Influence of Transport Mode on AC Loss Characteristics of a Bi-2223 Tape in a Multi-Tape Conductor
Influence of Transport Mode on AC Loss Characteristics of a Bi-2223 Tape in a Multi-Tape Conductor
复制标题
传输模式对多带导体中 Bi-2223 带的交流损耗特性的影响
DOI：
10.1109/tasc.2008.920554
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发表时间：
2008
影响因子：
1.8
通讯作者：
S.D. Hwang
中科院分区：
文献类型：
--
作者：
Y.H. Ma;Z.Y. Li;K. Ryu;S. Sohn;S.D. Hwang
高温超导体（HTS）是一种具有大容量电流的材料，主要用于电力传输电缆和故障限流器等电力应用。特别是，在这些电源应用中，交流损耗从经济角度来看是非常重要的，但由于其许多复杂性，这一问题尚未得到完全阐明。在这项工作中，制造了两个临界电流密度非常不同的高温超导导体，它们由放置在圆柱形前的几个Bi-2223带组成，试图清楚地了解它们的交流损耗特性。实验研究了这两种圆柱多带导体的交流损耗特性。此外，还研究了电流输运方式对导线中Bi-2223带交流损耗的影响。同时对Bi-2223胶带的直流电压电流特性进行了测量，并对测量的交流损耗进行了讨论。结果表明，对于临界电流密度较高的导体，与临界电流密度较低的导体一样，所测得的交流损耗与输运模式密切相关。然而，随着输运电流的增大，高临界电流密度导体的输运模式依赖性越来越弱。在同步模式下，低临界电流密度导体的交流损耗测量值与单块模型的计算值吻合较好。然而，高临界电流密度下导体的测量损耗与数值计算的损耗和单块模式计算的损耗并不一致。
The high-temperature superconductor (HTS) with large current capacity has been developed for power applications such as power transmission cables and fault current limiters. Especially, in these power applications, AC loss is very important in an economic point of view but this issue has not been completely elucidated due to its many complexities. In this work, two HTS conductors with very different critical current densities, which consist of several Bi-2223 tapes placed on a cylindrical former, were fabricated in an attempt to arrive at a clear understanding of their AC loss characteristics. AC loss characteristics for such two cylindrical multi-tape conductors have been experimentally investigated. Moreover, the influence of current transport mode on the AC loss of the Bi-2223 tape in the conductors was investigated. DC voltage-current characteristics of the Bi-2223 tapes were also measured for discussions on the measured AC losses. The results show that for the conductor with high critical current density, the measured AC loss strongly depends on the transport mode as in the conductor with low critical current density. However, the transport mode dependence of the conductor with high critical current density becomes weaker and weaker as transport current increases. In the simultaneous mode, the measured AC loss of the conductor with low critical current density is in good agreement with the calculated loss from the monoblock model. However, the measured loss of the conductor with high critical current density does not coincide with both the numerically calculated loss and loss calculated from the monoblock mode.