Critical Current Degradation in HTS Tapes for Superconducting Fault Current Limiter under Repeated Overcurrent

被引:2
作者
Hajdasz, Sylwia [1 ]
Kempski, Adam [1 ]
Solak, Krzysztof [2 ]
Marc, Maciej [3 ]
Rusinski, Jacek [4 ]
Szczesniak, Pawel [1 ]
机构
[1] Univ Zielona Gora, Inst Automat Control Elect & Elect Engn, Ul Prof Z Szafrana 2, PL-65417 Zielona Gora, Poland
[2] Wroclaw Univ Sci & Technol, Fac Elect Engn, Wyb Wyspianskiego 27, PL-50370 Wroclaw, Poland
[3] Univ Zielona Gora, Inst Phys, Ul Prof Z Szafrana 4a, PL-65069 Zielona Gora, Poland
[4] Ekoenergetyka Polska SA, Ul Nowy Kisielin Rozwojowa 7A, PL-66002 Zielona Gora, Poland
来源
APPLIED SCIENCES-BASEL | 2023年 / 13卷 / 07期
关键词
superconducting tapes; superconducting fault current limiter; SFCL;
D O I
10.3390/app13074323
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Superconducting fault current limiters (SFCL) can be an alternative to conventional devices limiting short-circuit currents in power systems. SFCL use high-temperature superconducting tapes of the second generation (HTS 2G) in SFCL, which, after reaching the characteristic critical current of the tape, go into the resistive state (quenching), limiting the short-circuit current. The critical current determines the moment of activation of the SFCL. Therefore, its value should not change during the operation of the device due to repeated limitation of short-circuit currents. The constancy of the critical current is a prerequisite for proper cooperation with the power system protection devices. Multiple quenching can cause microdamage in the superconducting layers responsible for lowering of the value of the critical current of the HTS tapes. The article presents the research results on the degradation processes of 2G HTS tapes intended for the construction of SFCL due to the action of prospective short-circuit currents with values exceeding the critical current of the tested tapes. The decrease in the value of the critical current of the HTS tape as a result of multiple transitions to the resistive state was investigated. The amount of energy emitted during the test current pulse of 0.2 s duration was determined. The limitation values of the voltage drop on the tape, which does not cause accelerated degradation processes, were defined. The microstructural tests of cross-sections of new HTS tapes subjected to prospective short-circuit currents were performed.
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页数:19
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