Title :
Application on of SFCL in Automatic Power Changeover Switch System of Electric Railways
Author :
Hee-Sang Shin ; Sung-Min Cho ; Jae-Sun Huh ; Jae-Chul Kim ; Dong-Jin Kweon
Author_Institution :
Sch. of Electr. Eng., Soongsil Univ., Seoul, South Korea
fDate :
6/1/2012 12:00:00 AM
Abstract :
This paper proposes automatic power changeover switch system applied superconducting fault current limiter (SFCL) of the Korea electric railway using 25 kV-AC Scott transformer. The electric railway needs neutral section to separate two different electrical power phase to m phase and t phase. While the train passes through the neutral section, the electrical power supply phase is changed over to other phase. And that time, the train must turn off the circuit breaker to avoid transient as `inrush-current´ and `arc´. These cause negative problems as speed decline of the train, a shorter life of the train circuit breaker. To improve the problems, the inrush current limitation method is proposed. In addition, we analysed the effect of proposed method using time-domain transient simulation software (PSCAD/ EMTDC).
Keywords :
arcs (electric); circuit breakers; locomotives; railway electrification; superconducting fault current limiters; PSCAD/EMTDC; SFCL; Scott transformer; arc; automatic power changeover switch system; circuit breaker; electric railways; electrical power phase; electrical power supply phase; inrush current limitation method; inrush-current; negative problems; superconducting fault current limiter; time-domain transient simulation software; train circuit breaker; voltage 25 kV; Circuit breakers; Circuit faults; Impedance; Rail transportation; Surge protection; Surges; Switches; Electric railway; SFCL; inrush current; neutral section;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2011.2177617