Study of Optimization Design of HTS Power Transmission Cable Based on AC Loss Minimization

提出了一种多层螺旋电缆交流损耗的电学测量方法。用该测量方法测量了由Bi2223高温超导带材制成的4层螺旋电缆的交流损耗。将测量数据与数值计算的交流损耗进行了比较，得到了较好的一致性。通过改变带间间隙宽度和带数，制作了几种由Y-123高温超导带材制成的短模型电缆。对这些短模型电缆的交流损耗进行了测量，并与数值结果进行了比较。数值模型可以很好地解释所测得的交流损耗随带间间隙宽度和带数的变化关系。在此基础上，系统地研究了Y-123高温超导带材多层电缆的交流损耗与电缆几何参数的关系。在这项研究中，获得了对交流降耗有用的知识。

In this study, an electric measurement method of AC losses in multi-layer spiral cables was developed. The measurement method was applied to measure the AC loss in the 4-layer spiral cable with 2-layer shield conductor made by Bi-2223 HTS tapes. The measured data were compared with the numerically calculated AC losses and the good agreement was confirmed. Several short model cables made by Y-123 HTS tapes were fabricated by changing tape-to-tape gap width and number of tapes. The AC losses in these short model cables were measured and compared with the numerical data. It is confirmed that the measured AC loss dependences on tape-to-tape gap width and tape numbers were clearly explained by the numerical model. Based on the numerical model, the relationship between the AC loss in the multilayer cable made by Y-123 HTS tapes and the cable geometrical parameters were systematically investigated. Among this study, the useful knowledge for the AC reduction was obtained.