Research on Live Positioning Method of High-voltage Cable Outer Sheath Grounding Fault Based on Sheath Circulating Current Characteristics

Huang Junsong; Li Yamei; Xu Dangguo; Li Yuan; Zhou Kai; Chen Long

doi:null

您当前的位置：

首页 >

文章列表页 >

Research on Live Positioning Method of High-voltage Cable Outer Sheath Grounding Fault Based on Sheath Circulating Current Characteristics

更新时间：2026-07-17

- Research on Live Positioning Method of High-voltage Cable Outer Sheath Grounding Fault Based on Sheath Circulating Current Characteristics
- High VoltageApparatus (2026)
- 作者机构：
  
  1.三峡大学电气与新能源学院，宜昌 443002
  2.国网冀北电力有限公司电力科学研究院，北京 100054
  3.四川大学电气工程学院，成都 610065
- 作者简介：
- 基金信息：
  
  Hubei Transmission Line Engineering Technology Research Center (China Three Gorges University) Open Fund Project(2024KXL08)
- DOI：
  CLC：
- Received：16 June 2025，
  
  Revised：2025-08-20，
  
  Accepted：07 September 2025，
- 稿件说明：
移动端阅览
Huang Junsong, Li Yamei, Xu Dangguo, et al. Research on Live Positioning Method of High-voltage Cable Outer Sheath Grounding Fault Based on Sheath Circulating Current Characteristics[J/OL]. High VoltageApparatus, 2026.
DOI：

Huang Junsong, Li Yamei, Xu Dangguo, et al. Research on Live Positioning Method of High-voltage Cable Outer Sheath Grounding Fault Based on Sheath Circulating Current Characteristics[J/OL]. High VoltageApparatus, 2026. DOI：

摘要

为提升高压电缆外护套接地故障的检测效率与定位精度，解决传统定位方法依赖停电操作、定位延迟及实施复杂度高等问题，提出一种基于护层环流特征的带电定位方法。以单端保护接地与交叉互联接地方式为例，理论分析护层电流形成机理，基于PSCAD/EMTDC搭建三相单芯电缆电磁暂态模型并验证其准确性；通过模拟外护套接地故障动态过程，分析护层电流随故障位置变化的分布特性；采用多项式拟合法建立护层电流-故障位置特征方程，结合直接接地端电流反演故障位置，实现实时带电定位。工程案例验证了方法的可行性，单端接地系统仅需单点电流测量即可定位，交叉互联系统通过两端电流同步监测实现故障段判别及故障定位，无须停电且操作复杂度低，所提方法为高压电缆外护套接地故障的在线检测与快速定位提供了有效技术参考，具有重要工程应用价值。

Abstract

To enhance the detection efficiency and positioning accuracy of high-voltage cable outer sheath grounding fault

and address the limitations of traditional positioning methods that rely on power outage operation

positioning delay and high implementation complexity

a live positioning method based on sheath circulating current characteristics is proposed. Taking single-ended protective grounding and cross-connected grounding as examples

the formation mechanism of sheath current is analyzed theoretically

and the electromagnetic transient model of three-phase single-core cable is built and validated based on PSCAD / EMTDC. By simulating the dynamic process of the outer sheath grounding fault

the distribution characteristics of the sheath current varying with the fault location are analyzed. A polynomial fitting method is employed to establish the sheath current-fault location characteristic equation

which

combined with current inversion at the direct grounding end

enables real-time online fault location. Engineering case studies have verified the feasibility of the proposed method. For single-end grounding systems

fault location can be achieved through single-point current measurement

while cross-connected systems require synchronous current monitoring at both ends to identify fault sections and determine precise locations

without power outage and low operation complexity. The proposed method provides an effective technical reference for on-line detection and rapid location of high-voltage cable outer sheath grounding fault

and has important engineering application value.

关键词

Keywords

references

吴春芳，陈云，黄韬，等．电力电缆状态感知与检测技术研究综述 [J ] ．高压电器， 2024 ， 60 ( 10 )： 86 - 103 ．

WU Chunfang ， CHEN Yun ， HUANG Tao et al . Overview of Condition Sensing and Detection Technology for Power Cables [J ] ． High Voltage Apparatus ， 2024 ， 60 ( 10 )： 86 - 103 ．

马国明，秦炜淇，王思涵，等．海底电缆状态分布式光纤监测技术研究综述 [J ] ．中国电机工程学报， 2025 ， 45 ( 01 )： 370 - 388 ．

MA Guoming ， QIN Weiqi ， WANG Sihan et al . Review of submarine cable condition monitoring based on distributed optical fiber sensing [J ] ． Proceedings of the CSEE ， 2025 ， 45 ( 01 )： 370 - 388 ．

孙瑞娟，梁军，王克文，等．海上风电集电系统研究综述 [J ] ．电力建设， 2021 ， 42 ( 06 )： 105 - 115 ．

SUN Ruijuan ， LIANG Jun ， WANG Kewen et al . Overview of Offshore Wind Power Collection System [J ] ． Electric Power Construction ， 2021 ， 42 ( 06 )： 105 - 115 ．

迟鹏，梁睿．基于知识蒸馏与注意力机制的电缆故障可扩展化诊断研究 [J/OL ] . 高电压技术， 1 - 12 [ 2025-04-25 ] . http://kns.cnki.net/kcms/detail/42.1239.TM.20250115.1805.008.html http://kns.cnki.net/kcms/detail/42.1239.TM.20250115.1805.008.html .

