AC Loss Characteristics of a Cylindrical High Temperature Superconductor
AC Loss Characteristics of a Cylindrical High Temperature Superconductor
复制标题
圆柱形高温超导体的交流损耗特性
DOI：
10.1109/tasc.2007.898326
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发表时间：
2007
影响因子：
1.8
通讯作者：
G. Cha
中科院分区：
文献类型：
--
作者：
Y.H. Ma;Z.Y. Li;K. Ryu;S. Choi;K. Park;I. Oh;H.J. Song;G. Cha
圆柱形高温超导体（HTS）常用于电力传输电缆和矩阵故障限流器等电力应用中。在这些设备的商业化中，交流损耗是一个关键因素，但由于其测量的复杂性而没有完全阐明，例如，在单个HTS磁带中流动的电流分布不均匀和相位差。我们制备了两个圆柱形导体，由不同临界电流密度的Bi-2223带和一个由Bi-2212块材制成的空心导体组成。本文对导体的交流损耗特性进行了实验研究和数值分析。结果表明，所有导体的测量损耗都不依赖于电压引线的排列和接触位置。这意味着大部分损耗磁通只存在于导体中。高临界电流密度Bi-2223导体的损耗与基于多边形模型的数值计算结果吻合较好，而低临界电流密度Bi-2223导体的损耗与基于单块模型的计算结果吻合较好。
A cylindrical high temperature superconductor (HTS) is often used in power applications such as power transmission cables and matrix fault current limiters. In commercialization of these apparatuses, AC loss is a critical factor but not elucidated completely because of complexities in its measurement, e.g. non-uniform current distribution and phase difference between currents flowing in an individual HTS tape. We have prepared two cylindrical conductors composed of a Bi-2223 tape with different critical current density and one hollow conductor made of Bi-2212 bulk material. In this paper, the AC loss characteristics of the conductors have been experimentally investigated and numerically analysed. The results show that the measured losses for all the conductors are not dependent on both arrangements and contact positions of a voltage lead. This implies that most of loss flux is only in the conductors. The loss for the Bi-2223 conductor with high critical current density is in good agreement with the numerically calculated one based on the polygon model, whereas the loss measured for the Bi-2223 conductor with low critical current density coincides with the calculated loss from the monoblock model.