摘要
大电流条件下超导带材的失超和耐受特性是超导限流器对带材用量选择的一个重要依据。本文建立了与实际工艺结构一致的带材几何物理模型,并考虑带材的失超及电热特性,用Matlab完成数值计算,在直流环境下,带材通以时长为30 ms、通流达3倍临界电流时,得到其电压、电流特性及温升大小,通过与实验对比,具有较好的一致性。同时,进一步进行了最大通流达5倍临界电流的极限冲击实验,根据实验现象预判了带材各层传热的动态过程,优化了数学模型,进而给出带材耐受电流及温度判据。
The quench and tolerance characteristics of tapes under high current conditions is an important basis for the selection of the dosage of the superconducting fault current limiter. In this paper, a geometric physical model of strip was established that was consistent with the actual process structure, and the numerical calculation was completed on Matlab, taking into account the loss of excess and the electrothermal characteristics of the tape. The voltage and current characteristics and temperature rise of the strip were obtained when the strip pass time was 30 ms and the pass current was 3 times of the critical current. The experimental and simulation results show that the strip has good consistency. Based on the experimental phenomena and considering the dynamic process of heat transfer in each layer of tape, the mathematical model was optimized, then the criteria of current and temperature tolerance of strip were given. The model established in this paper can effectively solve the quench characteristics of tape under high current impact and the selection of tolerance evaluation.
作者
柯其琛
徐国顺
庄劲武
张超
刘思奇
Ke Qichen;Xu Guoshun;Zhuang Jinwu;Zhang Chao;Liu Siqi(College of Electrial Engineering,Naval University of Engineering,Wuhan 430033,China;College of Electrial Engineering,Zhejiang University,Hangzhou 310058,China)
出处
《低温与超导》
CAS
北大核心
2019年第12期25-31,共7页
Cryogenics and Superconductivity
基金
国家自然科学基金项目(51607184)资助
关键词
YBCO超导带材
失超模型
层间传热
YBCO high temperature superconducting tape
Quench model
Interlayer heat transfer
