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https://nagoya.repo.nii.ac.jp/oai
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Current Limiting and Recovery Characteristics of 2 MVA Class Superconducting Fault Current Limiting Transformer (SFCLT)
Kojima, Hiroki
Kotari, Masashi
Kito, Toyoaki
Hayakawa, Naoki
Hanai, Masahiro
Okubo, Hitoshi
open access
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Current limiting operation
fault current limiter
transformer
recovery characteristics
YBCO coated conductor
We have been developing Superconducting Fault Current Limiting Transformer (SFCLT) with the function of both superconducting transformer in steady state and superconducting fault current limiter in fault condition. As the Step-5 of SFCLT project, 2 MVA class HTS-SFCLT using YBCO coated conductors with the ratings of 22 kV/6.6 kV has been developed. One of the important concerns for the development of HTS-SFCLT is the current limiting and recovery characteristics as well as the transformer function. Thus, in this paper, current limitation and recovery tests of the HTS-SFCLT are carried out. The current limiting test have revealed that the HTS-SFCLT exhibits the excellent current limiting function as a superconducting fault current limiter, where the prospective short-circuit current IPRO=784 Apeak is reduced to 34% at the first peak and 18% at the 5th cycles. The HTS-SFCLT has been able to recover into superconducting state immediately after the fault clearance. According to the transition of generated resistance of the HTS-SFCLT, the criteria of recovery into superconducting state are quantified for different combinations of load current before the fault and prospective short-circuit current during the fault.
IEEE
2011-06
eng
journal article
AM
http://hdl.handle.net/2237/20727
https://nagoya.repo.nii.ac.jp/records/18630
https://doi.org/10.1109/TASC.2010.2089413
1051-8223
IEEE Transactions on Applied Superconductivity
21
3
1401
1404
https://nagoya.repo.nii.ac.jp/record/18630/files/2.pdf
application/pdf
317.3 kB
2018-02-21