Numerical Study on Fault Current Characteristics of Self-Shielded HTS DC Cables Made of REBCO Tapes in Parallel With Stainless Steel Tapes

For self-shielded HTS DC cable, fault current characteristics is an urgent research domain. Since the use of parallel conductors is a common method to protect HTS tapes, fault current characteristics of REBCO tape in parallel with several different metal materials are analyzed in this article. The REBCO tape in parallel with stainless steel tape is designed into self-shielded HTS DC cable for its ascendant current limiting ability. Then a 2D simulation model is established based on coupling electric, magnetic and thermal fields to simulate the current-temperature variations of cables. At last, the influence of thickness of the stainless steel variation on the surge withstand capability of cable is summarized. It is of important referential value for self-shielded HTS DC cable and other cables.