A study on peak power reduction using regenerative energy in railway systems through DC subsystem interconnection

Seungmin Jung, Hansang Lee, Kisuk Kim, Hosung Jung, Hyungchul Kim, Gilsoo Jang

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Owing to the consistent increase in energy efficiency issues, studies for improving regenerative energy utilization have been receiving attention in the Urban DC railway systems, where currently, the utilization of regenerative energy is low due to the lack of a specific plan for using this energy. The regenerative energy in railway systems has a low efficiency problem which results in the increase of the catenary voltage and a possibility to create problems to the electrical devices connected to the system. This paper deals with the power integration of large urban railway subsystems to improve regenerative energy utilization where the railway subsystems are integrated with other railway subsystems to improve the energy efficiency. Through the case studies, to find the realistic effect of integrated operation, the Seoul Metro subsystems, namely Line 5 and Line 7, has been applied. Also, evaluation for the electricity cost saving has been performed by using KEPCO electricity cost table.

Original languageEnglish
Pages (from-to)1070-1077
Number of pages8
JournalJournal of Electrical Engineering and Technology
Volume8
Issue number5
DOIs
Publication statusPublished - 2013

Keywords

  • DC railway
  • Integrated system
  • Peak power reduction
  • Regenerative braking
  • Regenerative energy

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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