CHI Peng ， LIANG Rui . Research on scalable diagnosis of cable faults based on knowledge distillation and attention mechanism [J/OL ] ． High Voltage Engineering ， 1 - 12 [ 2025-04-25 ] ． http://kns.cnki.net/kcms/detail/42.1239.TM.20250115.1805.008.html http://kns.cnki.net/kcms/detail/42.1239.TM.20250115.1805.008.html ．

刘福源，王航，夏湛然，等．交叉互联高压电缆护层保护器故障对同回路两端护层电流相量差的影响 [J ] ．高电压技术， 2023 ， 49 ( 03 )： 1244 - 1253 ．

LIU Fuyuan ， WANG Hang ， XIA Zhanran et al . Influence of the sheath voltage limiter fault on the sheath current phasor difference between the two ends in the same sheath loop in cross-bonded HV cables [J ] ． High Voltage Engineering ， 2023 ， 49 ( 03 )： 1244 - 1253 ．

XIN Y ， JIANG L ， ZHAO X et al . Cause Analysis of Aging Ablation on Sheath of 110 kV Single Core High Voltage Cable [C ] // 2019 IEEE Conference on Electrical Insulation and Dielectric Phenomena(CEIDP) ． Richland，WA，USA ： IEEE ， 2019 ： 162 - 165 ．

王晓卫，魏春燕，王毅钊，等．基于护层接地线电流和分段TKEO的电缆早期故障检测方法 [J ] ．电力系统保护与控制， 2025 ， 53 ( 13 )： 47 - 58 ．

WANG Xiaowei ， WEI Chunyan ， WANG Yizhao et al . Early fault detection method for cables based on sheath grounding current and segmented TKEO [J ] ． Power System Protection and Control ， 2025 ， 53 ( 13 )： 47 - 58 ．

Yu J ， Gu S ， Xu G et al . Calculation of metal sheath circulating currents in multi-circuit power cables laid in tunnels [J ] ． Ain Shams Engineering Journal ， 2025 ， 16 ( 7 )： 103408 ．

刘博，郭卫，及洪泉，等．高压电缆外护层破损演进与护层环流相关性研究 [J ] ．电网与清洁能源， 2025 ， 41 ( 05 )： 22 - 29+40 ．

LIU Bo ， GUO Wei ， JI Hongquan et al . A Study on the Correlation between Damage Evolution of Outer Protective Layer and Sheath Circulation of High Voltage Cables [J ] ． Power System and Clean Energy ， 2025 ， 41 ( 05 )： 22 - 29+40 ．

张程华，王丰润，刘博，等．同隧道并行电缆交叉互联护层错位分段对金属护层电流的影响 [J/OL ] ．高压电器， 1 - 11 [ 2025-06-10 ] ． http://kns.cnki.net/kcms/detail/61.1127.tm.20250312.1012.002.html http://kns.cnki.net/kcms/detail/61.1127.tm.20250312.1012.002.html .

ZHANG Chenghua ， WANG Fengrun ， LIU Bo et al . Influence of Cross-bonded Parallel Cable Joints in the Same Tunnel on the Current of Metal Sheath [J/OL ] ． High Voltage Apparatus ， 1 - 11 [ 2025-06-10 ] ． http://kns.cnki.net/kcms/detail/61.1127.tm.20250312.1012.002.html http://kns.cnki.net/kcms/detail/61.1127.tm.20250312.1012.002.html ．

王春坡，周凯，孟鹏飞，等．基于金属护层环流的高压电缆外护套绝缘电阻在线监测方法 [J ] ．绝缘材料， 2024 ， 57 ( 07 )： 112 - 120 ．

WANG Chunpo ， ZHOU Kai ， MENG Pengfei et al . Online monitoring method for insulation resistance of high-voltage cable outer sheath based on mental sheath circulation current [J ] ． Insulating Materials ， 2024 ， 57 ( 07 )： 112 - 120 ．

潘文霞，谢晨，赵坤，等．计及护层环流的电缆温升分析与故障定位方法研究 [J ] ．电机与控制学报， 2021 ， 25 ( 01 )： 38 - 45 ．

PAN Wenxia ， XIE Chen ， ZHAO Kun et al . Cable temperature rise analysis and fault location considering sheath circulation．Electric Machines and Control [J ] ， 2021 ， 25 ( 01 )： 38 - 45 ．

Li Z ， Du B ， Li W . Evaluation of high‐voltage AC cable grounding systems based on the real‐time monitoring and theoretical calculation of grounding currents [J ] ． High voltage ， 2018 ， 3 ( 1 )： 38 - 43 ．

