An Algorithm to Analyze Rail Potential Rise in DC Traction Power Supply System

레일전위상승 분석을 위한 컴퓨터 알고리즘

  • 정상기 (한국철도기술연구원 전철전력연구실) ;
  • 김형철 (한국철도기술연구원 전철전력연구실) ;
  • 정호성 (한국철도기술연구원 전철전력연구실) ;
  • 권삼영 (한국철도기술연구원 전철전력연구실)
  • Published : 2009.10.30


An algorithm and a computer software are developed for the analysis of rail potential rise. The algorithm is intended to be integrated with the traction power system simulation program. In the algorithm, rail potentials are obtained by two step process. First the injection currents to the negative rail are obtained from load-flow study. In the next step, a network consisting of negative rail and the injection currents are constructed. Leakage resistance to ground are added to the network. And the network is analyzed for rail potentials. A software is developed to verify the validity of the algorithm. The result of the software is compared with the Simulink/SymPower circuit analysis result. The differences between the two results are with the acceptable range. The advantage of this algorithm is that it can be integrated with the existing traction power supply simulation program easily, which usually ignores negative rail's leakage resistance.


  1. Jian Guo Yu B.Sc.(1992), "Computer Analysis of touch voltages and stray currents for DC railways," thesis for Ph.D. University of Birmingham, July
  2. Kinh D. Pham, Palph S. Thomas, Walt E. Stinger(2003), "Operational and safety considerations in designing a light rail DC traction electrificatin system," pp.171-189,Proceedings 2003 IEEE/ASME Joint Rail Conference