Numerical Analysis on the Current Distribution and the Loss in HTS Stacked Tapes Considering Termination Resistances

The high temperature superconducting (HTS) cables have wide application in superconducting magnets due to their high current-carrying capacity and thermal stability at high fields. But the current-carrying performance of the HTS cables is strongly affected by the current distribution among different tapes, which is usually determined by the resistance of the copper terminal. To investigate the mechanics of current distribution in the 15-strand stacked HTS tapes and further improve its performance, a simulation method considering both the splice resistance and the screening current effect has been set up by using the coupling of T-A formulation together with a circuit model. The numerical model could also be used to predict the critical performance of the cable and the losses in various conditions. The numerical model and the detailed result analysis are represented in this paper.