YBCO超导带材交流过流冲击下的稳定性  

Stability of YBCO HTS Tape with AC Over-Current at Power Frequency

作　　者：周义刚[1,2,3] 张正臣[1,2,3] 王银顺[1,2] 肖立业[1,2] 

机构地区：[1]中国科学院应用超导重点实验室,北京100190 [2]中国科学院电工研究所,北京100190 [3]中国科学院研究生院,北京100083

出　　处：《稀有金属材料与工程》2008年第A04期285-288,共4页Rare Metal Materials and Engineering

基　　金：国家"863"高技术基金项目(2006AA03Z210)

摘　　要：通过实验方式测量了各种交流过电流幅值以及持续时间情况下,YBCO超导带材电压、电流和温度,以及冲击后临界电流的变化情况,结合YBCO超导带材的过电流冲击下的热传导模型,以及液氮的热交换系数对YBCO超导带材过流冲击条件下的电及热特性进行分析,并根据对YBCO超导带材的性能退化与温度对应关系的分析,提出其过流冲击下的安全极限。研究结果可以为YBCO超导带材的性能优化和超导电力设备的设计提供有益的参考。The voltage, current and temperature of YBCO HTS tape were measured under conditions of AC over-current with various amplitude and duration time. The degradation of YBCO HTS tape was simultaneously analyzed. Based on heat conduction model of YBCO HTS tape, the heat transfer performance of liquid nitrogen was used to analyze the electrical and thermal performance of YBCO HTS tape. By means of analyzing the relations between degradation of YBCO tape and temperature, a safe limit of tape with over-current conditions was suggested. The results could be useful for optimization of YBCO HTS tape and design of superconducting electrical equipment.

关 键 词：YBCO超导带材 过流 热传导 

分 类 号：TM26[一般工业技术—材料科学与工程]