Design and test of a 10 kV HV brushing for triaxial HTS cable termination

The high voltage (HV) bushing design of insulation core, umbrella skirt, lead type, and production process were proposed according to the technical requirements of the 10 kV high temperature superconducting (HTS) cable system of Shenzhen Power Supply Bureau. The design took full consideration of the withstanding voltage, impulse voltage, partial discharge, thermal shock, and anti-condensation level. According to the proposed design, a verification prototype was built and tested. It subjected to five slow 77 K-300 K thermal shock cycles and five severe 77 K-300 K thermal shock cycles to verify its performance. The sensitive electrical quantities were tested after each cycle. After the 10 cycles, no degradation of performance and no breakdown or flashover occurred were found in the prototype. The results show that the design is qualified for the expected purpose.

根据深圳电源供应局的10 kV高温超导（HTS）电缆系统的技术要求提出了绝缘芯，雨伞裙，铅类型和生产过程的高压（HV）衬套设计。该设计充分考虑了载有电压，脉冲电压，部分放电，热冲击和抗强化水平。根据拟议的设计，构建和测试了验证原型。它进行了五个慢速77 K-300 K热冲击周期和五个严重的77 K-300 K热冲击周期，以验证其性能。每个周期后测试敏感的电量。在10个周期之后，在原型中未发现性能降解，也没有发现故障或闪存。结果表明，该设计有资格用于预期目的。