Ac loss reduction of multilayer superconducting power transmission cables by using narrow coated conductors
Ac loss reduction of multilayer superconducting power transmission cables by using narrow coated conductors
复制标题
使用窄涂层导体降低多层超导电力传输电缆的交流损耗
DOI：
10.1088/0953-2048/24/6/065013
复制
发表时间：
2011
影响因子：
3.6
通讯作者：
T. Okuma
中科院分区：
文献类型：
--
作者：
N. Amemiya;Quan Li;Kaoru Ito;K. Takeuchi;Taketsune Nakamura;T. Okuma
涂层导体的交流损耗特性由垂直于其超导层的磁场分量决定。设计了由4 mm宽涂层导体（4 mm电缆）和2 mm宽涂层导体（2 mm电缆）组成的多层电缆和单层电缆，并对其横截面进行了电磁场数值分析，计算了其交流损耗。梯形横向临界电流密度Jc分布的肩膀，以及均匀的假设在涂层导体的分析。前者模拟了涂层导体边缘附近的退化Jc。在单层的情况下，2 mm电缆的计算交流损耗与4 mm电缆的计算交流损耗相当。在多层情况下，计算的交流损耗的2毫米电缆明显小于那些的4毫米电缆。涂层导体的边缘附近的退化Jc更严重地影响的交流损耗特性的2毫米电缆比那些的4毫米电缆。然而，即使我们考虑涂层导体的边缘附近的劣化Jc的影响，从减少交流损耗的观点来看，在多层电缆中，2 mm宽的涂层导体比4 mm宽的涂层导体更有利。
The ac loss characteristics of coated conductors are dominated by the magnetic field component normal to their superconductor layer. Multilayer cables as well as monolayer cables consisting of 4 mm-wide coated conductors (named 4 mm cables) and those consisting of 2 mm-wide coated conductors (named 2 mm cables) were designed, and numerical electromagnetic field analyses were performed in their cross sections to calculate their ac losses. Trapezoidal lateral critical current density Jc distributions with shoulders as well as uniform ones were assumed in coated conductors for the analyses. The former models the degraded Jc near the edges of coated conductors. In the case of the monolayer, the calculated ac losses of the 2 mm cables were comparable to those of the 4 mm cables. In the cases of the multilayers, the calculated ac losses of the 2 mm cables were obviously less than those of the 4 mm cables. The degraded Jc near the edges of coated conductors more seriously affects the ac loss characteristics of the 2 mm cables than those of the 4 mm cables. However, even if we consider the influence of the degraded Jc near the edges of coated conductors, 2 mm-wide coated conductors are more profitable than 4 mm-wide coated conductors in multilayer cables from the viewpoint of ac loss reduction.
IBAD/MOCVD 工艺制备 YBCO 涂层导体的横向 Jc 分布
DOI：
--
发表时间：
2006
期刊：
Physica C 445-448
影响因子：
--
作者：
N.Amemiya
通讯作者：
N.Amemiya
影响因子：
1.8
作者：
N. Enomoto;T. Izumi;N. Amemiya
通讯作者：
N. Enomoto;T. Izumi;N. Amemiya