Inner Insulation Defect Characteristic and Detection Method of Oil-immersed-inverted Type Current Transformer

SUN Fan; WANG Weiqing; JIN Ming; LIU Yong

doi:10.14044/j.1674-1757.pcrpc.2025.02.014

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Inner Insulation Defect Characteristic and Detection Method of Oil-immersed-inverted Type Current Transformer

Instrument transformer | 更新时间：2025-04-29

- Inner Insulation Defect Characteristic and Detection Method of Oil-immersed-inverted Type Current Transformer
- Power Capacitor & Reactive Power Compensation Vol. 46, Issue 2, Pages: 120-126(2025)
- 作者机构：
  
  1.新疆大学可再生能源发电与并网控制教育部工程研究中心，乌鲁木齐　 830000
  2.国网新疆电力有限公司，乌鲁木齐　 830011
  3.安徽正广电电力技术有限公司，合肥　 230000
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2025.02.014
  CLC：
- Received：09 July 2024，
  
  Published：25 April 2025
- 稿件说明：
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SUN Fan, WANG Weiqing, JIN Ming, et al. Inner Insulation Defect Characteristic and Detection Method of Oil-immersed-inverted Type Current Transformer[J]. Power capacitor & reactive power compensation, 2025, 46(2): 120-126.
DOI：

SUN Fan, WANG Weiqing, JIN Ming, et al. Inner Insulation Defect Characteristic and Detection Method of Oil-immersed-inverted Type Current Transformer[J]. Power capacitor & reactive power compensation, 2025, 46(2): 120-126. DOI： 10.14044/j.1674-1757.pcrpc.2025.02.014.

摘要

油浸型倒立式电流互感器是典型的少油设备，长期运行于高电场强度环境下，其绝缘工艺控制难度大，导致因绝缘问题诱发的爆炸、喷油故障多发。本文以油浸型倒立式电流互感器故障分析为切入点，分析了绝缘缺陷产生的原因，对存在缺陷的设备开展气相色谱分析、局部放电检测、高电压介质损耗试验、长时额定电压红外测温测试，最后对测试结果进行了缺陷特征分析，并对在运设备提出合理化缺陷检测方法。

Abstract

The oil-immersed-inverted type current transformer is a typical minimum oil equipment. Under the long term operation in the environment of high electric field intensity

its insulation process control is difficult

leading to frequent explosions and oil injection faults due to insulation. In this paper

the fault analysis of the oil-immersed-inverted type current transformer is taken as the starting point to analyze the causes of insulation defects. The gas chromatography analysis

partial discharge detection

high voltage dielectric loss test and long-term rated voltage infrared temperature measurement test are performed on the defective equipment. Finally

the defect characteristics of the test results are analyzed and a reasonable defect detection method is proposed for the equipment in operation.

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