20kA高温超导电流母线本体的绕制和实验  

Fabrication and test of HTS bus conductor with capacity of 20kA

作　　者：王银顺[1] 张丰元[2] 高智远[2] 朱志芹[2] 戴少涛[2] 林良真[2] 肖立业[2] 

机构地区：[1]北京市高压与电磁兼容重点实验室,华北电力大学电气与电子工程学院,北京102206 [2]中国科学院电工研究所应用超导实验室,北京100190

出　　处：《低温与超导》2010年第8期40-43,共4页Cryogenics and Superconductivity

基　　金：科技部“863”项目(2006AA03Z210);高等学校博士学科点专项科研基金(D00033);华北电力大学校内基金(KH0194)资助

摘　　要：系统描述了20kA、5米长高温超导电流母线本体的绕制、焊接及实验。超导母线本体设计采用成熟的均流技术设计,在自主开发的专用绕线机上进行绕制。超导线采用B i2223/Ag多芯不锈钢加强带材。在超导带材与端部焊接过程中采用新的焊接技术,保证了超导性能不退化和减小接触电阻。对绕制的超导母线本体进行了直流实验。实验结果表明,两端端部接触电阻小于10nΩ,超导母线的临界电流大于32kA,满足设计指标要求。Winding,jointing and test of a high temperature superconducting（HTS） bus conductor with length of 5 meter and capacity of 20kA were systematically described.The conductor structure was designed by adopting the mature technology of uniform current and wound by our developing winding machine.Hermetic stainless steel-reinforced multifilamentary Bi2223/Ag tapes were used in the conductor.A new soldering technology was adopted between HTS tapes and terminations so that superconducting characteristics did not degrade and the jointing resistances were as small as possible.The HTS bus conductor in DC mode was tested in 77K,the results show that the contacting resistances between two terminations are smaller than 10n and its critical current is larger than 32kA,which indicates that it meets design requirement.

关 键 词：超导母线 焊接 临界电流 接触电阻 

分 类 号：TM26[一般工业技术—材料科学与工程]