High temperature low sag upgrades and payback for the economic operation improvement of power transmission systems

Askhat Tokombayev, Gerald Thomas Heydt

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

The increase of transmission line thermal ratings by reconductoring with high temperature low sag conductors is a comparatively new technology introduced for transmission expansion. A special design permits high temperature low sag conductors to operate at higher temperatures, therefore allowing passage of higher current and, thus, increasing the thermal rating of the transmission line. The comparatively high cost of high temperature low sag conductors may be an obstacle to its large-scale implementation. This article evaluates the expenditures for transmission line reconductoring using high temperature low sag, the consequent benefits obtained from the potential decrease in operating cost for thermally limited power transmission systems. Estimates of the "payback period" are used to evaluate the cost effectiveness of reconductoring with high temperature low sag. The evaluation is performed using a 225 bus equivalent of the 2012 summer peak Arizona portion of the Western Electricity Coordinating Council. The method is offered for transmission expansion analysis in which an economic benefit is calculated to assist in the transmission expansion decision.

Original languageEnglish (US)
Pages (from-to)345-355
Number of pages11
JournalElectric Power Components and Systems
Volume43
Issue number3
DOIs
StatePublished - Feb 7 2015

Keywords

  • High temperature low sag
  • economic efficiency
  • optimal dispatch
  • payback period
  • transmission engineering

ASJC Scopus subject areas

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

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