AC Transport Loss of Coated Conductors in Anti-Parallel Arrangement
AC Transport Loss of Coated Conductors in Anti-Parallel Arrangement
复制标题
反并联布置中涂层导体的交流传输损耗
DOI：
10.1109/tasc.2010.2093864
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发表时间：
2011
影响因子：
1.8
通讯作者：
M. Vojenčiak
中科院分区：
文献类型：
--
作者：
F. Gomory;J. Šouc;M. Vojenčiak
采用实验和数值模拟的方法研究了两种负载相反电流的叠层导体（CC）的交流损耗。这种布置在故障限流器（FCL）的设计中是一种很有前途的选择，因为传输电流损失可以显著低于单个磁带的自场配置。正常状态电阻的要求表明，在为FCL应用开发的特定CC带中，金属稳定层应小于~10 μm。考虑到最新绝缘材料的电强度，这导致超导层之间的距离约为100 μm。我们的研究表明，损失对这个数量的依赖是多么敏感。即使是在铁磁衬底上制备的涂层导体，也可以通过将带与超导层以最小距离相互靠近而大大减少衬底损耗。影响交流损耗的另一个因素是临界电流密度在带宽上的变化。然后对计算和测量的损耗数据进行比较，以非破坏性的方式评估磁带质量。
AC loss in two stacked coated conductors (CC) carrying opposite currents was investigated by experiments and numerical simulations. This arrangement is a promising option in the design of fault current limiter (FCL) because the transport current loss could be significantly lower than in the self-field configuration of one single tape. The requirements of normal-state resistance indicate that in the particular CC tape developed for FCL application the metallic stabilizing layer should be less than ~10 μm. Considering the electric strength of up-to-date insulations this leads to ~100 μm distance between superconducting layers. Our study shows how sensitively depends the loss on this quantity. Even in the case of coated conductors prepared on ferromagnetic substrate a substantial reduction of the substrate loss can be achieved by putting the tapes in close proximity with superconducting layers facing each other from minimum distance. Another factor influencing the AC loss is the variation of critical current density across the tape width. Then the comparison of calculated and measured loss data allows to assess the tape quality in a non-destructive way.