Mechanical characterization of a 10-MJ HTS SMES magnet wound by quasiisotropic strands and directly stacked tape conductors  

作　　者：ZiKun Zhao Yinshun Wang Yubo Gao Zhao Yang ZhuYong Li Wei Pi 

机构地区：[1]State Key Lab.of New Energy Renewable Power System,North China Electric Power University,Beijing 102206,China [2]Key Lab.of HV and EMC Beijing,North China Electric Power University,Beijing 102206,China [3]Energy Singularity Energy Technolo-gy(shanghai)Co.,Ltd,ShangHai 200000,China

出　　处：《Superconductivity》2023年第1期69-74,共6页超导（英文）

基　　金：supported in part by the National Natural Science Foundation of China under Grant No.51977078.

摘　　要：A 10‐MJ‐class superconducting magnetic energy storage(SMES)magnet is designed and optimized in this study using quasi‐isotropic strands and stacked‐tape conductors.In order to ensure the stable operation of SMES systems,it is necessary to evaluate the mechanical properties risk caused by the Lorentz force.Therefore,in this study,the magnetic stress caused by the Lorentz force is analyzed using the finite element method.The results show that the tapes near the inner diameter of the magnet are subjected to a higher stress and require considerable support.Although the maximum stress is increased by two times due to the presence of the screening current,it is within the safety range.The screening current does not vanish after the discharge process.After discharge,the coil is still subjected to a stress on the other of a few MPa.

关 键 词：Lorentz force Quasi‐isotropic strand Superconducting magnetic energy storage Screening current Weibull distribution 

分 类 号：O17[理学—数学]