电流互感器暂态饱和特性的实证分析  

Empirical analysis on transient saturation characteristic of current transformer

作　　者：段建东[1] 雷阳 金转婷 张小庆[3] 张宜阳[3] 李云阁[3] DUAN Jiandong;LEI Yang;JIN Zhuanting;ZHANG Xiaoqing;ZHANG Yiyang;LI Yunge(Department of Electrical Engineering,Xi＇an University of Technology,Xi＇an 710048,China;Xi＇an Thermal Power Research Institute Co., Ltd. ,Xi＇an 710054, China;State Grid Shaanxi Electric Power Research Institute, Xi＇an 710054, China)

机构地区：[1]西安理工大学电气工程系,陕西西安710048 [2]西安热工研究院有限公司,陕西西安710054 [3]国网陕西电力科学研究院,陕西西安710054

出　　处：《电力自动化设备》2018年第7期207-213,共7页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(50707026);陕西省自然科学基础研究计划资助项目(2014JM7255);陕西省重点学科建设专项资金资助项目(5X1201);陕西省教育厅服务地方专项计划项目(2013JC24);强电磁工程与新技术国家重点实验室(华中科技大学)开放课题基金资助项目(2018KF001)~~

摘　　要：针对电力系统中的P级电流互感器的暂态饱和问题,模拟了330 kV/110 kV短路系统中电流互感器的工作情况。在高达48 kA的暂态通流下,利用探究性试验讨论并实证分析了电流互感器的暂态饱和特性。面向暂态饱和特性的应用层面,试验中还连接了差动继电保护装置,讨论了继电保护误动作情况;根据指标暂态系数,给出了保护用P级电流互感器选择的判断依据。在实际电流互感器暂态特性的实证分析下,所得结论为系统投运中的P级电流互感器安全稳定工作问题提供了参考基础。Aiming at the transient saturation problem of P-level CT（ Current Transformer） in power system,the operation of CT in 330 kV/110 kV short circuit system is simulated. Under the transient flow up to 48 kA,the transient saturation characteristics of CT are discussed and empirically tested by exploratory tests. For the application of transient saturation characteristics,the differential relays are also considered in the experiment for the misoperation analysis of relay protection. According to the transient coefficient,the judgment basis for the selection of P-level CT for protection is given. Under the actual empirical analysis of the CT transient characteristics,the obtained conclusions give a reference basis for the safety and stability of the P-level CT in the system operation.

关 键 词：P级电流互感器 暂态饱和 大电流试验 饱和特性应用 

分 类 号：TM452[电气工程—电器]