冷绝缘超导电缆绝缘材料测试综述

Summary of dielectric material testing for CD HTS cable

绝缘材料在液氮中的各种性能将直接影响到冷绝缘高温超导(HTS)超导电缆的质量。对四种绝缘材料:电缆纸、聚丙烯层压纸、聚酰亚胺薄膜和低密度聚乙烯薄膜在常温和低温下的电阻率、介电常数、介质损耗角正切、低温介电强度和局部放电进行实验研究和对比,得到了有价值的数据。

Performances of the dielectric material in liquid nitrogen will directly affect the quality of the cold dielectric high temperature superconducting （HTS） cable. In this paper, performances of four dielectric materials of cable paper, PPLP, PI film and LDPE film, such as resistivity, permittivity（ e）, dielectric tangent loss（ tan 8）, Breakdown strength and Partial discharge, were measured at cryogenic and usual temperature. These are very precious statistics, for some data are not recorded in the literature as far as searched.