Overhead transmission conductor sag: A novel measurement technique and the relation of sag to real time circuit ratings

C. Mensah-Bonsu, G. T. Heydt

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

This article deals with overhead transmission conductor sag. The design, construction, instrumentation, and testing of a differential global positioning satellite (DGPS) system-based instrument for the measurement of conductor sag is proposed. Inherent and intentional errors in GPS technologies are discussed, and the DGPS method is described for accuracy enhancement. A DGPS-based overhead conductor-sag measuring instrument has been designed, constructed, and subjected to selected laboratory bench and power substation testing. A method to measure directly the physical sag of overhead conductors is described. The main advantage of the concept is the real-time direct measurement of a parameter (i.e., conductor sag) needed for the operation of the transmission system without intermediate measurement of conductor tension, temperature, and ambient weather conditions.

Original languageEnglish (US)
Pages (from-to)61-69
Number of pages9
JournalElectric Power Components and Systems
Volume31
Issue number1
DOIs
StatePublished - Jan 1 2003

Keywords

  • Conductor sag instrument
  • Dynamic thermal line rating
  • Global positioning satellite system
  • Overhead conductor sag

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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