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Proposal of flux‐lock‐type fault current limiter with high‐ T C superconducting element
Author(s) -
Matsumura Toshiro,
Uchii Toshiyuki,
Yokomizu Yasunobu
Publication year - 1999
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/(sici)1520-6416(19990415)127:1<31::aid-eej4>3.0.co;2-w
Subject(s) - fault current limiter , current limiting , limiter , superconductivity , materials science , electrical impedance , voltage , limiting , limiting current , electrical engineering , mechanics , condensed matter physics , engineering , physics , mechanical engineering , thermodynamics , electric power system , power (physics) , electrode , quantum mechanics , electrochemistry
Abstract This paper proposes a new type of fault current limiter (FCL), which consists of a high‐ T C superconducting (HTS) element and two coils wound on the same core without any leakage magnetic flux. In this FCL, either the limiting impedance or the initial limiting current level can be controlled by adjusting the inductances and the winding direction of the coils. Therefore, this FCL could relax the material restrictions on high‐ T C superconducting FCL. A current‐limiting experiment by a model FCL was carried out, and the limiting performance was observed. The initial limiting current level of the model FCL was 1.7 times higher than the critical current of the HTS element, and the fault current is suppressed to 52% immediately after the short‐circuit in the test. Considering voltage–current characteristics of a high‐ T C superconductor in a computer simulation, the calculated results almost agreed with the experimental results. © 1999 Scripta Technica, Electr Eng Jpn, 127(1): 31–38, 1999