550 kV SF6 气体绝缘高海拔套管绝缘屏蔽结构

介绍了550 kV SF6气体绝缘金属封闭式组合电器（GIS）高海拔套管的绝缘屏蔽结构参数对电场分布的影响。针对套管单屏蔽结构方案，通过有限元法研究了接地屏蔽层翻边结构参数组合对套管内部最大电场强度的影响；研究了接地屏蔽层高度对GIS套管内外绝缘电场强度分布的影响。从而通过最优化接地屏蔽层高度和接地屏蔽层翻边结构参数组合，得到合理的套管内外电场分布，有效解决了高海拔型套管外绝缘修正后的内外电场分布均匀化问题，为550 kV SF6气体绝缘高海拔套管的绝缘结构设计提供了理论依据。

Structure Parameters of 550 kV SF6 Gas-Insulated Bushing Insulated Shielding Layer for High Altitude Localities

The impacts of the structure parameters of insulated shielding layer of 550 kV SF6 gas-insulated GIS bushing for high altitude localities on the electric field distribution is introduced. The impacts of shielding layer structure of different combinations of parameters on the maximum electric field strength are researched with the finite element method based on single shielding layer structure. And the impacts of shielding layer structure with different heights on the electric field distribution of the bushing are also researched. By optimizing the best shielding layer height and the best parameter combination of the shielding layer structure, the ideal internal and external electric field distribution of the bushing can be obtained. The internal and external electric field distribution of 550 kV SF6 gas-insulated GIS bushing for high altitude localities is thus effectively solved. A theoretical basis for design of 550 kV SF6 gas-insulated bushing insulation structure for high altitude localities is provided.