Journal of South China University of Technology (Natural Science Edition) ›› 2013, Vol. 41 ›› Issue (12): 63-69.doi: 10.3969/j.issn.1000-565X.2013.12.011

• Power & Electrical Engineering • Previous Articles     Next Articles

A New Method to Theoretically Calculate Circulating Current of Sheath of Extra- High Voltage Submarine Cables

Du Zhao- bin1 Yang Ze- ming2 Chen Jun2 Qiu You- qiang2 Liang Jing- cheng2 Niu Hai- qing1   

  1. 1.School of Electric Power,South China University of Technology,Guangzhou 510640,Guangdong,China;2.EHV Power Transmission Company of China Southern Power Grid,Guangzhou 510620,Guangdong,China
  • Received:2013-04-26 Revised:2013-09-25 Online:2013-12-25 Published:2013-11-19
  • Contact: 杜兆斌(1977-)，男，博士，讲师，主要从事电力系统分析运行与控制研究． E-mail:epduzb@scut.edu.cn
  • About author:杜兆斌(1977-)，男，博士，讲师，主要从事电力系统分析运行与控制研究．
  • Supported by:

    国家 “863” 计划项目(2011AA05A120)， 华南理工大学 “学生研究计划” 项目(SRP)

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Abstract:

Due to the existence of remarkable current leakage in extra- high voltage submarine cables,the traditio-nal methods to calculate the induced current of cable sheath cannot be utilized directly.In this paper,according tothe structure characteristics and grounding mode of the extra- high voltage submarine cables of Hainan Interline Pro-ject,a new method to theoretically calculate the circulating current of sheath,which takes into consideration thespatial axial current distribution of long submarine core,is proposed,and the mathematical formula of the inductiveelectromotive force of sheath- armor layer of the cable is deduced based on the electromagnetic field theory and thecircuit laws.The results of both the on- site test and the PSCAD/EMTDC simulation demonstrate that the proposedmethod is feasible and effective,and that it may serve as an applicable method for the theoretical loss analysis ofsubmarine cables.

Key words: extra- high voltage submarine cable, sheath, circulating current, leakage current, theoretical calcula-tion