Abnormal Capacitance and Dielectric Loss Analysis of 500kV Inverted Current Transformer

ZHANG Yuanhang; LIU Sai; CHEN Hao; CHEN Jing; LU Haomin; ZHOU Cheng

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

您当前的位置：

首页 >

文章列表页 >

Abnormal Capacitance and Dielectric Loss Analysis of 500kV Inverted Current Transformer

Instrument Transformer | 更新时间：2025-10-30

- Abnormal Capacitance and Dielectric Loss Analysis of 500kV Inverted Current Transformer
- Power Capacitor & Reactive Power Compensation Vol. 46, Issue 5, Pages: 98-106(2025)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2025.05.011
  CLC：
- Received：15 May 2025，
  
  Published：25 October 2025
- 稿件说明：
移动端阅览
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：

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.

关键词

Keywords

references

王毓琦 , 李红斌 , 向鑫 , 等 . 电力互感器检定与评估方法综述 [J ] . 高压电器 , 2020 , 56 ( 4 ): 95 - 101 .

WANG Yuqi , LI Hongbin , XIANG Xin , et al . Review of verification and evaluation methods of power transformers [J ] . High Voltage Apparatus , 2020 , 56 ( 4 ): 95 - 101 .

付佳佳 , 卢丽鹏 , 刘彩霞 , 等 . 基于自适应正弦滤波的低压电流互感器在线检测方法研究 [J ] . 自动化与仪器仪表 , 2024 ( 10 ): 84 - 88 .

FU Jiajia , LU Lipeng , LIU Caixia , et al . Research on online detection method of low voltage current transformer based on adaptive sine filtering [J ] . Automation & Instrumentation , 2024 ( 10 ): 84 - 88 .

孙帆 , 王维庆 , 金铭 , 等 . 油浸型倒立式电流互感器内绝缘缺陷特征及检测方法 [J ] . 电力电容器与无功补偿 , 2025 , 46 ( 2 ): 120 - 126 .

SUN Fan , WANG Weiqing , JIN Ming , et al . Inner insulation defect characteristic and detection method of oil immersed inverted current transformer [J ] . Power Capacitor &Reactive Power Compensation , 2025 , 46 ( 2 ): 120 - 126 .

陈昊 , 姚凯 , 任帅 , 等 . 变电站设备联合巡检技术及应用 [J ] . 农村电气化 , 2025 ( 2 ): 36 - 40 .

CHEN Hao , YAO Kai , REN Shuai , et al . Joint inspection technology and its application for substation devices [J ] . Rural Electrification , 2025 ( 2 ): 36 - 40 .

陶雄武 , 周俊宏 , 陈德权 , 等 . 电流互感器饱和误差二次补偿方法研究 [J ] . 自动化仪表 , 2025 , 46 ( 4 ): 12 - 16 .

TAO Xiongwu , ZHOU Junhong , CHEN Dequan , et al . Research on secondary compensation method of current transformer saturation error [J ] . Process Automation Instrumentation , 2025 , 46 ( 4 ): 12 - 16 .

GAO S , ZHANG S , XU Z , et al . The development of active capacitive voltage divider based on current transformer with compensation circuit [J ] . Journal of Physics. Conference Series , 2021 ( 1 ): 1206 - 1212 .

王有元 , 李伯男 , 黄磊峰 , 等 . 倒置式油浸电流互感器受潮过程微水含量动态推演方法 [J ] . 高电压技术 , 2021 , 47 ( 6 ): 1921 - 1930 .

WANG Youyuan , LI Bainan , HUANG Leifeng , et al . Dynamic deduction method of moisture content of inverted oil immersed current transformer during damp process [J ] . High Voltage Engineering , 2021 , 47 ( 6 ): 1921 - 1930 .

王兴东 , 薛劲莹 . 基于窄带物联网的油浸式电流互感器智能检测技术研究 [J ] . 电测与仪表 , 2023 , 60 ( 5 ): 167 - 172 .

WANG Xingdong , XUE Jinying . Research on intelligent detection technology of oil-immersed current transformer based on narrowband internet of things [J ] . Electrical Measurement & Instrumentation , 2023 , 60 ( 5 ): 167 - 172 .

刘彬 , 邓小聘 , 李建光 , 等 . 柔性直流光纤电流互感器阶跃响应特性研究 [J ] . 高压电器 , 2024 , 60 ( 5 ): 140 - 146 .

LIU Bin , DENG Xiaopin , LI Jianguang , et al . Research on step response characteristics of flexible DC fiber-optic current transformer [J ] . High Voltage Apparatus , 2024 , 60 ( 5 ): 140 - 146 .

徐鹏 , 崔光鲁 , 甘强 , 等 . 油浸倒立式电流互感器缺陷分析及对策 [J ] . 湖南电力 , 2022 , 42 ( 2 ): 80 - 84 .

XU Peng , CUI Guanglu , GAN Qiang , et al . Analysis and countermeasures of oil immersed inverted current defect [J ] . Hunan Electric Power , 2022 , 42 ( 2 ): 80 - 84 .

