AC Loss of a Multi-Layer per Phase Tri-Axial HTS Cable with Balanced Current Distribution
AC Loss of a Multi-Layer per Phase Tri-Axial HTS Cable with Balanced Current Distribution
复制标题
具有平衡电流分布的多层每相三轴高温超导电缆的交流损耗
DOI：
10.1007/s10948-010-0863-0
复制
发表时间：
2011
影响因子：
1.8
通讯作者：
T.Hamajima
中科院分区：
文献类型：
--
作者：
A.N.Ozcivan;M.Toda;N.Hu;K.Hoshino;T.Yagai;M.Tsuda;T.Hamajima
近年来，高温超导电缆因其紧凑性和高容量而受到广泛研究。在高温超导电缆中，交流损耗是一个重要的问题，大的交流损耗会降低电力线的效率，其中三轴电缆由于其超导带数量少、漏磁场小、漏热损失小而受到广泛关注。为了实现高载流能力，每一相都需要一层以上的超导层，因此需要仔细研究多层三轴高温超导电缆的交流损耗。在三轴电缆中，不同相电流在其他相层上产生异相磁场。在多层布置的情况下，层表面上的净磁场可能超过HTS带的穿透场。因此，在本文中，我们分析了三轴高温超导电缆的交流损耗，这是由每相两层。在这里，我们处理的三轴电缆，其中包括两个不同的纵向段，从而满足平衡的相位和均匀的电流分布条件，通过控制单独的段的扭曲间距和长度。
Recently, high-temperature superconductor (HTS) cables have been widely studied because of their compactness and high power capacity compared to conventional copper cables. In HTS cables, AC loss is an important issue since large losses reduce the efficiency of the power line.Among HTS cables, tri-axial cable is under intensive investigation recently, since it has a smaller amount of HTS tapes, small leakage fields and small heat loss in leak when compared with the three single-phase cables. For realizing high current capacity, more than one layer is required for each phase; therefore AC loss of the multi-layer tri-axial HTS cable should be carefully examined.In the tri-axial cable, different phase currents produce the out-of-phase magnetic fields on the other phase layers. In case of multi-layer arrangement, net magnetic fields on layer surfaces may exceed the penetration field of the HTS tape. Therefore in this paper, we analyze the AC loss of a tri-axial HTS cable which is composed of two layers per phase. Here, we treat the tri-axial cable which consists of two different longitudinal segments and thus satisfies balanced phase and homogeneous current distribution condition by controlling twist pitch and length of separate segments.