A procedure for detailed assessment of ground fault-current distribution in transmission networks

M. Coppo, R. Turri, H. Griffiths, N. Harid, A. Haddad

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

Ground Potential Rise (GPR) evaluation under fault conditions is important for the evaluation of electric safety for human beings in electric networks. Current national and international standards recommend this evaluation based on a set of worst-case conditions and adopt a simplified fault current distribution calculation procedure. Such an approach may lead to considerable over-design of grounding systems. To address these issues, and move towards a comprehensive probabilistic evaluation of risk, a more detailed model of the electric network is required. This paper describes the application of the multi-conductor modelling approach to a transmission network. The method is applied to a portion of the UK transmission network and the fault current and its distribution among the phases, earth wire and ground is evaluated for three example fault positions. It is found from these preliminary studies that important intricacies of the network model such as the position of the fault along the line and the substation bus section status affect greatly the fault current distribution while the overall fault current magnitude remains substantially the same for the same loading and generation assumption.

Original languageBritish English
Title of host publicationProceedings - 2016 51st International Universities Power Engineering Conference, UPEC 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1-6
Number of pages6
ISBN (Electronic)9781509046508
DOIs
StatePublished - 2 Jul 2016
Event51st International Universities Power Engineering Conference, UPEC 2016 - Coimbra, Portugal
Duration: 6 Sep 20169 Sep 2016

Publication series

NameProceedings - 2016 51st International Universities Power Engineering Conference, UPEC 2016
Volume2017-January

Conference

Conference51st International Universities Power Engineering Conference, UPEC 2016
Country/TerritoryPortugal
CityCoimbra
Period6/09/169/09/16

Keywords

  • Ground Potential Rise
  • Grounding
  • power system faults
  • Power system modelling

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