一起500kV倒置式电流互感器电容量及介质损耗异常分析

张远航; 刘赛; 陈昊; 陈靖; 陆皓珉; 周程

doi:10.14044/j.1674-1757.pcrpc.2025.05.011

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一起500kV倒置式电流互感器电容量及介质损耗异常分析

互感器 | 更新时间：2025-10-30

- 一起500kV倒置式电流互感器电容量及介质损耗异常分析
- Abnormal Capacitance and Dielectric Loss Analysis of 500kV Inverted Current Transformer
- 电力电容器与无功补偿 2025年46卷第5期页码：98-106
- 作者机构：
- 作者简介：
  
  张远航（1983—），男，工程师，从事电力设备运维检修工作。
  刘赛（1993—），男，工程师，研究方向为交直流配电网调度与综合能源系统，从事电力设备运维检修工作。E-mail：cnsailiu@foxmail.com。
  陈昊（1980—），男，研究员级高级工程师、特级技师，从事变电智能运检工作。
  陈靖（1973—），男，工程师，从事电力设备运维检修工作。
  陆皓珉（1992—），男，工程师，从事电力设备运维检修工作。
  周程（1995—），女，工程师，研究方向为电力市场和综合能源系统，从事电力营销工作。
- 基金信息：
  
  国家自然科学基金青年基金(62203247);国网江苏省电力有限公司科技项目(J2024203)
- DOI：10.14044/j.1674-1757.pcrpc.2025.05.011
  中图分类号：
- 收稿：2025-05-15，
  
  纸质出版：2025-10-25
- 稿件说明：
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张远航, 刘赛, 陈昊, 等. 一起500kV倒置式电流互感器电容量及介质损耗异常分析[J]. 电力电容器与无功补偿, 2025,46(5):98-106.

ZHANG Yuanhang, LIU Sai, CHEN Hao, et al. Abnormal Capacitance and Dielectric Loss Analysis of 500kV Inverted Current Transformer[J]. Power Capacitor & Reactive Power Compensation, 2025, 46(5): 98-106.
张远航, 刘赛, 陈昊, 等. 一起500kV倒置式电流互感器电容量及介质损耗异常分析[J]. 电力电容器与无功补偿, 2025,46(5):98-106. DOI： 10.14044/j.1674-1757.pcrpc.2025.05.011.

ZHANG Yuanhang, LIU Sai, CHEN Hao, et al. Abnormal Capacitance and Dielectric Loss Analysis of 500kV Inverted Current Transformer[J]. Power Capacitor & Reactive Power Compensation, 2025, 46(5): 98-106. DOI： 10.14044/j.1674-1757.pcrpc.2025.05.011.

摘要

针对某500kV倒置式电流互感器A相一次绕组对末屏电容量及介质损耗因数超标缺陷，开展常规例行试验及诊断性试验，并结合设备解体检查进行综合研判，确定故障是由器身头部主绝缘存在电缆纸褶皱及直线段高压屏轻微形变褶皱的结构性缺陷导致。表明运输或安装过程中的机械应力导致电容屏结构畸变，该类隐性结构缺陷在长期运行中逐步劣化形成隐患。基于分析结果提出强化生产工艺管控、严格交接验收、加强状态监测等防范措施，为电流互感器质量管控和状态评估提供了参考。

Abstract

In response to the defects of excessive capacitance and dielectric loss factor of primary winding of phase A to the end screen of a 500kV inverted current transformer，the routine and diagnostic tests are carried out and，in combinaion with disassembly and inspection of the equipment for comprehensive analysis，it is determined that the fault is caused by structural defects such as cable paper wrinkles and slight deformation wrinkles of the high-voltage screen in the straight section of the main insulation at the head of the current transformer body. It is indicated that mechanical stress during transportation or installation leads to structural distortion of the capacitive screen，and such hidden structural defects gradually deteriorate and form hidden dangers during long-term operation. Based on the analysis results，such preventive measures as strengthening production process control，strict handover acceptance，and enhancing status monitoring are proposed so to provide reference for quality control and status assessment of current transformer.

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references

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