1100kV盆式绝缘子研制开发

Development of 1100 kV Spacer

在气体绝缘金属封闭开关设备(GIS)中,盆式绝缘子起着隔离相邻气室、支撑导体及绝缘的重要作用,研制开发高参数、高性能的1 100 k V盆式绝缘子是保证1 100 k V特高压GIS安全可靠运行的基础。详细介绍了所研制开发的1 100 k V盆式绝缘子的设计特点;应用有限元分析计算软件对其绝缘性能和机械性能进行了详细的计算分析,计算结果表明:接地屏蔽环可以有效降低其三交区电场强度。介绍了1 100 k V盆式绝缘子的浇注工艺。该1 100 k V盆式绝缘子在产品质量检测中心顺利通过了整套型式试验,其雷电冲击耐受水平高达2 880 k V,爆破压力最低达3.15 MPa,最高达4.0 MPa,验证了其绝缘性能及机械性能的高可靠性。

In GIS, the spacer is used for separating adjacent gas compartments, supporting conductor, and insulation. Development of a reliable 1 100 kV spacer is very important to ensure the safe service of a1 100 kV GIS. In this paper, the characters of the 1 100 kV spacer developed by NHVS are introduced,and its dielectric performance and mechanical performance are computed with a finite element analysis software. The results show that the grounding shield ring can weaken the electric field strength in the triple zone. The casting process of the spacer is also introduced. This 1 100 kV spacer has passed type test in High Voltage Apparatus Quality Test ＆ Research Center, where its lightning pulse withstand voltage reached 2 880 kV, and its minimum and maximum burst pressure reached 3.15 MPa and 4.0 MPa,respectively, verifying its high dielectric and mechanical performances.