Assessment study of superconducting fault-current limiters operating at 77K
- Argonne National Lab., IL (United States)
- Energiforsyningens Forskningsinstitutt A/S, Trondheim (Norway)
The possible impact of nitrogen-cooled superconductors on the design and cost of superconducting fault-current limiters is assessed by considering the technical specifications such devices must meet and by comparing material properties of 77-K and 4-K superconductors. The main advantage of operating superconductors at 77 K is that the refrigeration operating cost is reduced by a factor of up to 25, and the refrigeration capital cost is reduced by a factor of up to 10. The heat capacity of 77 K is several orders of magnitude larger than at 4 K. This phenomenon increases conductor stability against flux jumps but makes switching from the superconducting to normal state slow and difficult. Consequently, a high critical current density, probably at least 10{sup 5} A/cm{sup 2}, is required.
- Research Organization:
- Argonne National Lab., IL (United States)
- Sponsoring Organization:
- USDOE; NORC; USDOE, Washington, DC (United States); Norges Almenvitenskapelig Forskningsraad, Oslo (Norway)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 5297552
- Report Number(s):
- ANL/CP-75500; CONF-920713-1; ON: DE92015273
- Resource Relation:
- Conference: Summer power meeting of the Institute of Electrical and Electronic Engineers (IEEE) Power Engineering Society (PES), Seattle, WA (United States), 12-16 Jul 1992
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
HIGH-TC SUPERCONDUCTORS
EVALUATION
LIMITERS
REFRIGERATION
COST
SUPERCONDUCTING DEVICES
COOLING SYSTEMS
CAPITALIZED COST
CRITICAL CURRENT
CURRENT DENSITY
POWER DISTRIBUTION SYSTEMS
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0065-0273 K
COOLING
CURRENTS
ELECTRIC CURRENTS
SUPERCONDUCTORS
TEMPERATURE RANGE
240201* - Power System Networks
Transmission & Distribution- AC Systems- (1990-)
665412 - Superconducting Devices- (1992-)