超导电缆终端电阻的建模与仿真
Modeling and simulation of termination resistances in superconducting cables
摘要：
我们解决的问题建模终端电阻，这在很大程度上是负责超导电缆中的电流分布不均。为此，我们提出了三个DC模型。在第一模型中，提出了考虑连续E-J关系的0 D电路式方法。第二个模型使用麦克斯韦方程的2D H-公式，对电场项有新的贡献，该项考虑了端接电阻引起的电压降。第三个模型，基于麦克斯韦方程组的3D H-公式，使用一种新的技术来模拟终端电阻和超导电缆在一个紧凑的框架内，计算使用两个非连接域的贡献。讨论了每种模型的优缺点。特定的应用程序，其中一个给定的模型是最好的拟合也被认为是。对于由4根高温超导带材组成的叠带电缆，模型的预测与实验结果吻合较好。总的来说，这项工作提出了一个调色板的三种不同的数值工具，用于计算电缆中的电流分布组成的多个磁带，终端电阻也考虑在内。一种模型的选择取决于特定的应用和所需的精度
英文摘要：
We address the problem of modeling termination resistances which are largely responsible for the uneven distribution of currents in superconducting cables. For such purpose we present three DC models. In a first model a 0D circuit-like approach considering a continuous E-J relationship is presented. A second model uses the 2D H-Formulation of Maxwell's equations, with a new contribution to the electric field term that takes into account the voltage drop due to termination resistances. A third model, based on the 3D H-Formulation of Maxwell's equations, uses a novel technique to simulate both the termination resistances and the superconducting cable within a compact framework that calculates both contributions using two non-connected domains. Advantages and disadvantages of each model are discussed. Particular applications for which a given model is best fitted are also considered. The models' predictions are in good agreement with experimental results for a stacked-tape cable composed of 4 HTS tapes. Overall, this work presents a palette of three different numerical tools for calculating the current distribution in cables composed of multiples tapes, where the termination resistance is also taken into account. The choice of one model over another depends on the particular application and on the degree of precision needed
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