https://doi.org/10.1140/epjs/s11734-025-01489-z
Regular Article
Safe operating area (SOA) of stacked conductor with Bi-2223 tapes under fault inrush current: a temperature-dependent model
1
Center for Fusion Science, Southwestern Institute of Physics, 610225, Chengdu, China
2
Superconductivity and New Energy R&D Center, Southwest Jiaotong University, 610031, Chengdu, China
Received:
7
August
2024
Accepted:
26
January
2025
Published online:
10
April
2025
Advancements in the electrical performance of high-temperature superconductor (HTS) tapes have led to an enhancement in their transport current capacity, particularly under high magnetic fields. However, HTS materials have a strong dependence on magnetic field and temperature. The analysis of thermal behavior in stacked conductors under overcurrent is crucial for ensuring safe operation. In this paper, the safe operation area (SOA) of stacked conductor with Bi-2223 tapes under inrush current is investigated by electromagnetic-thermal multi-physics simulation model. To ensure the maximum temperature rise of the stacked conductor remains below the critical temperature of 110 K under various overcurrent conditions. The results show that the fault duration of stacked conductor should be less than 0.26 s under the inrush current of 3000 A. The SOA of the stacked conductor is fitted to a numerical power function regarding the lasting duration and inrush current amplitude. The newly-developed SOA model offers scientists and engineers a smart tool to design and optimize the high-current HTS conductor for safe operation.
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Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
