Quench current degradation in superconducting coil for 6.6 kV/2 fault current limiter

Journal Article · Mon Jul 01 04:00:00 EDT 1996 · IEEE Transactions on Magnetics

DOI:https://doi.org/10.1109/20.511358· OSTI ID:287656

Tasaki, K; Yazawa, T; Yoneda, E S; Nomura, S; Maeda, H ^[1]; Ohkuma, T; Nakade, M; Hara, T ^[2]

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1. Toshiba Corp., Kawasaki (Japan). Research and Development Center
2. Tokyo Electric Power Co., Yokohama (Japan). Power Engineering R and D Center

A 6.6 kV/2 kA class fault current limiter that consists of non-inductive superconducting windings was developed and tested. The limiter can deliver continuous power at 2 kArms and limit fault current of more than 20 kA to 4 kA in 6 kV. The limiter recovers to the superconducting state within a few seconds and can perform a fault current limiting operation in 60 seconds after the last limiting operation. After high-voltage operation, however, the quench current of the limiter dropped significantly. This quench current degradation is related to the coil bobbin strain due to helium pressure raised by large ohmic heating in quenching. The degradation is a fatal problem for a fault current limiter if the quench current falls below the operating current because the limiter cannot revert to the normal operation. High Young`s modulus bobbin is effective to remove the coil degradation. They have obtained a fault current limiter without any degradation after repeated limiting operations.

• OSTI ID: 287656
• Report Number(s): CONF-950691--
• Journal Information: IEEE Transactions on Magnetics, Journal Name: IEEE Transactions on Magnetics Journal Issue: 4Pt1 Vol. 32; ISSN IEMGAQ; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
CURRENT LIMITERS
DESIGN
ELECTRICAL FAULTS
PERFORMANCE
POWER SYSTEMS
QUENCHING
RESEARCH PROGRAMS
SUPERCONDUCTING CABLES
SUPERCONDUCTING COILS