Development of mechanical PCS for SMES

中小企业机械PCS开发

• 批准号: 12555078
• 负责人: SUEHIRO Junya
• 金额: $ 8.58万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12555078/
• 关键词: Mechanical PCS; Quench; SMES; Subcooled liquid nitrogen; Quench time lag; Metallic particle; 限流器; 高温超伝導体

(1) Quench of the mechanical PCS, which was energized by the lamp current, generated with a time delay after the instantaneous PCS current exceeded a static quenching current (the quench delay).(2) The quench delay was attributed to the time in which the temperature of the superconducting connection bridge became higher than the critical temperature due to the magnetic flux flow loss.(3) An optical observation system was developed in order to observe bubble behavior in the subcooled liquid nitrogen. It became clear the bubble collapsed within 1ms, which was much shorter than in pool boiling liquid nitrogen.(4) Bubble formation process in the presence of free conducting particle in liquid helium was investigated. Experimental results showed that a single bubble was always generated at the moment of particle collision with the electrode and bubble behavior depended strongly on the state of liquid helium.

(1)机械式PCS在灯电流激励下猝灭，瞬时PCS电流超过静态猝灭电流后产生延时（猝灭延时）。(2)淬火延迟是由于磁通量损失导致超导连接桥的温度高于临界温度的时间。(3)研制了一种光学观测系统，用于观测过冷液氮中的气泡行为。结果表明，气泡在1ms内破裂，比池内沸腾液氮的时间短得多。(4)研究了液氦中自由导电粒子存在时的气泡形成过程。实验结果表明，在粒子与电极碰撞的瞬间，总是产生单个气泡，气泡的行为与液氦的状态密切相关。

项目成果

J. Suehiro and M. Hara: "Quench time lag of mechanical PCS with ramped current waveforms"Cryogenics. Vol.43(in press). (2003)

J. Suehiro 和 M. Hara：“具有斜坡电流波形的机械 PCS 的淬火时间滞后”Cryogenics。

J.Suehiro, M.Hara: "Quench time lag of mechanical PCS with ramped current waveforms"Cryogenics. Vol.43(印刷中). (2003)

J.Suehiro、M.Hara：“具有斜坡电流波形的机械 PCS 的淬火时间滞后”Cryogenics 第 43 卷（印刷中）。

M.Hara, H.Nakagawa, T.Shinohara, J.Suehiro: "Generation, growth and collapse of bubbles on collision of particle with electrode in dc electrically stressed liquid helium"IEEE Trans. on Dielectrics and Electrical Insulation. Vol.9. 910-921 (2002)

M.Hara、H.Nakakawa、T.Shinohara、J.Suehiro：“直流电应力液氦中粒子与电极碰撞时气泡的生成、生长和破裂”IEEE Trans。

J.Suehiro, Y.Matsumoto, K.Imasaka, M.Hara: "Partial discharge induced bubbles generated in subcooled liquid nitrogen atmospheric pressure"Proc. of 13th International Symposium on High Voltage Engineering. (発表予定). (2003)

J.Suehiro、Y.Matsumoto、K.Imasaka、M.Hara：“过冷液氮大气压下产生的局部放电气泡”第 13 届国际高压工程研讨会论文集（即将发表）。

J.Suehiro, Y.Matsumoto, K.Imasaka, M.Hara: "Partial discharge induced bubbles generated in subcooled liquid nitrogen at atmospheric pressure"Proc. of 13th International Symposium on High Voltage Engineering. (発表予定). (2003)

J.Suehiro、Y.Matsumoto、K.Imasaka、M.Hara：“大气压下过冷液氮中产生的局部放电引起的气泡”第 13 届国际高压工程研讨会论文集（即将发表）。