特高压直流SF_6气体绝缘穿墙套管绝缘结构设计研究进展

Research Progress in Insulation Structure Design of UHVDC SF_6 Gas-insulated Wall Bushing

特高压直流穿墙套管作为换流站中连接阀厅和直流场的唯一通道,是承载系统全电压、全电流的核心设备。本文综述了特高压直流SF_6气体绝缘穿墙套管的研发和应用进展,讨论了该类套管的绝缘特性和绝缘结构设计方法,以及国产套管的组成、外绝缘设计和结构形式,并提出了当前绝缘结构设计中需要解决的问题。

UHVDC wall bushing is a key equipment which connects valve hall and DC yard in converter station, and it loads total voltage and current. In this paper, the research and application progress of UHVDC SF6 gas-insulated wall bushing was reviewed. The insulation characteristics and insulation structure design mehods of these bushings, and the components, outdoor insulation design and layout of domestic bushings were discussed. The problems need to solved in the design of insulation structure at present were proposed.