Voltage uprating of overhead transmission lines

R. Bhattarai, A. Haddad, H. Griffiths, N. Harid

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

12 Scopus citations

Abstract

In recent years, uprating of existing overhead power line has become a popular option for electric utilities to address increasing demand for power. Uprating overhead line by increasing voltage allows considerable increase in power transfer capability. This paper initially examines technical issues and conventional methods of uprating the voltage of overhead transmission lines. It then considers a case of existing 275kV line in L3 tower to analyse these issues and propose appropriate process for its possible uprating to 400kV system. In this case, phase-to-earth clearance was found to be a key issue for voltage uprating. Application of line surge arresters along the line was proposed for controlling overvoltage thereby reducing the minimum required clearance for 400kV system.

Original languageBritish English
Title of host publication2010 45th International Universities' Power Engineering Conference, UPEC 2010
StatePublished - 2010
Event2010 45th International Universities' Power Engineering Conference, UPEC 2010 - Cardiff, United Kingdom
Duration: 31 Aug 20103 Sep 2010

Publication series

NameProceedings of the Universities Power Engineering Conference

Conference

Conference2010 45th International Universities' Power Engineering Conference, UPEC 2010
Country/TerritoryUnited Kingdom
CityCardiff
Period31/08/103/09/10

Keywords

  • Backflashover
  • Clearance
  • Current uprating
  • Insulation coordination
  • Lightning impulse
  • Overvoltage
  • Shielding failure
  • Surge arrester
  • Transmission line
  • Voltage uprating

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