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Numerical Analysis of Electromagnetic Properties of Next-Generation Conductor using YBCO Superconducting Film

使用YBCO超导薄膜的下一代导体电磁特性的数值分析

基本信息

批准号：
15360146
负责人：
OHSAKI Hiroyuki
金额：
$ 7.81万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

项目摘要

This study was concerned with YBCO coated conductor expected as next-generation superconducting wire and aimed at developing numerical analysis tools to investigate electromagnetic properties of the superconductor, such as AC losses, in detail. The following results were obtained.1.Development of numerical analysis toolsStatus of research and development of superconducting wire and fault current limiters using YBCO film was surveyed through participation in international and domestic conferences and literature search, and latest information and data that can be used for modeling of YBCO superconductor were collected and organized. Based on them, numerical analysis tools were developed for studying complicated electromagnetic phenomena in superconductor using high-performance computers. In particular, improvement of computation efficiency of the analysis tools including E-J characteristics, S-N transition, coupled problems of electromagnetic and thermal fields with electric circuits, etc. was performed.2.Measurement of fundamental electromagnetic properties of YBCO filmBasic electromagnetic properties of a small piece of YBCO superconducting film were measured for comparison with numerical analysis results.3.Numerical analysis of electromagnetic properties of YBCO superconductorSuperconducting current distribution and AC losses in YBCO superconducting wire were analyzed with the emphasis on their dependence on n-value, external magnetic field, superconducting film width, etc. Electromagnetic characteristics of YBCO multi-conductor arrangement and fault current limiting elements were also studied. Fundamental characteristics of AC losses, the difference in AC loss characteristics between the arrangements of planar parallel and layer stack were studied by numerical analysis. From these results the relation between multi-conductor arrangements of YBCO superconducting wires and AC loss characteristics was explained.

本研究针对有望成为下一代超导导线的YBCO涂层导体，旨在开发数值分析工具来详细研究超导导体的电磁特性，如交流损耗。得到了以下结果：通过参加国内外会议和文献检索，调查了利用YBCO薄膜的超导导线和故障限流器的研究和发展现状，收集和整理了可用于YBCO超导体建模的最新信息和数据。在此基础上，开发了利用高性能计算机研究超导体中复杂电磁现象的数值分析工具。特别是提高了E-J特性、S-N跃迁、电磁场和热场与电路耦合问题等分析工具的计算效率。测量了一小片YBCO超导膜的基本电磁特性，并与数值分析结果进行了比较。分析了YBCO超导导线中超导电流分布和交流损耗与n值、外加磁场、超导膜宽度等因素的关系。研究了YBCO多导体布置和故障限流元件的电磁特性。通过数值分析，研究了交流损耗的基本特性，以及平面平行布置和层叠布置之间交流损耗特性的差异。由此解释了YBCO超导导线的多导体排列与交流损耗特性之间的关系。