Study on transient stability of superconducting cables

超导电缆暂态稳定性研究

• 批准号: 06452206
• 负责人: ISHIYAMA Atsushi
• 金额: $ 4.86万
• 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: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06452206/
• 关键词: superconductivity; AC Application; multi-strand cables; transient stability; normal-zone propagation property; distibuted cricuit; current redistribution; cross contact electrical resistance; 超電導; 常電導伝播特性

19941. Numerical cord for simulation of transient stability of multi-strand superconducting cables : We developed some computer codes to simulate transient behaviors of multi-strant cables such as current distribution among srands and temperature distribution in cables. We also developed a method for estimation of the current distribution among strands by using a pick-up coil system.2. Sensitive method for measurement of electrical cross contact resistance between strands : We proposed a new method adopting superconducting transformer. By this method, we could measure small cross contact resistance of about 10^<-8> OMEGA.19951. Simulation of transition to normal state in multi-strand superconducting cables : We carried out a lot of experiments to evaluate the validity of the developod computer codes and to investigate the transient behavior of multi-strand cables in quench process. From these numerical simulations and experimental results, the influences of the material properties of superconduciting strand and the thermal effect of coolant on the transient stability became evident.2. Measurement of cross contact resistance of Rutherford type cables : We adopted the proposed method to measure the cross contact resistance of Rutherford cables for SSC project.19961. Simulation of transition to normal state in multi-strand superconducting cables : We newly developed a computer code by 3D finite element analysis to investigate the temperature evolution in cross-section of a strand and to clarify the effect of copper 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. Measurement of cross contact resistance of Rutherford type cables : We investigated the influences of curing temperature and pressure on the cross contact resistance of Ratherford cables.

19941。多股超导电缆暂态稳定性的数值模拟：我们开发了一些计算机程序来模拟多股超导电缆的暂态行为，如沙子间的电流分布和电缆内的温度分布。我们还开发了一种通过使用拾取线圈系统来估计股线间电流分布的方法。测量股间交叉接触电阻的灵敏方法：我们提出了一种采用超导变压器的新方法。用这种方法，我们可以测量出小的交叉接触电阻，约为10^-8；Omega；19951。多股超导电缆向正常状态转变的模拟：我们进行了大量的实验，以评估所开发的计算机程序的有效性，并研究多股超导电缆在失超过程中的暂态行为。从这些数值模拟和实验结果可以看出，超导股的材料性质和冷却剂的热效应对暂态稳定性的影响是显而易见的。卢瑟福电缆交叉接触电阻的测量：我们采用所提出的方法测量了SSC工程中卢瑟福电缆的交叉接触电阻。多股超导电缆向正常状态转变的模拟：我们用三维有限元方法开发了一个新的计算机程序，用于研究多股超导电缆横截面上的温度演化，并阐明铜基质对暂态稳定性的影响。根据本项目期间获得的这些结果，为交流用高稳定超导电缆的设计和开发提供了指导方针。卢瑟福电缆交叉接触电阻的测量：研究了固化温度和压力对拉瑟福电缆交叉接触电阻的影响。

项目成果

小貫 天: "三次元有限要素法によるリニア誘導機二次導体スリットの解析" 電気学会論文誌D. 114. 1122-1129 (1994)

大贯十：“利用三维有限元法分析直线感应电机中的次级导体狭缝” 日本电气工程师学会会刊 D. 114. 1122-1129 (1994)

小貫 天: "分割磁極型永久磁石を有するリニア同期モータの二次構成に関する検討" 電気学会論文誌. 116D. 88-93 (1996)

十大贯：“具有分裂磁极永磁体的线性同步电机的二次配置的研究”日本电气工程师协会学报116D 88-93（1996）。

A.Ishiyama: "Optimal Design Method for MRI Superconducting Magnets with Ferromagnetic Shield" IEEE Transactions on Applied Superconductivity. 3. (1997)

A.Ishiyama：“具有铁磁屏蔽的 MRI 超导磁体的优化设计方法”IEEE 应用超导汇刊。

T.Onuki, S.Wakao, T.Hattori: "Hybrid finite and boundary element method applied to nonlinear magnetic field analysis" IEEE Transactions on Magnetics. Vol.30. 2908-2911 (1994)

T.Onuki、S.Wakao、T.Hattori：“应用于非线性磁场分析的混合有限元和边界元方法”IEEE Transactions on Magnetics。

M.Tsuda, N.Toyoda, M.Matsui, A.Ishiyama: "Stability of non-insulated A.C.multi-strand superconducting cables" IEEE Transactions on Magnetics. Vol.32. 2854-2857 (1996)

M.Tsuda、N.Toyoda、M.Matsui、A.Ishiyama：“非绝缘交流多股超导电缆的稳定性”IEEE 磁学汇刊。