110kV冷绝缘高温超导电缆本体绝缘设计

Insulation design of the 110kV cold dielectric high temperature superconducting cable

对国内第一根基于YBCO涂层导体的110kV冷绝缘高温超导(CD HTS)电缆本体绝缘进行了设计。根据冷绝缘HTS电缆的结构特点,通过分析不同绝缘材料的介电特性,应用电场有限元数值分析模型和理论模型,计算了超导电缆本体电场分布,研究了超导电缆主绝缘厚度与局部放电起始场强的定量化关系,最后给出了110kV冷绝缘HTS电缆主绝缘材料与厚度的设计方案。

In this paper, we designed the insulation of the first 110kV cold dielectric （CD） cable using YBCO coated conductor in China. According to the structure of the CD HTS cable, dielectric properties of different insulation materials were analyzed, electric - field distribution of the HTS cable was calculated by the finite element numerical analysis method, the quantitative relationships between insulation thickness and the partial discharge inception stress were studied based on the theoretical model. Finally, a design proposal about the insulation materials and its thickness for of the 110kV CD HTS cable was given.