Assessment of the impact of HTSCs on superconducting fault-current limiters

Conference · Mon Mar 01 04:00:00 EST 1993

OSTI ID:10144446

Giese, R F ^[1]; Runde, M ^[2]

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1. Argonne National Lab., IL (United States)
2. Energiforsyningens Forskningsinstitutt A/S, Trondheim (Norway)

The possible impact of nitrogen-cooled superconductors on the desip 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 advantages of operating superconductors at 77 K are 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 is several orders of magnitude Larger at 77 K and at 4 K. This phenomenon increases conductor stability against flux jumps but makes switching from the superconducting to the normal state slow and difficult. Therefore, 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); Energiforsyningens Forskningsinstitutt A/S, Trondheim (Norway)
• Sponsoring Organization: USDOE, Washington, DC (United States); Norges Almenvitenskapelig Forskningsraad, Oslo (Norway)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 10144446
• Report Number(s): ANL/ES/CP--78917; CONF-930433--4; ON: DE93009986
• Country of Publication: United States
• Language: English

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COST
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