Numerical Analysis on AC Losses of Rutherford Cable Made From HTS Quasi-Isotropic Strands

In this paper, the ac losses mainly about hysteresis loss in the preliminary design of Rutherford cable (Rfc) made from high-temperature superconducting (HTS) Quasi-isotropic Strands (Q-ISs) are evaluated by numerical simulations. A 2-D structure for Rfc including 10 Q-ISs is proposed. Then, transport ac loss in the cable made from Q-ISs under different frequencies and amplitudes of transport currents, and the magnetization loss under external ac magnetic fields of different magnitudes with different orientations are separately calculated using T-A formulation at 77 K. Additionally, the simulated results of the Rfc are compared with those of a directly stacked conductor (DSC). The results show that the transport ac loss of the Rfc made from Q-ISs is smaller than that composed of DSCs. The magnetization loss of Rfc made from Q-ISs is also smaller than that of DSCs in some certain range of external field orientation. The proposed Rfc is a potential and promising solution for superconducting cables for ac applications of feeder line and bus with high current capacity.