Watt-hour metering characteristics at scott transformer in AC electric railway systems

Hansang Lee, Kyebyung Lee, Kisuk Kim, Yong Up Park, Young Soo Jeon, Sung-Kwan Joo, Gilsoo Jang, Chang Hyun Park

Research output: Contribution to journalArticlepeer-review


Owing to the consistent increase in accurate analysis issue for energy consumption of the AC electric railway systems, there is controversy about the adequacy of the present watt-hour metering configuration. Due to the unusual load characteristics and facilities, the discussions have not been active. Therefore, in order to achieve more accurate watt-hour metering for AC electric railway system, this paper proposes numerical formulas for watt-hour metering that reflects the highly-varying characteristics of the railway load and the structural characteristics of the Scott transformer. The proposed formulas have been verified by comparison with site-measured data, and a more suitable metering configuration for AC railway system has been proposed.

Original languageEnglish
Pages (from-to)1398-1406
Number of pages9
JournalJournal of Electrical Engineering and Technology
Issue number3
Publication statusPublished - 2018 May 1


  • AC electric railway system
  • Highly-varying load characteristics
  • Regenerative power
  • Scott connection
  • Scott transformer
  • Watt-hour metering

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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