SF6/N2混合气体的126 kV GIS母线的研制

Development of SF6/N2 Mixed Gas in 126 kV GIS Bus

母线是GIS设备的主要导电回路,设计具有高参数、高性能的母线结构是保证特高压GIS设备可靠运行的基础。现在大部分的GIS母线在使用绝缘性能较好的SF6气体作为绝缘介质。介绍了126 kV GIS用SF6/N2混合气体母线的相关参数、气体混合比的选择及环境经济效益,对混合气体母线的绝缘性能和温升性能进行了详细的分析计算,型式试验的顺利通过验证了SF6/N2混合气体母线的可靠性。

Bus is the main conductive loop of GIS equipment.The design with high parameters and high performance bus structure is the basis to ensure the reliable operation of UHV GIS equipment.At present,most GIS bus use better insulation performance SF6 gas as insulation medium.This paper introduces the related parameters,selection of gas mixture ratio,environmental and economic benefits of SF6/N2 mixed gas bus used in 126 kV GIS.It analyzes in detail and calculates the insulation performance and temperature rise performance of SF6/N2 mixed gas bus.It verifies the reliability of SF6/N2 mixed gas bus through type tests.