基于暂态零序电流法的站内电缆监测系统及验证试验  

Cable monitoring system and verification test in substation based on transient zero-sequence current method

作　　者：倪辉 田禄 李奇超 牛勃 NI Hui;TIAN Lu;LI Qichao;NIU Bo(Power Research Institute of State Grid Ningxia Electric Power Co.,Ltd.,Yinchuan Ningxia 750011,China)

机构地区：[1]国网宁夏电力有限公司电力科学研究院,宁夏银川750011

出　　处：《宁夏电力》2020年第3期8-13,共6页Ningxia Electric Power

摘　　要：及时发现变电站内电力电缆的故障对保证变电站安全稳定运行具有重要意义。介绍了1种基于暂态零序电流法的站内电缆监测系统,对系统的监测原理和各部件参数要求进行了论述,并采用单相失压模拟试验和人工单相接地试验对电缆线路监测系统进行了验证。试验结果表明,该系统可以准确地采集电缆线路故障发生时的暂态零序电流,并能及时将故障报警信息上报运维人员,保证变电站安全稳定运行。Timely detection of power cable fault in substation is of reuse significance to ensure safe and stable operation of substation. A cable monitoring system based on transient zero sequence current method is introduced. The monitoring principle of the system and the parameter requirements of each component are discussed,and the single-phase voltage loss simulation test and artificial single-phase grounding test are used to verify the cable line monitoring system. The test results show that the system can accurately collect the transient zero sequence current when the cable line fault occurs,and timely report the fault alarm information to the operation and maintenance personnel to ensure the safe and stable operation of the substation.

关 键 词：电缆监测 暂态零序电流 广域同步 接地试验 

分 类 号：TM247[一般工业技术—材料科学与工程]