Application of the global positioning system to the measurement of overhead power transmission conductor sag

Chris Mensah-Bonsu, Ubaldo Fernández Krekeler, Gerald Thomas Heydt, Yuri Hoverson, John Schilleci, Baj L. Agrawal

Research output: Contribution to journalArticle

50 Scopus citations


This paper describes a method to directly measure the physical sag of overhead electric power transmission conductors. The method used relies on the global positioning system (GPS) used in the differential mode. The direct measurement of sag is a main advantage of the concept. The digital signal processing required is described in detail in a four-level configuration. Typical accuracy, response time, problems, strengths, and weaknesses of the method are also described.

Original languageEnglish (US)
Pages (from-to)273-278
Number of pages6
JournalIEEE Transactions on Power Delivery
Issue number1
StatePublished - Jan 1 2002



  • Conductor clearance warning
  • Conductor sag
  • Dynamic thermal line rating
  • Global positioning system (GPS)
  • Open Access Same Time Information System (OASIS)
  • Overhead conductors
  • Transmission engineering

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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