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

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 substat...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2012-06, Vol.22 (3), p.5600604-5600604
Main Authors: SHIN, Hee-Sang, CHO, Sung-Min, KIM, Jae-Chul
Format: Article
Language:English
Subjects:
Applied sciences
Automatic power changeover switch
Circuit faults
Connection and protection apparatus
electric railway
Electrical engineering. Electrical power engineering
Electrical power engineering
Electronics
Exact sciences and technology
Fault current limiters
Fault currents
Faults
Ground, air and sea transportation, marine construction
Impedance
Miscellaneous
Power networks and lines
Power substations
Rail transportation
Railroads
Railway engineering
Railway transportation and traffic
Railways
Scott transformer
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
SFCL
Substations
Superconducting devices
Superconductivity
Switches
Traction
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Summary: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.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2011.2174812