Protection Scheme Using SFCL for Electric Railways With Automatic Power Changeover Switch System

Author

Hee-Sang Shin ; Sung-Min Cho ; Jae-Chul Kim

Author_Institution

Sch. of Electr. Eng., Soongsil Univ., Seoul, South Korea

Volume

22

Issue

3

fYear

2012

fDate

6/1/2012 12:00:00 AM

Firstpage

5600604

Lastpage

5600604

Abstract

In this paper, we propose a protection scheme using a superconducting fault current limiter (SFCL) for the electric railway with traction power supply system with the automatic power changeover switch (ACS) system. The Korean electric railway uses a Scott transformer with many traction power substations. Each traction power substation has a neutral section. The ACS system is being installed at the neutral section and studied. In this system, shorting between the M- and T-phases prevents phase-to-phase faults, which was not considered for the conventional AC railway, due to the ACS. The proposed protection scheme using the SFCL mitigates this problem. In addition, we analysed the effect of the proposed protection scheme using the time-domain transient simulation software PSCAD/EMTDC.

Keywords

electric vehicles; power transformers; railways; substation protection; superconducting fault current limiters; time-domain analysis; traction power supplies; AC railway; ACS system; Korean electric railway; M-phases; PSCAD-EMTDC; SFCL; Scott transformer; T-phases; automatic power changeover switch system; electric railways; neutral section; phase-to-phase faults; protection scheme; superconducting fault current limiter; time-domain transient simulation software; traction power substation; traction power supply system; Circuit faults; Fault current limiters; Fault currents; Impedance; Rail transportation; Substations; Switches; Automatic power changeover switch; SFCL; Scott transformer; electric railway;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2011.2174812

Filename

6069562