王中 , 李振华 , 成俊杰 , 等 . Rogowski线圈电流互感器故障的早期诊断研究 [J ] . 高压电器 , 2023 , 59 ( 2 ): 162 - 168 .

WANG Zhong , LI Zhenhua , CHENG Junjie , et al . Research on early diagnosis of fault of current transformer with Rogowski coil [J ] . High Voltage Apparatus , 2023 , 59 ( 2 ): 162 - 168 .

沙玉洲 , 李淑兰 , 刘爽 , 等 . 大型发电机组中两级组合式大电流互感器的技术探讨 [J ] . 变压器 , 2024 , 61 ( 2 ): 22 - 25 .

SHA Yuzhou , LI Shulan , LIU Shuang , et al . Discussion on technology of two-stage combined large current transformer in large generator set [J ] . Transformer , 2024 , 61 ( 2 ): 22 - 25 .

季昆玉 , 刘洋 , 李伯男 , 等 . 倒置式油浸电流互感器内部温度场分布及内部压力影响特性研究 [J ] . 重庆大学学报 , 2021 , 44 ( 8 ): 134 - 145 .

JI Kunyu , LIU Yang , LI Bainan , et al . Internal temperature field distribution and influencing characteristics of internal pressure of inverted oil-immersed current transformer [J ] . Journal of Chongqing University , 2021 , 44 ( 8 ): 134 - 145 .

刘博闻 , 邹国平 , 魏兴昌 , 等 . 用于过电压检测的电流互感器高频等效电路建模方法 [J ] . 高压电器 , 2023 , 59 ( 3 ): 156 - 162 .

LIU Bowen , ZOU Guoping , WEI Xingchang , et al . Modeling method of high-frequency equivalent circuit of current transformer for overvoltage detection [J ] . High Voltage Apparatus , 2023 , 59 ( 3 ): 156 - 162 .

杨智 , 郑一鸣 , 何文林 , 等 . 冲击电压下500 kV油浸倒置式电流互感器局部放电特性研究 [J ] . 广东电力 , 2020 , 33 ( 3 ): 111 - 119 .

YANG Zhi , ZHENG Yiming , HE Wenlin , et al . Research on partial discharge characteristics of 500 kV oil-immersed current transformer under impulse voltage [J ] . Guangdong Electric Power , 2020 , 33 ( 3 ): 111 - 119 .

范伟男 , 王勇 , 覃煜 , 等 . 一起220 kV油浸倒置式CT异常发热缺陷诊断分析 [J ] . 高压电器 , 2019 , 55 ( 3 ): 245 - 252 .

FAN Weinan , WANG Yong , QIN Yu , et al . Diagnosis and analysis of abnormal thermal defect in a 220 kV oil-immersed inverted CT [J ] . High Voltage Apparatus , 2019 , 55 ( 3 ): 245 - 252 .

刘赛 , 李正 , 陈昊 , 等 . 高压油浸式电抗器稳态电磁特性仿真研究 [J ] . 变压器 , 2023 , 60 ( 8 ): 40 - 47 .

LIU Sai , LI Zheng , CHEN Hao , et al . Simulation analysis and research on steady-state electromag-netic characteristics of high-voltage oil-immersed reactor [J ] . Transformer , 2023 , 60 ( 8 ): 40 - 47 .

姚力 , 许灵洁 , 李舜 , 等 . 基于数字比较法的宽频标准电流互感器溯源技术研究 [J ] . 电测与仪表 , 2024 , 61 ( 8 ): 97 - 103 .

YAO Li , XU Lingjie , LI Shun , et al . Research on traceability technology of broadband standard current transformer based on digital comparison method [J ] . Electrical Measurement & Instrumentation , 2024 , 61 ( 8 ): 97 - 103 .

李予全 , 寇晓适 , 张少锋 , 等 . 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 .

LI Yuquan , KOU Xiaoshi , ZHANG Shaofeng , et al . Insulation fault caused by current transformer seal failure [J ] . Electric Power , 2020 , 53 ( 11 ): 147 - 153 .

许飞宇 , 燕伯峰 , 刘宇鹏 , 等 . 空气缝隙对抗直流分量电流互感器影响研究 [J ] . 电测与仪表 , 2024 , 61 ( 10 ): 203 - 208 .

XU Feiyu , YAN Bofeng , LIU Yupeng , et al . Research on influence of air gap on anti-DC component current transformer [J ] . Electrical Measurement & Instrumentation , 2024 , 61 ( 10 ): 203 - 208 .

李宝权 , 陈志勇 , 刘晓波 , 等 . 220 kV油浸式电流互感器油色谱异常原因分析 [J ] . 东北电力技术 , 2023 , 44 ( 10 ): 36 - 40 .

LI Baoquan , CHEN Zhiyong , LIU Xiaobo , et al . Analysis of abnormal oil chromatography of 220 kV oil-immersed current transformer [J ] . Northeast Electric Power Technology , 2023 , 44 ( 10 ): 36 - 40 .

