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首页> 外文期刊>Physica, C. Superconductivity and its applications >Over-current characteristics of superconducting model cable using YBCO coated conductors
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Over-current characteristics of superconducting model cable using YBCO coated conductors

机译：使用YBCO涂层导体的超导模型电缆的过电流特性

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摘要

For the application to power transmission cables, a number of YBCO tapes would be assembled and wound in spiral on a Cu-former. YBCO tapes and the Cu-former are connected in parallel and they might be subjected to short-circuit fault currents 10-30 times the operating current. In this study, we constructed a 1 m long YBCO model cable. Over-current with a peak of 31.5 kArms and a duration of 2.0 s, which was established by JEC (Japanese Electrotechnical Committee), was applied to this cable in a liquid nitrogen bath. The redistribution of the transport current between YBCO tapes and the Cu-former were examined by using Hall sensors. The numerical simulations were carried out using a newly developed computer program based on the 3D finite element method (FEM) in order to clarify the over-current characteristics in the cable. From the comparison of the experimental and simulation results, the validity of the developed computer program was confirmed. Therefore, we performed the simulations of a 10 m long model cable when carrying a fault current of 31.5 kArms applied for a durations of 2.0 s, and also estimated the influence of the cross-section area of the Cu-former and the Cu shield layer on the thermal behavior of the model cable by using the developed computer program.
机译：为了应用于电力传输电缆，将组装许多YBCO胶带，并在Cu-former上螺旋缠绕。 YBCO胶带和Cu-former并联连接，它们可能会承受10-30倍工作电流的短路故障电流。在这项研究中，我们构造了一条1 m长的YBCO模型电缆。由JEC（日本电工技术委员会）确定的峰值电流为31.5 kArms，持续时间为2.0 s的过电流在液氮浴中施加到该电缆上。通过使用霍尔传感器检查了YBCO胶带和Cu-former之间的传输电流的重新分布。为了阐明电缆中的过电流特性，使用了新开发的基于3D有限元方法（FEM）的计算机程序进行了数值模拟。通过实验和仿真结果的比较，证实了所开发计算机程序的有效性。因此，我们在负载31.5 kArms的故障电流并施加2.0 s的持续时间时，对10 m长模型电缆进行了仿真，并估算了Cu形成层和Cu屏蔽层的横截面积的影响通过使用开发的计算机程序，可以了解模型电缆的热性能。

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