Fault current tests of a 5-m HTS cable

The first industrial demonstration of a three-phase, HTS power transmission cable at the Southwire manufacturing complex is in progress. One crucial issue during operation of the 30-m HTS cables is whether they can survive the fault current (which can be over an order of magnitude higher than the op...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2001-03, Vol.11 (1), p.1785-1788
Main Authors: Lue, J.W., Barber, G.C., Demko, J.A., Gouge, M.J., Stovall, J.P., Hughey, R.L., Sinha, U.K.
Format: Article
Language:English
Subjects:
Applied sciences
Cables
Circuit faults
Circuit testing
Coolants
CRITICAL CURRENT
Cryogenics
CURRENT LIMITATION
Electric connection. Cables. Wiring
Electric potential
Electrical engineering. Electrical power engineering
ELECTRICAL FAULTS
Exact sciences and technology
FAULT CURRENT
Fault currents
Faults
High temperature superconductors
HIGH-TC SUPERCONDUCTORS
HIGH-TEMPERATURE SUPERCONDUCTI
Manufacturing industries
Performance evaluation
PERFORMANCE TESTING
POWER TRANSMISSION
POWER TRANSMISSION AND DISTRIBUTION
Simulation
SUPERCONDUCTING CABLES
Superconductivity
Various equipment and components
Voltage
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Summary:The first industrial demonstration of a three-phase, HTS power transmission cable at the Southwire manufacturing complex is in progress. One crucial issue during operation of the 30-m HTS cables is whether they can survive the fault current (which can be over an order of magnitude higher than the operating current) in the event of a short circuit fault and how HTS cables and the cryogenic system would respond. Simulated fault-current tests were performed at ORNL on a 5-m cable. This single-phase cable was constructed in the same way as the 30-m cables and is also rated for 1250 A at 7.2 kV AC line-to-ground voltage. Tests were performed with fault-current pulses of up to 15 kA (for 0.5 s) with pulse lengths of up to 5 s (at 6.8 kA). Although a large voltage drop was produced across the HTS cable during the fault-current pulse, no significant changes in the coolant temperature, pressure, or joint resistance were observed. The cable survived all 15 simulated fault-current shots without any degradation in its V-I characteristics.
ISSN:1051-8223
1558-2515
DOI:10.1109/77.920132