Fault Current Tests of a 5-m HTS Cable

Conference · Mon Feb 19 04:00:00 EST 2001

DOI:https://doi.org/10.1109/77.920132· OSTI ID:775423

Lue, J W ^[1]

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1. ORNL

The first industrial demonstration of a three-phase high-temperature superconducting transmission power cable at the Southwire manufacturing complex is in progress. One crucial issue during operation of the 30-m HTS cables is whether they could 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 15 simulated fault-current shots without any degradation in its V-I characteristics.

• Research Organization: Oak Ridge National Lab., TN (US)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: AC05-96OR22464
• OSTI ID: 775423
• Report Number(s): P01-109909
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
CRITICAL CURRENT
CURRENT LIMITATION
ELECTRICAL FAULTS
FAULT CURRENT
HIGH-TC SUPERCONDUCTORS
HIGH-TEMPERATURE SUPERCONDUCTI
PERFORMANCE TESTING
POWER TRANSMISSION
SUPERCONDUCTING CABLES