Since resistive superconducting fault current limiters (SFCLs) are inserted to a power system directly, it is necessary to recover instantly after the clearance of a fault. Most resistive SFCLs using BSCCO bulk or thick film have a recovery time of tens of seconds. An SFCL using YBCO coated conductor (CC) has a large surface area contacted to liquid nitrogen. Joule heat flux of the SFCL is smaller than that of other types when a fault occurs. Therefore, it is important for the SFCL employing CC to investigate a recovery time. In this paper, the recovery characteristics of SFCL with respect to applied voltage were analysed in a power system. All tests were performed in liquid nitrogen and sub-cooled nitrogen. From this result, the parameters for recovery time were obtained.
Bibliographical noteFunding Information:
Manuscript received August 29, 2006. 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. M. C. Ahn is with Korea Electrical Engineering & Science Research Institute, 56-1 Shinlim-dong, Kwanak-gu, Seoul, Korea (e-mail: email@example.com). D. K. Park, S. E. Yang, M. J. Kim, J.-W. Park and T. K. Ko are with the School of Electrical and Electronic Eng., Yonsei University, Seoul, Korea (e-mail: firstname.lastname@example.org). H.-M. Chang is with Cryogenic Engineering Lab., Hongik University, Seoul, Korea (e-mail: email@example.com). Y. S. Yoon is with the Dept. of Electrical Engineering, Ansan College of Technology, Ansan, Korea (e-mail: firstname.lastname@example.org). B.-Y. Seok is with the Electro-Mechanical Research Institute, Hyundai Heavy Industries Co., Ltd., Yongin, 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.2007.898128 Fig. 1. Re-closing in the distribution power system. (a) Model for distribution power grid; (b) voltage waveform by re-closing when a persistent fault occurs.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering