Study on Stability of Superconducting Cables for AC Application

交流超导电缆的稳定性研究

• 批准号: 09450116
• 负责人: ISHIYAMA Atsushi
• 金额: $ 5.63万
• 依托单位: Waseda University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09450116/
• 关键词: superconductivity; AC Application; multi-strand cables; high Tc superconductor; transient stability; linear induction motors; current limiter; finite element analysis; 撚線ケーブル導体; 常伝導伝播特性; 超伝導リニア誘導器; 超電導; 常電導伝播特性; 超電導限流器; 超電導リニア誘導機

1. Transient stability of multi-strand superconducting cablesWe developed a computer code based on 3D funite element method and a distributed circuit to simulate transient behaviors of three- strand superconducting cables such as temperature evolution in strand and cables, and current distribution among strands in quench process. Especially, we focused on the effect of cupper matrix on the transient stability. From these results obtained for the term of this project, the guideline for the design and development of highly stabilized superconducting cables for AC use.2. Development of superconducting cylindrical linear induction motorWe have designed and constructed a model cylindrical linear induction motor (SCLIM) with superconduting primary windings to clarify the behaviors (AC loss, stability and so on) of AC superconducting windings in a realistic operational environment of electrical rotating machines. The fundamental operational properties such as thrust characteristic and the ele … More ctro-magnetic and mechanical phenomena in the superconducting windings were investigated. And we optimized the current distribution in primary windings to enhance the thrust characteristic and proposed a newly quench protection circuit for a realistic operation of superconducting electrical machines.3. Stability Criterion for Cryocooler-cooled HTS CoilsMagnet technology of high-temperature superconductor (HTS) with conduction cooling system by GM cryocooler have been advanced. We have measured the quench characteristics of HTS tapes (Bi-2223/Ag, Bi2212/Ag tapes) with conduction cooling system by GM cryocooler and developed a computer program based on the finite element to investigate the thermal and electromagnetic behaviors within HTS tapes. Using the simulation code, we discussed a stability criterion for cryocooler-cooled HTS coils. The current at which "thermal runaway" occurs, depends on the relationship between the cooling power of GM cryocooler and heat generation within HTS coils, is chosen as a stability criterion. We also investigate the transient thermal and electromagnetic behaviors in HTS coils during a quench process to determine the thermal and current margin in a realistic operation. Less

1.多股超导电缆的瞬态稳定性我们开发了基于3D函数元方法和分布式电路的计算机代码来模拟三股超导电缆的瞬态行为，例如股和电缆中的温度演变以及失超时股之间的电流分布特别是，我们重点关注了铜基体对瞬态稳定性的影响，为高稳定超导的设计和开发提供了指导。 2. 超导圆柱直线感应电机的开发我们设计并构建了一个具有超导初级绕组的圆柱直线感应电机模型（SCLIM），以阐明交流超导绕组在超导绕组中的特性（交流损耗、稳定性等）。研究了旋转电机的实际运行环境，例如推力特性以及超导绕组中的电磁和机械现象。我们优化了初级绕组的电流分布，以增强推力特性，并提出了一种新的失超保护电路，用于超导电机的实际运行。 3．低温冷却器冷却的高温超导线圈磁体技术的高温超导（HTS）技术。 GM冷冻机的传导冷却系统已经先进，我们已经测量了HTS带（Bi-2223/Ag， Bi2212/Ag 磁带）与 GM 制冷机的传导冷却系统，并开发了基于有限元的计算机程序来研究 HTS 磁带内的热和电磁行为，使用模拟代码，我们讨论了制冷机冷却的 HTS 线圈的稳定性标准。 “热失控”发生的电流取决于 GM 制冷机的冷却功率与高温超导线圈内的热量之间的关系，我们还选择了该电流作为稳定性标准。失超过程中高温超导线圈的瞬态热和电磁行为，以确定实际操作中的热和电流裕度。

项目成果

A.Ishiyama et al.: "Design and Construction of a Superconducting Cylindrical Linear Induction Motor With AC Superconducting Primary Windings"IEEE Transactions on Applied Superconductivity. Vol.9. 1217-1220 (1999)

A.Ishiyama 等人：“具有交流超导初级绕组的超导圆柱形线性感应电机的设计和构造”IEEE 应用超导汇刊。

T. Onuki et al.: "A Novel Switchng Method for Shortening Block Seeding Caution in Short-secondary Member Linear Motors"Trans. IEE of Japan. Vol.117-D. 1103-1109 (1998)

T. Onuki 等人：“一种缩短短次级构件直线电机中块播种注意事项的新颖切换方法”Trans。

A.Ishiyama et al.: "An Optimal Design Method for High-Field Superconducting Magnets with Ferromagnetic Shields"IEEE Transactions on Applied Superconductivity. Vol.7. 439-442 (1997)

A.Ishiyama 等人：“带有铁磁屏蔽的高场超导磁体的优化设计方法”IEEE 应用超导汇刊。

J.Nakatsugawa, A.Ishiyama et al.: "Magnetic Characteristics of a High-Te Superconducting Cylinder for Magnetic Shielding Type Superconducting Fault Current Limiter"IEEE Transactions on Applied Superconductivity. 9・2. 1373-1376 (1999)

J. Nakatsukawa、A. Ishiyama 等人：“磁屏蔽型超导故障限流器的高 Te 超导圆柱体的磁特性”IEEE 应用超导学报 9・2（1999 年）。

T.Onuki et al.: "Characteristics analysis of linear induction motor with two types of secondary structures based on electromagnetic field and electric circuit analysis"IEEE Transactions on Magnetics. 35・5. 4022-4024 (1999)

T. Onuki 等人：“基于电磁场和电路分析的两种次级结构的线性感应电机的特性分析”IEEE Transactions on Magnetics 35・5 (1999)。