朱博，于晓洋，田立刚，等．基于阻性电流和护层电流的交叉互联电缆绝缘监测及诊断 [J ] ．电机与控制学报， 2023 ， 27 ( 02 )： 79 - 88 ．

ZHU Bo ， YU Xiaoyang ， TIAN Ligang et al . Insulation monitoring and diagnosis for cross-bonded cables based on resistive and sheath current [J ] ． Electric Machines and Control ， 2023 ， 27 ( 02 )： 79 - 88 ．

蒋原，李擎，冯茜，等．基于BP神经网络的直流电网故障定位与保护方法 [J ] ．高压电器， 2020 ， 56 ( 08 )： 23 - 28 ．

JIANG Yuan ， LI Qing ， FENG Qian et al . Fault location and protection method for DC power grid based on BP neural network [J ] ． High Voltage Apparatus ， 2020 ， 56 ( 08 )： 23 - 28 ．

何潜，李渠佳，邓炎，等．有源配电网异名相两点接地故障测距算法 [J/OL ] ．电力自动化设备， 1 - 13 [ 2025-04-25 ] ． https://doi.org/10.16081/j.epae.202503001 https://doi.org/10.16081/j.epae.202503001 ．

HE Qian ， LI Qujia ， DENG Yan et al . A fault location algorithm for two-point grounding fault of non-identical phase in active distribution network [J/OL ] ． Electric Power Automation Equipment ， 1 - 13 [ 2025-04-25 ] ． https://doi.org/10.16081/j.epae.202503001 https://doi.org/10.16081/j.epae.202503001 ．

刘鹏辉，马梦磊，戴瑜兴，等．基于行波时序特征的双端直流输电线路故障测距 [J/OL ] ．电网技术， 1 - 9 [ 2025-08-14 ] ． https://link.cnki.net/urlid/11.2410.TM.20250802.1912.004 https://link.cnki.net/urlid/11.2410.TM.20250802.1912.004 ．

LIU Penghui ， MA Menglei ， DAI Yuxing et al . Fault Location of Dual-terminal DC Transmission Lines Based on Time Series Characteristics of Traveling Waves [J/OL ] ． Power System Technology ， 1 - 9 [ 2025-08-14 ] ． https://link.cnki.net/urlid/11.2410.TM.20250802.1912.004 https://link.cnki.net/urlid/11.2410.TM.20250802.1912.004 ．

Haohao C ， Jing L ， Ping C . Design of fault location algorithm based on online distributed travelling wave for HV power cable [J ] ． PloS one ， 2024 ， 19 ( 1 )： e0296513 ．

齐郑，黄朝晖，陈艳波．基于零序分量的阻抗法配电网故障定位技术 [J ] ．电力系统保护与控制， 2023 ， 51 ( 06 )： 54 - 62 ．

QI Zheng ， HUANG Zhaohui ， CHEN Yanbo . Impedance fault location technology for a distribution network based on a zero-sequence component [J ] ． Power System Protection and Control ， 2023 ， 51 ( 06 )： 54 - 62 ．

斯捷，陈植，赵建，等．基于阻抗谱的电力电缆绝缘缺陷诊断函数故障定位与状态评估方法研究 [J ] ．电测与仪表， 2025 ， 62 ( 07 )： 217 - 224 ．

SI Jie ， CHEN Zhi ， ZHAO Jian et al . Research on fault location and state evaluation method of diagnostic function for power cable insulation defects based on the impedance spectrum [J ] ． Electrical Measurement & Instrumentation ， 2025 ， 62 ( 07 )： 217 - 224 ．

中华人民共和国住房和城乡建设部．电力工程电缆设计标准： GB 50217-2018 [S ] ．中国计划出版社， 2018 ．

Ministry of Housing and Urban-Rural Development of the People's Republic of China ． Standard for design of cables of electric power engineering ： GB 50217-2018 [S ] ． Beijing China Planning Publishing House ， 2018 ．

电力设备预防性试验规程： DL/T 596-1996 [S ] ， 1996 ．

Rules of preventive tests for electric power equipment ： DL/T 596-1996 [S ] ， 1996 ．

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Study on Overvoltage Characteristics and Influencing Factors of UHVDC Converter Station in Grounding Fault Condition

Simulation of Multipoint Grounding Faults in Metal Sheath of High-voltage Cable Based on ATP

Simulation Study on Switching Overvoltage in Converter Substation Caused by Grounding Fault at the Top of High-voltage Thyristor Valve

Study of NBGS Suppression on Overvoltage Caused by Grounding Fault at the Top of High-voltage Valve

Research on Simplified Model of High-voltage Cable Laying Under Complicated Working Conditions and Engineering Verification

Related Author

ZHANG Zongyang

GUO Jie

MA Zixin

YU Fang

WANG Zhiyuan

KANG Chao

WANG Xinqiao

TANG Yan

Related Institution

College of Electrical Engineering, Xi'an Jiaotong University

Hubei Electric Power Survey & Design Institute

Pinggao Group Co., Ltd.

College of Electric Information Engineering,Pingdingshan University

Jiangsu Wuxi Power Supply Company of SGCC

⁰