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Comparison study of cable geometries and superconducting tape layouts for high-temperature superconductor cables

机译：电缆几何形状与超导胶带布局对高温超导电缆的比较研究

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摘要

High-temperature superconductor (HTS) rare-earth-barium-copper-oxide (RESCO) 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.
机译：高温超导体（HTS）稀土 - 钡 - 氧化铜（Resco）胶带非常有前途用于高电流电缆。电缆几何和超导磁带的布局与HTS电缆的性能直接相关。在本文中，我们使用数值方法来执行多级扭曲堆叠磁带电缆（TSTC）导体的比较研究，以找到更好的电缆结构，可以提高临界电流并最小化电缆的交流（AC）损耗。子电缆几何设计设计成具有楼梯形状。选择三个超导带布局，并评估其运输性能和交流损耗。获得电缆的磁场和电流密度轮廓。结果表明，基于其下降顺序的临界电流值的基于其临界电流值，从内部排列超导带的布置可以增强电缆的传输能力，同时显着降低交流损耗。这些结果暗示通过以与电磁场分布一致的方式布置超导磁带来实现电缆传输能力的改进。通过比较四种HTS电缆的关键电流和交流损耗，我们确定这些电缆中的最佳结构选择。

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