伞裙结构对超(特)高压电流互感器闪络特性影响的研究  

Study on Influence of Umbrella-skirt Structure upon the Flashover Characteristics of UHV Current Transformer

作　　者：张耀月 ZHANG Yaoyue(ANU College of Business and Economics,Canberra 2601,Australia)

机构地区：[1]澳大利亚国立大学商业与经济学院,澳大利亚堪培拉2601

出　　处：《电力安全技术》2024年第12期73-78,共6页Electric Safety Technology

摘　　要：500 kV SAS550型SF6气体绝缘电流互感器等径伞裙结构在雷雨天气条件下沿面爬电严重,极易形成闪络放电通道,同时也易在绝缘套管表面形成雨水导电通道,造成雷电波侵入引发贯穿闪络。分析该型号电流互感器因电场畸变造成的贯穿性闪络放电的故障特征及原因,针对类似结构的超(特)高压设备提出了改进策略,可为超(特)高压电流互感器设计、制造和安全运行提供借鉴。The equal-diameter umbrella-skirt structure of 500 kV SAS550 SF6 gas-insulated current transformer appears serious creepage along its surface in the thunderstorm cases,which is prone to form a flashover discharge channel as well as a rainwater conductive channel on the surface of the insulation casing,causing lightning wave invasion and leading to such a penetrating flashover.By analyzing the accident characteristics and fault causes of penetrating flashover discharge caused by electric field distortion of this type of current transformer,the improvement strategy is proposed for the UHV equipment with a similar structure,which is available for reference in the design,manufacturing and safe operation of UHV current transformers.

关 键 词：超(特)高压设备 SF6气体绝缘设备 电流互感器 贯穿闪络特性 

分 类 号：TM452[电气工程—电器]