Browse > Article

Safely Evaluation on Common Grounding System for Electric Railway  

Song, Jin-Ho (명지대학 정보제어공학과)
Hwang, Yu-Mo (명지대학 정보통신계열)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers B / v.51, no.6, 2002 , pp. 298-306 More about this Journal
Abstract
We performed an safety evaluation on constructing of a common grounding system for electrical railway in view of its efficacy and technical fit. In order to compare the conventional grounding method, which has been individually conducted, with the common grounding with all ground wires connected in common to the counterpoise buried below the surface of the earth in parallel with rail, we set up scenarios with several cases of fault and load conditions in Chungbuk railway sections with the common grounding system. Based on models for railway conductors including the grounded system, line Parameters of railway power system are computed. The circuit model for power system with up and down lines, auto-transformers and railway substations is used to compute impedances of counterpoise and substation ground net. For each scenario with faults and operation conditions of railway, the induced potentials on signal and communication lines are also computed. It is shown that the common grounding for Chungbuk railway is superior experimentally to the conventional method in three respects: (1) the lower rail potentials during operation of railway in line, (2) the lower rail potentials for short-circuit faults between catenary and rail, and (3) the lower stress voltages on signal and communication lines for short-circuit or ground faults. The analysis results confirm that the grounding system for electric railway is required to be built by the common grounding and be evaluated on its safety in design.
Keywords
common grounding; electrical railway; fault and load conditions; rail Potential; stress voltage;
Citations & Related Records
연도 인용수 순위
  • Reference
1 H.S. Lee, J.H. Song, K.B. Ryu, and S.H. Chang, 'Computation of Inductive Coupling Between Electrified Railways and Communication Cables' , World Congress on Railway Research(WCRR) '99, Tokyo, Japan, Oct. 19-22, 1999
2 F. P. Dawalibi, F. Donoso, 'Integrated Analysis Software for Grounding, EMF and EMI', IEEE Computer Applications in Power, Vol. 6, No. 2, pp. 19-24, 1993   DOI   ScienceOn
3 한국철도기술공사, '충북선 조치원~봉양간 전철, 전력설비기본설계보고서(변전설비)', 1997, 11.
4 B. Mellitt, J.Allan, Z.Shao, W.Johnston, C.Goodman, 'Computer-based methods for induced-voltage calculations in AC railways' , IEE proc, Vol. 137, No. 1, Jan., 1990
5 IEEE Standard 80, 'IEEE guide for safety in AC substation grounding', 1986.
6 R. J. Hill, I.H.Cevik, 'Parallel Computer Simulation of Autotransformer-Fed AC Traction Networks', Railroad Conference, 1990   DOI
7 한승진, 정용운, 천기하, 이기서, 박영수, 유광균, '궤도회로의 전기적 특성에 관한 연구', 대한전기학회 하계학술대회, 1996.7
8 R. J. Hill, 'On-line Simulation of Voltage Regulation in Autotransformer-Fed AC Electric Railroad Traction Networks', IEEE Trans. on Vehicular Technology, Vol. 42, No. 3, Aug., 1993   DOI   ScienceOn
9 CCITT Directives, 'Inducing-currents and Voltages in Electrified Railway System', Geneva, 1989