电流互感器密封失效引起的绝缘故障

doi:10.11930/j.issn.1004-9649.202004018

中国电力 ›› 2020, Vol. 53 ›› Issue (11): 147-153,174.DOI: 10.11930/j.issn.1004-9649.202004018

电流互感器密封失效引起的绝缘故障

李予全¹, 寇晓适¹, 张少锋¹, 邵颖彪², 赵永峰¹, 朱华¹, 张逸凡¹, 郑含博³

1. 国网河南省电力公司电力科学研究院，河南郑州 450052;
2. 国网河南省电力公司，河南郑州 450052;
3. 广西大学，广西南宁 530000

收稿日期:2020-04-06 修回日期:2020-06-05 出版日期:2020-11-05 发布日期:2020-11-05
通讯作者: 国家自然科学基金资助项目(表征变压器绕组热点纸绝缘老化的乙醇特征量及其生成机理研究，51907034)
作者简介:李予全(1985—)，男，高级工程师，从事变压器类设备现场检测、试验及事故分析等研究，E-mail： 13653846332@163.com;寇晓适(1978—)，男，通信作者，博士，高级工程师(教授级)，从事高电压绝缘技术研究、特高压设备故障诊断等研究，E-mail：koukuo@163.com
基金资助:
This work is supported by National Natural Science Foundation of China (Aging Characterization of Transformer Winding Hotspot Paper Insulation by Using Ethanol and Its Formation Mechanism, No.51907034)

Insulation Fault Caused by Current Transformer Seal Failure

LI Yuquan¹, KOU Xiaoshi¹, ZHANG Shaofeng¹, SHAO Yingbiao², ZHAO Yongfeng¹, ZHU Hua¹, ZHANG Yifan¹, ZHENG Hanbo³

1. State Grid Henan Electric Power Research Institute, Zhengzhou 450052, China;
2. State Grid Henan Electric Power Company, Zhengzhou 450052, China;
3. Guangxi University, Nanning 530000, China

Received:2020-04-06 Revised:2020-06-05 Online:2020-11-05 Published:2020-11-05

摘要/Abstract

摘要： 首先介绍了油浸式电流互感器和SF₆电流互感器的整体绝缘结构，以近期多地出现的电流互感器绝缘故障为切入点，分析了电流互感器绝缘击穿的原因。通过电流互感器的解体检查进一步推断出设备故障的根源为互感器密封失效，针对油浸式电流互感器的金属膨胀器渗漏、SF₆电流互感器爆破片破损引发的密封失效现象，提出了运行维护建议和预防措施。

关键词: 电流互感器, 金属膨胀器, 爆破片, 密封失效

Abstract: Firstly, the insulation structures of oil-immersed current transformer (TA) and SF₆ TA are introduced. And then, the causes of TA insulation breakdowns are analyzed based on an investigation of the insulation faults of TAs occurring in several cases. It is concluded through further disintegration examination that the seal failure is the root cause for insulation fault. Lastly, operation recommendations and precautions are presented for seal failure caused by the metal expander leakage of oil-immersed TA and the rupture disc damage of SF₆ TA.

Key words: current transformer, metal expander, rupture discs, seal failure

李予全, 寇晓适, 张少锋, 邵颖彪, 赵永峰, 朱华, 张逸凡, 郑含博. 电流互感器密封失效引起的绝缘故障[J]. 中国电力, 2020, 53(11): 147-153,174.

LI Yuquan, KOU Xiaoshi, ZHANG Shaofeng, SHAO Yingbiao, ZHAO Yongfeng, ZHU Hua, ZHANG Yifan, ZHENG Hanbo. Insulation Fault Caused by Current Transformer Seal Failure[J]. Electric Power, 2020, 53(11): 147-153,174.

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https://www.electricpower.com.cn/CN/Y2020/V53/I11/147

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电流互感器密封失效引起的绝缘故障

Insulation Fault Caused by Current Transformer Seal Failure

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电流互感器密封失效引起的绝缘故障

Insulation Fault Caused by Current Transformer Seal Failure

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