AC Loss Analysis of HTS Power Cable With RABiTS Coated Conductor

Numerical analysis of AC loss for a HTS power cable is investigated using commercial FEM software package. AC loss of the HTS power cable, which is made by 2 G conductor, is hard to experimentally measure due to very small signal compared to that made by 1G conductor. The FEM model describes current distribution and AC loss inside the HTS conductor for the AC transport current through nonlinear E-J correlation. For the verification of the AC loss analysis model, the results were compared with the well known analytic solution of a single strip HTS conductor and experiments. Unlike IBAD substrate, magnetization of the RABiTS has influence on the precise estimation of the AC loss and it is also considered in the FEM model. Moreover, several conductors should be stacked to meet the large transport current because of the small critical current at present and the effect of stacking configuration is also investigated. In this paper, AC loss analysis results are presented for various HTS power cable configurations such as stacking directions. The results are compared with the experimental results of a model HTS power cable and the best configuration to minimize AC loss is suggested.