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Influence of distributed compensation on earth fault protection in cable distribution systems

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Author

Summary, in English

The growing use of underground cables in distribution systems increases the capacitive coupling of the network to earth and as a consequence the capacitive earth fault current. In rural systems consisting of long cable feeders the extensive reactive current transportation gives rise to resistive losses that influence the earth fault protection. Simulations carried out in this work suggest the resistive losses disable sensitive earth fault protection in centrally compensated resonant earthed neutral systems unless unconventional low earth fault protection thresholds are applied. The introduction of distributed compensation will decrease the reactive current transportation and associated resistive losses. Distributed compensation will enable the use of sensitive earth fault protection using conventional protection thresholds.

Publishing year

2008

Language

English

Pages

615-620

Publication/Series

Developments in Power System Protection, 2008. DPSP 2008. IET 9th International Conference on

Document type

Conference paper

Topic

  • Other Electrical Engineering, Electronic Engineering, Information Engineering

Keywords

  • fault currents
  • underground cables
  • earthing
  • Power transmission lines and cables
  • Power system protection

Conference name

The 9th International Conference on Developments in Power System Protection (DPSP 2008)

Conference date

2008-03-17

Conference place

Glasgow, United Kingdom

Status

Published

ISBN/ISSN/Other

  • ISBN: 978-0-86341-902-7