高温超导线圈在大电流下稳定性的数值仿真  

NUMERICAL STUDY ON STABILITY OF HTS COIL UNDER HIGH PULSE CURRENTS

作　　者：李渝[1] 李晓航[1] 宋乃浩[1] 肖立业[1] 

机构地区：[1]中国科学院电工研究所应用超导重点实验室,北京100080

出　　处：《低温物理学报》2004年第1期76-80,共5页Low Temperature Physical Letters

基　　金：国家自然科学基金 (项目编号 :5 0 1370 2 0 ;5 0 2 2 5 72 3);973计划 (项目编号 :19990 6 4 6 0 8)资助课题~~

摘　　要：在电力应用中 ,超导磁体可能会因为线圈工作于过流状态而失超 ,也可能会因为交流损耗而导致失超 .为此 ,我们模拟了一个磁体在大电流过载下的稳定性情况 .我们使用了一个建立在热传导方程和麦克斯韦方程基础上的差分数值计算方法来得出磁体内部的温度分布 .我们对各种不同的电流冲击情况进行了考察 ,我们的模型可以使磁体设计者在实际制作之前能够估计一个比较安全的操作电流水平 ,有着广泛的实用价值 .In high temperature superconducting (HTS) coil,the loss of stability may be result of the accumulation of heat,which can be generated from the flux-flow resistance,AC losses and normal-zone resistance. Hence the stability of a HTS coil under high pulse currents is a key problem. In this paper,a numerical model was set up to simulate the heat generation and quench propagation after a high pulse current was applied. The temperature distribution as a function of time in the coil was calculated. The simulation is in good agreement with the experimental results. In the AC cases,a maximum “safe” current can be calculated from our simulation,which will be very helpful for the design of HTS AC magnets and transformers.

关 键 词：稳定性 高温超导 数值模拟 交流损耗 麦克斯韦方程 热传导方程 温度分布 高温超导线圈 

分 类 号：O511[理学—低温物理]