基于温声混合法的环网柜电缆接头故障在线监测装置  

On-line monitoring device for cable joint fault of ring main unit based on temperature sound hybrid method

作　　者：何锋 陈益凡 陈振勇 黄汉权 宋佳佳[2] He Feng;Chen Yifan;Chen Zhenyong;Huang Hanquan;Song Jiajia(Putian power supply company of State Grid Fujian Electric Power Co.,Ltd.Putian 351100;Key Laboratory of Jiangsu power transmission and distribution equipment technology,Hohai University,Changzhou,Jiangsu 213022)

机构地区：[1]国网福建省电力有限公司莆田供电公司,福建莆田351100 [2]河海大学江苏省输配电装备技术重点实验室,江苏常州213022

出　　处：《现代科学仪器》2021年第6期190-197,共8页Modern Scientific Instruments

基　　金：2019年福建省电力有限公司科技计划项目(52132019015P)。

摘　　要：环网柜电缆接头由于受安装工艺、使用环境等影响,经常发生电缆接头烧毁的恶性事故。为了及早发现电缆接头故障信息,避免烧毁故障的发生,设计了一种电缆接头故障在线监测装置。该装置通过监测三相电缆接头局部放电声音及声音频谱,以及监测三相电缆接头端盖处温度,实现电缆接头故障的在线监测;并利用无线射频技术传递电缆接头局放声音及温度信息,解决了高低压的物理隔离问题;利用窄截面CT,基于饱和技术限制了大电流,解决了测量传感器的供电问题;基于温声混合法的环网柜电缆接头故障在线监测装置经现场实际应用和测试,解决环网柜电缆接头故障在线监测的难题。该设备对保障电力系统供电安全具有重要的意义。Due to the influence of installation process and using environment,the cable joint of ring main unit is often burnt out.In order to find out the fault information of cable joint as soon as possible and avoid the occurrence of burning fault,an online monitoring device for cable joint fault is designed.The device monitors the partial discharge sound and spectrum of three-phase cable joint,and monitors the three-phase cable connection The temperature at the head end cover realizes the on-line monitoring of cable joint fault,and uses radio frequency technology to transmit the sound and temperature information of cable joint partial discharge,solves the physical isolation problem of high and low voltage,uses narrow section CT,limits the large current based on saturation technology,solves the power supply problem of measuring sensor,and based on the temperature and sound hybrid method,the online monitoring device for cable joint fault of ring main unit is proposed.Through field application and test,it is of great significance to solve the problem of on-line monitoring of cable joint fault of ring main unit,which is of great significance to ensure the power supply safety of power system.

关 键 词：环网开关柜 声波传感器 测温传感器 故障监测 

分 类 号：TM933[电气工程—电力电子与电力传动]