Calculation and Measurement of AC Resistance for the Metal Sheath in Power Cables

HAN Xiao; LIU Xiongjun; LIU Ying; ZHANG Heyan

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Calculation and Measurement of AC Resistance for the Metal Sheath in Power Cables

更新时间：2025-06-18

- Calculation and Measurement of AC Resistance for the Metal Sheath in Power Cables
- High Voltage Apparatus Pages: 1-8(2025)
- 作者机构：
  
  1.江苏上上电缆集团科学技术研究院，江苏　溧阳　 213300
  2.西安交通大学电气工程学院，西安　 710049
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(51777156)
- DOI：
  CLC：
- Published：
- 稿件说明：
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HAN Xiao, LIU Xiongjun, LIU Ying, et al. Calculation and Measurement of AC Resistance for the Metal Sheath in Power Cables[J/OL]. High voltage apparatus, 2025, 1-8.
DOI：

HAN Xiao, LIU Xiongjun, LIU Ying, et al. Calculation and Measurement of AC Resistance for the Metal Sheath in Power Cables[J/OL]. High voltage apparatus, 2025, 1-8. DOI：

摘要

金属护层是电力电缆的必要组成部分，其交流电阻是电缆设计及性能评估的重要参数，但目前还没有推荐计算公式或算法可参考，也没有专用测量设备可应用。文中针对电力电缆金属护层的电阻计算及测量展开研究，重点关注交流电阻相对于直流电阻增大的程度。首先，对不同结构金属护层的直流电阻解析算法进行讨论，并借鉴中空线芯导体的推荐公式，提出了金属护层交流电阻的计算方法。在此基础上，讨论了材料电导率、护层厚度、电源频率、电缆相间距对金属护层交直流电阻比的影响。之后，建立了金属护层电阻测量方法及测试线路，利用特制夹具及铠装回流等方式减小接触电阻及电磁干扰的影响，对3种不同型号的电缆成品进行了测量，并将测量数据与解析计算结果进行对比，两者具有较好的一致性。研究表明，虽然工频下电缆中常规厚度的金属护层其交流有效电阻比直流电阻增大幅度不超过2%，但随频率增大交直流电阻比将显著增加；文中提出的方法可用于不同材料、结构及尺寸的金属护层直流及交流电阻的工程计算及测量，具有较好的适用性。

Abstract

The metal sheath is an essential part of a power cable

and its AC resistance is an important parameter for cable design and performance evaluation. However

there is neither recommended calculation formula or algorithm

nor special measuring device. This paper aims to study the resistance calculation and measurement of metal sheath in power cables

with a focus on the increase degree of AC resistance compared to DC resistance. Firstly

the analytical algorithm of DC resistance is presented for the metal sheath with different structures

and the calculation method of AC resistance is proposed by referring to the recommended formula of hollow conductor. Based on this

the effects of material conductivity

sheath thickness

power frequency and phase spacing on the AC/DC resistance ratio of metal sheath are discussed. At the same time

the measuring method is established for the resistance of metal sheath

and the corresponding test circuit is set up

where the influence of poor contact and electromagnetic interference can be minimized by the special sample fixture and armor back-flowing method. The case study is performed on the metal sheath of three different cables

and the measured data are compared with the analytically calculated values

where a good consistency is found. The results show that although the AC resistance is no more than 2% higher than the DC one for the metal sheath with a normal thickness

the AC/DC resistance ratio will increase remarkably with the increase of the frequency. The method proposed in this paper can be used for the engineering calculation and measurement of DC and AC resistance of metal sheath with different materials

structures and sizes

which is widely applicable.

关键词

Keywords

references

陈曼虹 . 电力电缆金属屏蔽的截面积及其短路热稳定要求 [J ] . 电气技术 , 2013 ( 12 ): 105 - 106 .

CHEN Manhong . Requirements for metallic screen size and thermal short-circuit of power cable [J ] . Electrical Engineering , 2013 ( 12 ): 105 - 106 .

王晓东 , 宣天鹏 . 电缆屏蔽材料的种类及应用 [J ] . 安全与电磁兼容 , 2015 ( 1 ): 76 - 79 .

WANG Xiaodong , XUAN Tianpeng . Type and application of EMS materials for cables [J ] . Safety & EMC , 2015 ( 1 ): 76 - 79 .

蒲丽娟 , 刘念 , 刘航宇 , 等 . 铜屏蔽层间隔缠绕引发电力电缆过热的故障分析与仿真计算 [J ] . 高压电器 , 2016 , 52 ( 4 ): 157 - 162 .

