高温超导电缆屏蔽层中电流分布的仿真模型研究

Study on current distribution simulation model of the shielding layer for high temperature superconducting cable

高温超导电缆运行过程中,因其传输电流密度高,会对外部环境产生较大的电磁污染,需要对超导电缆进行电磁屏蔽。根据三相统包高温超导电缆结构,搭建了一种电路仿真模型,基于有限元仿真分析,对电路模型中的等效分布电容、等效电感、等效电阻进行了计算。分析了在三相对称、单相断路情况下电缆的运行情况,基于仿真模型,可对三相统包电缆屏蔽层屏蔽效果进行仿真测试分析,并对屏蔽层在不同工况下的通流情况进行指导设计。

During the operation of HTS cable, electromagnetic pollution will be produced due to its high transmission current density, so it is necessary to shield the HTS cable. In this paper, a circuit simulation model was built according to the structure of three-phase HTS cable. Based on the finite element simulation analysis, the equivalent distributed capacitance, equivalent inductance and equivalent resistance in the circuit model were calculated respectively. HTS cable under symmetrical operation and two-phase operation was also analyzed. Based on the simulation model, the shielding effect of the three-phase HTS cable can be simulated, tested and analyzed, and the current excitation plan of the shielding layer under different working conditions can also be guided and designed.