Fault Current Limitation Characteristics of Bi-2212 Bulk Coil With Different Types of Shunt Coils

Author

Sim, J. ; Lee, H.G. ; Yim, S.W. ; Choi, Inji ; Kim, H.-R. ; Hyun, O.-B. ; Kim, H.M. ; Park, K.B. ; Lee, B.W. ; Oh, I.S. ; Breuer, F. ; Bock, J.

Author_Institution

Korea Univ., Seoul

Volume

17

Issue

2

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

1879

Lastpage

1882

Abstract

We investigated fault current limitation characteristics of a resistive superconducting fault current limiter (SFCL) which consists of a Bi-2212 bulk coil and a shunt coil. For the experiments, different types of shunt-coils which had the same impedance were prepared. One group had high resistance, and the others were designed to have high inductance. The effects of the impedance component variation on current limitation characteristics of the SFCL were compared with each other. The test results showed that the SFCLs of both groups successfully limited the fault current of 7 kA_rms to below 5 kA_P right after the fault occurred. The SFCLs with a shunt coil of higher inductance quenched more uniformly, but had a high voltage spike by Ldi/dt at the first half cycle after fault. On the other hand, the ones with higher resistance quenched comparatively less uniformly, but the voltage spike was much smaller. The impedance of the shunt coil is being optimized, taking into consideration stability, insulation, its effect on the circuit and other factors.

Keywords

bismuth compounds; calcium compounds; fault current limiters; high-temperature superconductors; strontium compounds; superconducting coils; Bi-2212 bulk coil; Bi₂Sr₂CaCu₂O₈ - Interface; high inductance; impedance component variation; insulation; resistive superconducting fault current limiter; shunt coils; stability; voltage spike; Circuit faults; Circuit stability; Fault current limiters; Fault currents; Impedance; Inductance; Insulation; Superconducting coils; Testing; Voltage; Bi-2212 bulk coil; quench; shunt coil; superconducting fault current limiter;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2007.899207

Filename

4277719