PU Lijuan , LIU Nian , LIU Hangyu , et al . Analysis and simulation calculation of power cable overheating fault caused by copper shield interval winding [J ] . High Voltage Apparatus , 2016 , 52 ( 4 ): 157 - 162 .

徐刚 , 吴炯 . 中高压电力电缆金属屏蔽结构特性分析 [J ] . 电线电缆 , 2004 ( 5 ): 19 - 22 .

XU Gang , WU Tong . Analysis of the constructional characteristic of the metal screen used in MV/HV power cables [J ] . Wire & Cable , 2004 ( 5 ): 19 - 22 .

高建堂 . 测量电力电缆金属屏蔽层电阻和导体电阻比的方法和意义 [J ] . 科技创新导报 , 2012 ( 30 ): 74 .

GAO Jiantang . Method and significance of measuring resistance ratio between metal shielding layer and conductor of power cable [J ] . Science and Technology Innovation Herald , 2012 ( 30 ): 74 .

Electric cables-calculation of current rating-Part 1: Current rating equations (100% load factor) and calculation of losses: IEC 60287-1-1: 2014 [S ] . 2014 .

DOUGLASS D , GAUNDRY M , SEPPA T , et al . Alternating current (AC) resistance of helically stranded conductors [J ] . Electra , 2008 ( 237 ): 72 - 80 .

SUZUKI H , KANAOKA M . Theoretical investigation on skin effect factor of conductor in power cables [J ] . Electrical Engineering in Japan , 2008 , 165 ( 1 ): 18 - 34 .

CIGRE TB 272. Large Cross-Sections and Composite Screen Design [R ] . France : CIGRE Working Group B1.03 . 2005 .

RYDLER K , SJOBERG M , SVAHN J . A measuring system of conductor AC and DC resistance [C ] // 8th International Conference on Insulated Power Cables . France : [s.n.] , 2011 : A.8.1 .

SCHRDER G , KAUMANNS J , PLATH R , et al . Advanced measurement of ac resistance on skin-effect reduced large conductor power cables [C ] // 8th International Conference on Insulated Power Cables . France : [s.n.] , 2011 : A.8.2 .

高岭 . 大截面XLPE电缆导体交流电阻的测量技术研究 [D ] . 西安 : 西安交通大学 , 2013 .

GAO Ling . Study on measurement technology of conductor AC resistance of large cross-section XLPE cable [D ] . Xi’an : Xi’an Jiaotong University , 2013 .

Calculation of thermally permissible short-circuit currents, taking into account non- adiabatic heating effects: IEC 60949: 1988 [S ] . 1988 .

DAI D , ZHANG X H , WANG J J . Calculation of AC Resistance for Stranded single-core power cable conductors [J ] . IEEE Transactions on Magnetics . 2014 , 50 ( 11 ): 1 - 4 .

PATEL R , PREMKUMAR S , AMBADE A , et al . AC resistance calculation of litz wire and its modeling with FEMM [C ] // 2016 IEEE International Conference on Recent Trends in Electronics, Information and Communication Technology . New York : IEEE , 2016 : 692 - 696 .

郑建康 . 35 kV单芯电缆金属屏蔽层截面选择应注意的问题 [J ] . 高电压技术 , 2004 , 30 ( z1 ): 31 - 38 .

ZHENG Jiankang . The selection of section of metal shield layer of single core cable [J ] . High Voltage Engineering , 2004 , 30 ( z1 ): 31 - 38 .

黄海 . 中压单芯电力电缆金属屏蔽结构的选择 [J ] . 电气技术 , 2013 ( 7 ): 74 - 75 .

HUANG Hai . Choice of metallic shield in medium voltage single core power cables [J ] . Electrical Engineering , 2013 ( 7 ): 74 - 75 .

朱欣娣 , 武宇波 , 魏莹莹 . 中压交联电缆金属屏蔽层的几个关键问题的讨论 [J ] . 电线电缆 , 2009 ( 4 ): 11 - 13 .

ZHU Xinti , WU Yubo , WEI Yingying . Discussion on some problems about the metallic shield in MV XLPE cables [J ] . Wire & Cable , 2009 ( 4 ): 11 - 13 .

Short circuit performance of metallic shields and sheaths on insulation cables: ICEA P-45-482—2017 [S ] . 2017 .

刘子玉 . 电气绝缘结构设计原理 [M ] . 北京 : 机械工业出版社 , 1981 .

LIU Ziyu . Design principle of electrical insulation structure [M ] . Beijing : China Machine Press , 1981 .

CASTELLI F , MACIOTTA L , RINER P . A new method of measuring the AC resistance of large cable conductors [J ] . IEEE Transactions on Power Apparatus and Systems , 1977 , 96 ( 2 ): 414 - 422 .

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