Abstract: In order to satisfy the magnet system’s requirements of large-current, high-magnetic field and good mechanical characteristics in the future fusion device, a 6-channel TSTC-CICC HTS conductor is proposed in this paper. Based on the self-consistent model and T-A formulation, the current carrying capacity and AC loss characteristics of the HTS 6-channel conductors for three structures were numerically studied by 2-dimensional finite element method，the stacking direction of the tapes in structure 1 is perpendicular to the radial direction, the stacking direction of the tapes in structure 2 is parallel to the radial direction, and the stacking modes of the tapes in structure 3 are perpendicular to the radial direction and parallel to the radial direction. From the calculated results, it can be seen that the critical current of the conductor-1 is the maximum. The current of the conductor-2 is the minimum and the current of the conductor-3 is the medium. In the low field, the isotropy characteristics of the critical current of conductor-1 and conductor-3 are better than that of the conductor-2. The variations of the critical current of the three conductors with the angle and intensity of the external magnetic field are different. The transport AC loss of the conductor-1 is the minimum and that of the conductor-2 is the maximum. The transport AC loss of the conductor-3 is the medium. The AC loss characteristics of the three conductors are different in different angles of external magnetic field.

Key words: Self-consistent model, T-A formulation, 6-channel TSTC-CICC, HTS conductor, Current carrying capacity, AC loss, Numerical study

摘要： 为了满足未来聚变装置磁体系统大电流、强磁场以及优良机械特性的要求，提出一种六通道TSTC-CICC高温超导导体，并采用自洽模型和T-A法，对三种结构的六通道高温超导导体的载流性能和交流损耗特性进行了二维有限元仿真研究，其中结构1中带材堆叠方向垂直于径向方向，结构2中带材堆叠方向平行于径向方向，结构3中带材堆叠方式既有垂直于径向又有平行于径向两种方式。由研究结果可知，结构1导体的临界电流最大，结构2导体的最小，结构3导体的介于两者之间。结构1和结构3导体在低磁场下具有较好的临界电流各向同性特性。三种结构导体的临界电流随外磁场角度及磁场强度的变化各不相同。结构1导体的传输交流(AC)损耗最小，结构2导体的传输AC损耗最大，结构3导体的AC传输损耗介于两者之间。在不同角度的外磁场中，三种结构的导体表现出的AC损耗各不相同。

关键词: 自洽模型, T-A法, 六通道TSTC-CICC, 高温超导导体, 载流性能, 交流损耗, 仿真研究