matlab/Simulink的仿真技术,采用附加低频电源法实现在线监测电缆线路绝缘参数,采用该方法可实现分支电缆出线对地绝缘参数的在线监测,还可实现井下电网的选择性漏电保护。A method with non- grounded neutral point is widely used in the power system of mine, the fault line via online insulation monitoring system can be found out. On the basis of analyzing problems existed in the existing leakage protective equipment,the simulation research of insulation parameter online monitoring for mine low voltage cable with additional low frequency signaling based on Matlab simulation technology is adopted and the principle and implementation method of insulation parameter on - line monitoring function are introduced. Elective earth leakage protection can be realized.

关 键 词：绝缘参数 附加低频电源 在线监测 矿井安全 

分 类 号：TM743[电气工程—电力系统及自动化]