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Recent status and progress on HTS strand with quasi-isotropic critical current

The coated conductors (CCs), so called the second-generation high-temperature superconducting (2G HTS) tape, has attractive potential application in transmission at low magnetic field/liquid nitrogen temperature and high-field application at low temperatures due to their excellent critical current density and mechanical performance. Its critical current density has strong anisotropy in particularly at 77 K Because the single tape has limited capacity of carrying current, the cable or strand making of multi-tapes stacked in parallel is necessary. Within recent years, several cables, such as Roebel cable, CORC cable, TSTC cable, TS cable, HTS-CroCo cable, were proposed. This paper presents status and progress on a kind of HTS strand made from REBCO tapes. Its quasi-isotropic critical current is experimentally confirmed at liquid nitrogen temperature, mechanical characteristic, AC losses, thermal stability, quench characterization are also researched. Finally, the feasible process for the production of practical length of such strand is described by processing 10 m long sample, which is promising for applications of high fields or power transmission.