高压真空绝缘组合电器的技术可行性

Technical feasibility of high voltage vacuum insulated switchgears

人们一直在寻找在高压开关设备中SF6气体的替代品,真空是备选方案之一。该文从真空度维持、真空绝缘、真空电力设备的散热能力3个方面,通过文献调研、结构设计和仿真计算,对采用真空替代SF6气体作为高压组合电器主绝缘介质,即采用高压真空绝缘组合电器(VIS)的可行性进行了分析和论证。结果表明:在采用现有技术、无现场真空泵、使用常规散热措施的情况下,真空度维持20 a的72.5 kV/2 kA的VIS具备实现的技术可能性。

Vacuum is promising to substitute SF6 in high voltage switchgears.This paper focuses on the feasibility of using vacuum as the primary insulation medium in a vacuum insulated switchgear（VIS）.The vacuum system maintainability,insulation performance and heat dissipation were investigated based on the literature review,construction design,and simulation.The results show that a 72.5 kV/2 kA VIS with a vacuum maintenance life of 20 years is technically feasible at current technology level,without on-site vacuum pumps and unconventional cooling measures.