刘凯 , 汲胜昌 , 钟理鹏 , 等 . 500 kV SF 6 电流互感器电容屏缺陷下的气体分解特性 [J ] . 西安交通大学学报 , 2017 , 51 ( 2 ): 111 - 120 .

LIU Kai , JI Shengchang , ZHONG Lipeng , et al . Gas decomposition characteristics under capacitive screen defect in SF 6 current transformer [J ] . Journal of Xi’an Jiaotong University , 2017 , 51 ( 2 ): 111 - 120 .

付丽君 , 陆昊 , 关艳玲 , 等 . 一起220 kV电流互感器故障原因分析 [J ] . 黑龙江电力 , 2022 , 44 ( 1 ): 75 - 78 .

FU Lijun , LU Hao , GUAN Yanling , et al . Fault analysis of 220 kV current transformer [J ] . Heilongjiang Electric Power , 2022 , 44 ( 1 ): 75 - 78 .

带电设备红外诊断应用规范:DL/T 664—2016 [S ] . 2016 .

Application rules of infrared diagnosis for live electrical equipment:DL/T 664—2016 [S ] . 2016 .

输变电设备状态检修试验规程:DL/T 393—2021 [S ] . 2021 .

Code of condition-based maintenance test for electric equipment:DL/T 393—2021 [S ] . 2021 .

杨智 , 郑一鸣 , 何文林 , 等 . 一起油浸倒置式电流互感器故障分析及其防范措施 [J ] . 电力电容器与无功补偿 , 2020 , 41 ( 3 ): 99 - 105 .

YANG Zhi , ZHENG Yiming , HE Wenlin , et al . Fault analysis and preventive measures of oil-immersed inverted current transformer [J ] . Power Capacitor & Reactive Power Compensation , 2020 , 41 ( 3 ): 99 - 105 .

王琼 , 车传强 , 张建英 , 等 . 电流互感器批量缺陷的成因诊断分析和模拟试验研究 [J ] . 电力电容器与无功补偿 , 2021 , 42 ( 2 ): 48 - 53 .

WANG Qiong , CHE Chuanqiang , ZHANG Jianying , et al . Study on diagnosis analysis and simulation tests for batch defects of current transformers [J ] . Power Capacitor & Reactive Power Compensation , 2021 , 42 ( 2 ): 48 - 53 .

陈浩 , 郭铁 , 刘黎洋 , 等 . 主绝缘包扎工艺不良引发油浸式电流互感器内部异常产氢的原因分析 [J ] . 东北电力技术 , 2022 , 43 ( 4 ): 48 - 52 .

CHEN Hao , GUO Tie , LIU Liyang , et al . Analysis of causes of abnormal Hydrogen production inside oil-immersed current transformer caused by poor main insulation bandage [J ] . Northeast Electric Power Technology , 2022 , 43 ( 4 ): 48 - 52 .

贺春安 , 唐福新 , 叶飞 , 等 . 一种多二次绕组串级式测量用电流互感器设计及误差计算方法 [J ] . 变压器 , 2023 , 60 ( 12 ): 6 - 11 .

HE Chunan , TANG Fuxin , YE Fei , et al . Utility model relates to a multi-secondary winding cascade type current transformer for measurement design and error calculation method [J ] . Transformer , 2023 , 60 ( 12 ): 6 - 11 .

詹江杨 , 何文林 , 杨智 , 等 . 油浸正立式电流互感器绝缘受潮缺陷的诊断分析 [J ] . 浙江电力 , 2018 , 37 ( 3 ): 17 - 21 .

ZHAN Jiangyang , HE Wenlin , YANG Zhi , et al . Diagnosis on insulation damp defects of oil-immersed vertical current transformer [J ] . Zhejiang Electric Power , 2018 , 37 ( 3 ): 17 - 21 .

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Analysis and Treatment on Abnormal Capacitance and Dielectric Loss of 500 kV Capacitior Voltage Transformer

Test Method on Site of Dielectric Loss for CVT

Study on Test Method of Coupling Capacitor without Dismantling the High-voltage Lead

Optimization Analysis of 1 kHz High Frequency De-icing for Medium Voltage Transmission Lines

A Problem to be Noticed for On-site Dielectric Loss Measurement of the CVT Voltage Dividing Capacitor

Related Author

ZHOU Cheng

LU Haomin

CHEN Jing

CHEN Hao

ZHANG Yuanhang

LIU Sai

LI Xian-dong

LIN Jian

Related Institution

Kunshan Power Supply Branch, SGCC Jiangsu Power Co., Ltd.

Nanjing Power Supply Branch, SGCC Jiangsu Power Co., Ltd.

Suzhou Power Supply Branch, SGCC Jiangsu Power Co., Ltd.

Henan Zhumadian Power Supply Bureau

Wenzhou Electric Power Bureau of Zhejiang Province

⁰