Cable-in-conduit conductors comprised of twisted stacks of high-temperature superconducting (HTS) tapes constitute a very promising technology by virtue of their easy manufacturing process, flexibility capabilities, and high current densities. In a cable, the current distribution among tapes is one of the key parameters affecting the cable performances. The distribution of current is affected mainly by the self-field configuration (ultimately related to the cable layout) and the termination resistances. In this paper we present a 2D finite element (FE) model, based on the T-A formulation, which computes the magnetic field and current distribution in stacked tapes. This model has been used to describe the experimental V–I results obtained in cables in which different current distributions among tapes are expected. The first case refers to V–I curves of stacks of HTS tapes inserted into ducts formed in the extruded aluminium cylindrical core for a straight cable. The excellent agreement between the experimental findings and the simulation results can be explained in terms of uniform current distribution within the tapes stack, up to the superconducting to normal transition. The second sample, an Al-slotted core Cable-In-Conduit-Conductor, has been bent down to a radius of 0.15 m, and from the measured V–I characteristic of each individual tape, a different tape degradation depending on the tape position within the stack was recorded. The model is able to reconstruct the V–I of the stacks from the characteristic curves of the individual tapes with a satisfactory agreement. The finite element analysis reveals non-uniform current distribution among the tapes, which could expose the cable to a potentially irreversible damage during operation. The proposed FE model constitutes a useful tool for the analysis and predictions of HTS CIC conductor performances and represents a suitable basis for the implementation of more complex models aimed at the design of specific and large applications of this conductor in the next future.

由高温超导（HTS）胶带的绞合叠层组成的导管电缆导体因其易于制造的过程，柔性能力和高电流密度而成为一项很有前途的技术。在电缆中，胶带间的电流分布是影响电缆性能的关键参数之一。电流的分布主要受自电场配置（最终与电缆布局有关）和端接电阻的影响。在本文中，我们基于TA公式提出了一个二维有限元（FE）模型，该模型可计算堆叠带中的磁场和电流分布。该模型已用于描述实验V–I预期在胶带间电流分布不同的电缆中获得的结果。第一种情况是指将HTS胶带堆栈的V–I曲线插入到用于直线电缆的挤压铝圆柱芯中形成的导管中。实验结果与模拟结果之间的极佳一致性可以用胶带叠层内直至超导到正常转变的均匀电流分布来解释。第二个样本是铝槽芯电缆导管导体，已弯曲到0.15 m的半径，并且根据测得的每条胶带的V–I特性，不同的胶带劣化取决于胶带位置记录堆栈中的内容。该模型能够重建V–I从各条胶带的特性曲线得出的叠层数，结果令人满意。有限元分析表明，胶带之间的电流分布不均匀，这可能会使电缆在操作过程中遭受潜在的不可逆损坏。所提出的有限元模型是分析和预测高温超导CIC导体性能的有用工具，并为实施更复杂的模型提供了合适的基础，这些模型旨在在未来的将来设计该导体的特定和大型应用。