高温超导方形线分块均一化H模型的数值研究

Numerical study on the block homogenization H-model of HTS soldered-stacked-square wire

在对高温超导方形线的电磁特性进行有限元仿真时,针对方形线区域电流密度差异较大这一特征,在现有均一化技术的基础上提出了分块均一化方法,通过建立基于H方程的二维数值模型,从临界电流和交流损耗两个角度对其效果进行了评估,结果表明不同均一化模型得到的临界电流结果相近,但分块均一化模型得到的交流损耗结果具有更高的精度,验证了该方法的可行性,为后续方形线的三维复杂结构仿真提供了一种简化方法。

In the finite element simulation of the electromagnetic characteristics of high temperature superconducting(HTS)Soldered-Stacked-Square(3 S)wire,a block homogenization method was proposed on the basis of the existing homogenization technology aiming at the large difference in the regional current density of 3 S wire.By establishing a two-dimensional numerical model based on the H-formulation,its effect was evaluated from the two perspectives of critical current and AC loss.The results show that the critical currents obtained from different homogenization models are similar while the AC loss obtained by the block homogenization model has higher accuracy,which can verify the feasibility of this method and provide a simplified method for the subsequent three-dimensional complex structure simulation of 3 S wire.