DocumentCode :
1975670
Title :
Quench Protection System for KSTAR Superconducting Coil
Author :
Song, Inho ; Cho, Moohyun
Author_Institution :
POSCON Corp., Seoul
fYear :
2007
fDate :
4-7 June 2007
Firstpage :
949
Lastpage :
952
Abstract :
This paper presents two-stage high-power mechanical-thyristor switches developed as 40 kA DC circuit breakers for the superconducting coil quench protection system. An advanced switching system used in the quench protection should allow multi-shot mode of operation without maintenance and long lifetime with arcless DC current commutation. The system is designed to combine the advantages of the both mechanical and thyristor switches. The mechanical stage is to conduct DC current for normal superconducting coil operation and the thyristor stage is to provide fast arcless DC current interruption for quench protection. Compared with the all solid- state switches and vacuum interrupters with equal capabilities the proposed switch is much cheaper than the DC breakers and has lower power dissipation in switch on state. Also, it is much faster than the vacuum interrupters. The system is designed to break 40 kA DC current within 150 ms.
Keywords :
circuit breakers; commutation; power semiconductor switches; superconducting coils; thyristor applications; DC circuit breaker; KSTAR superconducting coil; arcless DC current commutation; current 40 kA; mechanical-thyristor switch; multishot mode operation; quench protection system; Circuit breakers; Plasma confinement; Protection; Resistors; Superconducting coils; Superconducting magnets; Switches; Switching circuits; Thyristors; Tokamaks;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Industrial Electronics, 2007. ISIE 2007. IEEE International Symposium on
Conference_Location :
Vigo
Print_ISBN :
978-1-4244-0754-5
Electronic_ISBN :
978-1-4244-0755-2
Type :
conf
DOI :
10.1109/ISIE.2007.4374725
Filename :
4374725
Link To Document :
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