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 kArms 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.
Bibliographical noteFunding Information:
Manuscript received August 28, 2006. This work was supported in part by a grant from Center for Applied Superconductivity Technology of the 21st Century Frontier R&D Program funded by the Ministry of Science and Technology, Republic of Korea. J. Sim and H. G. Lee are with the Department of Materials Science & Engineering, Korea University, Seoul, 136-178 Korea (e-mail: email@example.com. kr). S.-W. Yim, I. Choi, H.-R. Kim, and O.-B. Hyun are with the Superconductivity & Applications Group, Korea Electric Power Research Institute, Daejeon, Korea. H. M. Kim is with Korea Electrotechnology Research Institute, Changwon, Korea. K. B. Park, B. W. Lee, and I. S. Oh are with Electrotechnology R&D Center of LS Industrial Systems, Cheongju, Korea. F. Breuer and J. Bock are with Nexans SuperConductors GmbH, D 50351 Hürth, Germany. Color versions of one or more of the figures in this paper are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/TASC.2007.899207 Fig. 1. The quench mechanism of the SFCL using Bi-2212 bulk coil and shunt coil. (a) Before the quench generation; (b) after the quench generation.
- Bi-2212 bulk coil
- Shunt coil
- Superconducting fault current limiter
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering