Transposition and voltage unbalance in high phase order power transmission systems

Brian J. Pierre, Gerald T. Heydt

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

High phase order systems have been proposed at the early inception of power transmission engineering, but few direct applications have been made. High phase order transmission should be considered as an alternative in the case of high power density applications. In this article, an analysis of transposition of high phase order overhead transmission lines is presented and voltage unbalance in high phase order systems is considered. Definitions are presented for "fully transposed" and "roll transposed" along with advantages and disadvantages of each. A generalized voltage unbalance factor is introduced and utilized to determine the benefits of transposition. The generalized voltage unbalance factor is compared with three other possible unbalance factors to determine if the generalized voltage unbalance factor is an appropriate indication of unbalance. Exemplary results are presented for 6-phase and 12-phase designs. Conclusions show that the generalized voltage unbalance factor is a good indication of transmission line voltage unbalance and certain configurations may not need full rotation transposition to minimize the unbalance factor. The transposition analysis and voltage unbalance are considerations in the assessment of high phase order as a high power transmission alternative.

Original languageEnglish (US)
Pages (from-to)1754-1761
Number of pages8
JournalElectric Power Components and Systems
Volume42
Issue number15
DOIs
StatePublished - Nov 20 2014

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Keywords

  • 12-phase
  • 6-phase
  • high phase order
  • power transmission
  • transmission engineering
  • transmission line transposition
  • transposition
  • voltage unbalance
  • voltage unbalance factor

ASJC Scopus subject areas

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

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