Characteristics of a Bi-2212 Monofilar Superconducting Fault Current Limiting Element

Author

Jin, H.B. ; Li, Z.Y. ; Ma, Y.H. ; Ryu, K. ; Park, K.B. ; Oh, I.S.

Author_Institution

Dept. of Electr. Eng., Chonnam Nat. Univ., Kwangju, South Korea

Volume

19

Issue

3

fYear

2009

fDate

6/1/2009 12:00:00 AM

Firstpage

1847

Lastpage

1850

Abstract

The Bi-2212 monofilar bulk element was selected as a candidate in developing a 24 kV/630 A class superconducting fault current limiting (SFCL) system. This study investigated the Bi-2212 monofilar element both experimentally and theoretically regarding the DC voltage-current characteristics, AC loss characteristics, inductance, current limiting characteristics and local temperature distribution. It was found that the critical current of the Bi-2212 monofilar element increased 3.3 times as the operation temperature decreased from 77 K to 65 K. Although the arrangement of the Bi-2212 conductor was a coil shape, the measured AC loss was at a level similar to what is calculated from the Norris equation at both the temperatures 77 K and 65 K. The temperatures measured at each section during a fault were in good agreement with the results of the numerical analysis. Moreover, the results showed that the monofilar element was not yet sufficiently homogeneous to be used at its full rated voltage.

Keywords

fault current limiters; numerical analysis; AC loss characteristics; DC voltage-current characteristics; Norris equation; bi-2212 monofilar bulk element; current 630 A; local temperature distribution; numerical analysis; superconducting fault current limiting system; temperature 65 K; temperature 77 K; voltage 24 kV; AC loss; Bi-2212 bulk; fault current limiting characteristics; local temperature distribution; monofilar element; superconducting fault current limiting element;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2009.2017837

Filename

5067118