高压电器2018，Vol.54Issue(5)：26-32,7.DOI:10.13296/j.1001-1609.hva.2018.05.004
SF6中环氧绝缘子结构对其闪络特性的影响
Influence of Epoxy Resin Insulator Structure on Its Flashover Characteristics in SF6
摘要
Abstract
Insulator flashover is one of the main failure modes of gas-insulated metal-enclosed switches. Increasing the flashover voltage of the insulator can effectively reduce the possibility of system failures. Previous studies have shown that insulator flashover under clean conditions mainly depends on the insulator surface electric field distribution, while the geometry of the insulator itself and its embedded and shielding electrodes can effectively adjust the electric field distribution along its surface. In this paper, epoxy post insulator samples were designed and casted. The distribution of electric field along the surface was regulated by changing the shape of the insulator, the embedded electrodes and the outer shielding electrodes. The negative standard lightning impulse generator was used to study the flashover characteristics of insulator samples immersed in 0. 2 MPa SF6. The finite element analysis method was used to determine the maximum value of the electric field along the insulator. According to the experimental and simulation results, the influence of insulator shape, embedded electrodes shape, and shielding electrodes shape on the insulator flashover characteristics is analyzed: the surface electric field of convex insulator has the best adjustability;the embedded electrodes can increase but can also reduce the flashover voltage of the insulator;the shielding electrodes can effectively uniform the electric field but may reduce the effective creepage distance along the insulator.关键词
GIS/环氧绝缘子/屏蔽电极/闪络电压/SF6/有限元/爬电距离Key words
GIS/epoxy resin insulator/surface electric field/flashover voltage/SF6/finite element/creepage distance引用本文复制引用
刘琳,李晓昂,赵军平,张乔根,马超群,梁成军,李志兵..SF6中环氧绝缘子结构对其闪络特性的影响[J].高压电器,2018,54(5):26-32,7.基金项目
国家电网公司科学技术项目(SGTYHT/15-JS-191).Project Supported by Science and Technology Project of State Grid Corporation(SGTYHT /15-JS-191). （SGTYHT/15-JS-191）
