高温超导电缆电磁结构的优化设计

Optimun design of electromagnetic structure for HTS cable

高温超导电缆层间电流分布不均是超导电缆研究的重要问题之一,调整电磁结构是使其各层电流分布趋于均衡的有效途径。文中建立了电缆本体的电路矩阵方程,分析了导电层电流及其产生的磁场,推导了各导电层自感和层间互感的计算公式。在此基础上,给出了以电缆各层电流均衡为目标的优化函数,并用该函数对超导电缆实例进行了结构优化。仿真结果表明,优化后电缆的各层电流分布趋于均衡。

The uneven current distribution between layers of high temperature superconducting （HTS） cable is one of the key problems of superconducting cable research. Adjusting the electromagnetism structure is a effective way to balance the current be- tween the layers. In this paper, we built the circuit matrix equation of the cable body, analyzed the current in conducting layers as well as the magnetic field it generated, gave the expressions of the self- inductance and the mutual inductance of the conduc- ting layers. Based on this research, a optimization function with the goal of balance the current between the cable layers was es- tablished, with which a structure optimization for superconducting cable examples was conducted. Simulation results indicate that the current in conducting layers tends to balance after optimization.