高温超导直流能源管道电磁仿真分析

Electromagnetic simulation and analysis of conductors in HTS DC energy pipeline

高温超导直流电缆具有高电流密度、低损耗的优势,将液化天然气作为超导电缆的冷却液,可以实现电力与能源的一体化输送,提高传输效率的同时降低综合成本。因此,高温超导直流能源管道技术具有广阔的应用前景,其导体结构设计是相应过程中至关重要的问题。针对100 kV/1 kA高温超导直流能源管道导体部分建立三维电磁模型,对比单极性直线结构与螺旋结构、同轴双极性直线结构与螺旋结构在电流动态变化下的导体内部电流分布,研究导体螺旋结构对电流分布均匀性的影响。

HTS DC cable has the advantages of high current density and low loss. Using liquefied natural gas as the cooling fluid of superconducting cable can realize the integrated transmission of power and energy. As a result, the transmission efficiency can be improved and the overall cost can be reduced. Therefore, HTS DC energy pipeline technology has broad application prospects in the future transmission field and the design of its conductor structure becomes a crucial issue. A three-dimensional electromagnetic model was established for the conductor part of 110 kV/1 kA HTS DC energy pipeline.By comparing the current distribution in conductors of unipolar linear structure with helical structure, coaxial bipolar linear structure with helical structure, the influence of helical structure on the uniformity of current distribution was studied.