50-m long HTS conductor for power cable

Author

Mukoyama, S. ; Miyoshi, K. ; Tsubouti, H. ; Mimitra, M. ; Uno, N. ; Ichtyanagi, N. ; Tanaka, Y. ; Ikeda, M. ; Ishii, H. ; Honjo, S. ; Sato, Y. ; Hara, T. ; Iwata, Y.

Author_Institution

Furukawa Electr. Co. Ltd., Chiba, Japan

Volume

7

Issue

2

fYear

1997

fDate

6/1/1997 12:00:00 AM

Firstpage

1069

Lastpage

1072

Abstract

The long conductor fabrication is one of key technologies to realize the High-T/sub c/ superconducting power cable. A 50-m long conductor was fabricated by helically winding the High-T/sub c/ superconducting tape onto a former with a winding machine. The conductor consisted of ten layers of Ag-sheathed Bi-2223 tape which had a high critical current density of 10,000 A/cm/sup 2/ (at 77 K). AC losses and layer-by-layer current distribution were measured, feeding AC current of 100 to 2,000 Arms to the conductor cooled by LN2. The results showed that most of the current flowed in the outer layers where the impedance was low, and that AC losses were remarkably reduced by making the current distribution uniform.

Keywords

bismuth compounds; critical current density (superconductivity); high-temperature superconductors; silver; superconducting cables; superconducting tapes; winding (process); 50 m; AC loss; Ag-sheathed Bi-2223; Bi/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O-Ag; HTS power cable; LN2 cooling; critical current density; current distribution; helical winding; high-T/sub c/ superconducting tape; long conductor fabrication; Conductors; Critical current density; Current distribution; Fabrication; High temperature superconductors; Machine windings; Power cables; Superconducting cables; Superconducting epitaxial layers; Superconducting films;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.614709

Filename

614709