高压电器2018，Vol.54Issue(5)：17-25,32,10.DOI:10.13296/j.1001-1609.hva.2018.05.003
特高压GIS盆式绝缘子沿面闪络特性研究综述
Overview on the Surface Flashover of Basin-type Insulator in UHV GIS
孙秋芹 1罗宸江 1汪沨 1陈赦 1陈杰 2周志成 2王丽峰3
作者信息
- 1. 湖南大学电气与信息工程学院,长沙 410082
- 2. 国网江苏省电力公司电力科学研究院,南京 211103
- 3. 国网江苏省电力公司,南京 210029
- 折叠
摘要
Abstract
Basin-type insulator is the most vulnerable component of gas insulated switchgear (GIS). In this work, the defect types of GIS are firstly analyzed, and the failure rate is calculated. Then, the factors influencing the surface flash-over of basin-type insulator, including the metallic particle contamination, the spacer surface defect as well as the surface charge, are systematically elucidated. The charging process and forces applied on the metallic particle is presented;the motion characteristics and suppressing techniques for metallic particle are discussed in detail. Regarding the surface defect of basin-type insulator, the defect types, the evolution of deterioration and detecting methods are over-viewed. In the case of DC voltage, charges are often accumulated around spacer surface, leading to the surface flash-over. The mechanism, the measurement methods as well as the dynamics of space charge are also summarized in this work. Furthermore, to address the surface flashover issue, the suppressing techniques, including the profile optimization, the use of dielectric coating and the functionally graded material, are comparatively analyzed. Their characteristics and applications are discussed. Both the advantages and drawbacks of them are summarized. Finally, several suggestions on spacer design have been proposed for with respect to the ongoing UHV transmission project in China.关键词
气体绝缘金属封闭开关设备/盆式绝缘子/沿面闪络/金属颗粒/表面电荷/功能梯度材料Key words
gas insulated switchgear (GIS)/basin-type insulator/surface flashover/metallic particle/surface charge/functionally graded material引用本文复制引用
孙秋芹,罗宸江,汪沨,陈赦,陈杰,周志成,王丽峰..特高压GIS盆式绝缘子沿面闪络特性研究综述[J].高压电器,2018,54(5):17-25,32,10.
