Comparison study of cable geometries and superconducting tape layouts for high-temperature superconductor cables |
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| Affiliation: | 1. Lawrence Berkley National Laboratory, Berkeley, CA 94720, United States;2. Fermi National Accelerator Laboratory, Batavia, IL 60510, United States;1. CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France;2. ITER Organization, Route de Vinon-sur-Verdon, 13115 Saint-Paul-lez-Durance, France;3. AVANTIS Engineering Groupe, ZI de l’Aiguille, 46100 Figeac, France;4. CNIM, ZI de Brégaillon, 83500 La Seyne-sur-Mer, France;1. National Institute for Fusion Science, 322-6 Oroshi-cho, Toki, Gifu 509-5292, Japan;2. SOKENDAI (Graduate University for Advanced Studies), 322-6, Oroshi-cho, Toki, Gifu 509-5292, Japan;3. Department of Quantum Science and Energy Engineering, Graduate School of Engineering, Tohoku University, Sendai, Miyagi 980-8579, Japan;1. State Key Laboratory of New Energy Renewable Power System, North China Electric Power University, Beijing 102206, China;2. State Nuclear Electric Power Planning Design & Research Institute Co., LTD, Beijing 100095, China;3. Changchun Automobile Industry Institute, Changchun 130013, China;1. Tohoku University, Sendai, Japan;2. National Institute for Fusion Science, Toki, Japan |
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| Abstract: | High-temperature superconductor (HTS) rare-earth-barium-copper-oxide (REBCO) tapes are very promising for use in high-current cables. The cable geometry and the layout of the superconducting tapes are directly related to the performance of the HTS cable. In this paper, we use numerical methods to perform a comparison study of multiple-stage twisted stacked-tape cable (TSTC) conductors to find better cable structures that can both improve the critical current and minimize the alternating current (AC) losses of the cable. The sub-cable geometry is designed to have a stair-step shape. Three superconducting tape layouts are chosen and their transport performance and AC losses are evaluated. The magnetic field and current density profiles of the cables are obtained. The results show that arrangement of the superconducting tapes from the interior towards the exterior of the cable based on their critical current values in descending order can enhance the cable’s transport capacity while significantly reducing the AC losses. These results imply that cable transport capacity improvements can be achieved by arranging the superconducting tapes in a manner consistent with the electromagnetic field distribution. Through comparison of the critical currents and AC losses of four types of HTS cables, we determine the best structural choice among these cables. |
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| Keywords: | Cable geometry Superconducting tape layout Critical current AC loss |
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