Study using multi-port modeling to predict rail potential and stray current in DC electrified railway

Hwan Su Jung, Chang Mu Lee, Gil Soo Jang

Research output: Contribution to journalArticlepeer-review


Since DC power supply systems use a run rail for current return, leakage current is generated between the rail and the ground, thereby raising the rail potential. Increases in rail potential can cause human safety accidents, and leakage currents cause corrosion in metals near rails. Therefore, it is important to predict the magnitude of the leakage current and the rail potential in DC power supply systems. There are various analytical methods to predict the leakage current and the rail potential, but it is difficult to increase the dimension of the equation or to interpret it according to the location of the vehicle. In this paper, we propose an analytical method using multi-port modeling for the components of a DC electrified railway (DC substation, catenary line, train, rail to ground resistance) that can complement the existing analytical method and show a simple analysis example that predicts leakage current and rail potential using this method.

Original languageEnglish
Pages (from-to)445-454
Number of pages10
JournalJournal of the Korean Society for Railway
Issue number5
Publication statusPublished - 2018

Bibliographical note

Publisher Copyright:
© 2018 The Korean Society for Railway. All rights reserved.


  • DC electrified railway
  • Multi-port modeling
  • Rail potential
  • Stray current

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Geography, Planning and Development
  • Automotive Engineering
  • Transportation
  • Energy Engineering and Power Technology
  • Strategy and Management


Dive into the research topics of 'Study using multi-port modeling to predict rail potential and stray current in DC electrified railway'. Together they form a unique fingerprint.

Cite this