According to recent studies, economical feasibility of resistive superconducting fault current limiters (FCLs) in transmission and distribution power line is confirmed. Since the SFCL is operated under alternating current (AC), it causes power loss, so-called AC loss, during normal operation condition even though it is superconductor. Bifilar pancake winding with coated conductor (CC) is expected to reduce AC loss of the SFCL by canceling magnetic fields efficiently as compared with other type SFCLs using CC in the same length. AC loss characteristic of the bifilar pancake type coil for SFCL application was investigated in this paper. Two bifilar pancake coils were wound using CC with facing on high temperature superconductor (HTS) sides each other and substrate (Ni-W) sides each other, respectively. AC losses of the coils were measured at 77 K and theoretical analysis was performed by finite element method (FEM). The experimental results are compared with the Norris equations and numerical values using FEM.
Bibliographical noteFunding Information:
Manuscript received August 29, 2007. This work was supported by a grant from the Center for Applied Superconductivity Technology of the 21st Century Frontier R&D Program funded by the Ministry of Science and Technology, Republic of Korea. D. K. Park, J. S. Bang, S. E. Yang and T. K. Ko are with the School of Electrical and Electronic Engineering, Yonsei University, Seoul, Korea (e-mail: firstname.lastname@example.org). Y. S. Yoon is with the Department of Electric Engineering, Ansan College of Technology, Ansan, Korea (e-mail: email@example.com). M. C. Ahn is with Francis Bitter Magnet Laboratory, MIT, Cambridge, MA 02139 USA (e-mail: firstname.lastname@example.org). K. Sim is with the Korea Electrotechnology Research Institute, Changwon, Korea (e-mail: email@example.com). 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.2008.920802
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering