Title :
DC power system for superconducting fusion test facility LHD
Author :
Chikaraishi, H. ; Tanahashi, S. ; Yamada, S. ; Motojima, O. ; Satoh, T. ; Niwa, H. ; Uede, T. ; Hiue
Author_Institution :
Nat. Inst. for Fusion Sci., Gifu, Japan
Abstract :
The Large Helical Device (LHD) is a fusion plasma test facility that has three sets of superconducting helical coils and three sets of superconducting poloidal coils. This paper introduces a power system to excite these coils. The system consists of large current thyristor rectifiers, quench protection circuits, control system and superconducting DC power feeders. Several components are developed for this power system. A DC circuit breaker using a small power fuse and a vacuum circuit breaker realize a compact and low cost quench protection circuit. A superconducting DC power feeder, that joins the power supply and a coil, moves a large cryogenic joint box to far away from the LHD main structure
Keywords :
electric fuses; power supplies to apparatus; rectifying circuits; stellarators; superconducting coils; thyristor convertors; vacuum circuit breakers; DC circuit breaker; DC power system; Large Helical Device; control system; cryogenic joint box; current thyristor rectifiers; power fuse; quench protection circuits; superconducting DC power feeders; superconducting fusion test facility; superconducting helical coils; superconducting poloidal coils; vacuum circuit breaker; Circuit breakers; Control systems; Fuses; Plasma devices; Power system protection; Power systems; Rectifiers; Superconducting coils; Test facilities; Thyristors;
Conference_Titel :
Power Conversion Conference - Nagaoka 1997., Proceedings of the
Conference_Location :
Nagaoka
Print_ISBN :
0-7803-3823-5
DOI :
10.1109/PCCON.1997.638304
