Monitoring sag and tension of a tilted transmission line using geometric transformation

Sunita Malhara, Vijay Vittal

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

6 Scopus citations

Abstract

The electrical transmission infrastructure, in the US has witnessed severe environmental hazards, accidents and in countries like Columbia, Pakistan, and India malicious attacks leading to the sabotage of transmission towers. The physical security of the national electric grid has largely been evaluated through examination of the effect of the physical disruption on the associated electrical quantities. To ensure safe and reliable operation of the power system, detection of tower tilt and its effect on the sag and tension at the initial stage of the disruption is indispensable. The use of the concept of geometric transformation for each phase of a tilted tension section of a high voltage transmission line to evaluate line sag-tension is proposed. The accuracy of the method is compared with the more complex, nonlinear finite element method used in PLS-CADD software. Different combinations of tangent towers tilt in a tension section are studied for sag-tension calculation including conductor temperature effect. Appropriate warning alarms are generated in case of considerable changes in the sag-tension values or violations of limits, enabling operators to take designated actions in initial stages of the physical disruption.

Original languageEnglish (US)
Title of host publication2009 IEEE Power and Energy Society General Meeting, PES '09
DOIs
StatePublished - Dec 1 2009
Event2009 IEEE Power and Energy Society General Meeting, PES '09 - Calgary, AB, Canada
Duration: Jul 26 2009Jul 30 2009

Publication series

Name2009 IEEE Power and Energy Society General Meeting, PES '09

Other

Other2009 IEEE Power and Energy Society General Meeting, PES '09
CountryCanada
CityCalgary, AB
Period7/26/097/30/09

Keywords

  • Conductor sag
  • Geometric transformation
  • PLS-CADD
  • Tension
  • Tower tilt

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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