Influence of design parameters and defects on electric field distributions inside MV cable joints

I. A. Metwally, A. H. Al-Badi, A. S. Al-Hinai, F. Al Kamali, H. Al-Ghaithi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)


This paper presents a 2d finite-element analysis for a 33-kV, three-phase, three-core cross-linked polyethylene (XLPE) underground cable (UGC) straight joint of the heat shrink type. The aim of this work is to show how the joint design parameters and different defects affect the electric field distribution, and find optimum material properties to enhance the lifetime of cable joints. This is investigated by calculating the electric field distributions and showing how the optimized selection of joint material properties can reduce the localized high electric field to avoid partial discharge activities. Several design parameters are investigated such as insulation layer's thickness and relative permittivity, and termination angles of ferrule and its insulation. In addition, size and location of different defects such as air voids, water droplets, sharp tips and delamination are examined. The paper concludes important points for proper design of medium-voltage (MV) cable joints to enhance their lifetime and hence increase the reliability of such cable systems.

Original languageEnglish
Title of host publicationProceedings of the 18th Mediterranean Electrotechnical Conference: Intelligent and Efficient Technologies and Services for the Citizen, MELECON 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781509000579
Publication statusPublished - Jun 20 2016
Event18th Mediterranean Electrotechnical Conference, MELECON 2016 - Limassol, Cyprus
Duration: Apr 18 2016Apr 20 2016


Other18th Mediterranean Electrotechnical Conference, MELECON 2016


  • cable joints
  • defects
  • electric field distribution
  • failure
  • finite element method

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Renewable Energy, Sustainability and the Environment
  • Automotive Engineering


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