变压器铁心及夹件接地电流在线监测装置  

Online monitoring device for transformer core and clamps grounding current

作　　者：王兵 陈益萍 徐华生 梁开任 WANG Bing;CHEN Yiping;XU Huasheng;LIANG Kairen(Yulin Power Supply Bureau of Guangxi Power Grid Co.,Ltd.,Yulin,Guangxi 537000)

机构地区：[1]广西电网有限责任公司玉林供电局,广西玉林537000

出　　处：《电气技术》2023年第6期69-73,78,共6页Electrical Engineering

摘　　要：电力变压器是电能运输与电力变换的重要设备,变压器是否正常工作影响着电网的安全运行。电力变压器运行时出现多点接地故障或局部放电故障都会危害电网的运行安全。因此,本文设计一种变压器故障信息融合监测装置,通过监测变压器铁心及夹件接地线上的工频电流及高频脉冲电流信号,分析电力变压器是否发生故障,并判断故障类型。装置可将监测的电流信息进行本地显示和短信预警等,实现对变压器多点接地故障和局部放电故障的双重监测预警,保证电网的安全运行。Power transformer is an important equipment for electric energy transportation and power conversion.Its operation affects the safe operation of power grid.The multi-point grounding fault and partial discharge fault of power transformer harm the safety of power grid.Therefore,a transformer fault information fusion monitoring device is designed in this paper.Through monitoring the power frequency current and high frequency pulse current signal of the transformer core and the ground line of the clamp,it is analyzed that whether the power transformer has a fault and what kind of fault is.The device can monitor the current information for local display and SMS early warning,thus realizing the transformer multi-point grounding fault and partial discharge fault double monitoring and early warning and ensuring the safe operation of the power grid.

关 键 词：变压器铁心及夹件 接地电流 在线监测 

分 类 号：TM41[电气工程—电器] TM862