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中文摘要：
由于SF6的强温室效应,其在GIS中的使用受到越来越大的阻力,为了减少SF6气体用量,采用SF6/N2混合气体是一种可行的替代方法。沿面绝缘是GIS中最为薄弱的环节,对SF6/N2混合气体中沿面放电的研究现状进行了综述。研究表明电荷在绝缘表面的积聚会很大程度畸变电场,从而造成沿面闪络电压下降,SF6/N2混合气体中存在着流注与先导放电,基于数值仿真的流注放电发展过程并不能完全反映SF6/N2混合气体中放电发展的全过程,流注到先导放电的转化机理的得出需要在仿真与实测结果的相互验证后得出。
英文摘要：
Because of the strong greenhouse effect of SF6 gas, its usage is now increasingly limited. To decrease the usage of SF6, the application of SF6/N2 mixture gas is an alternative way. Surface insulation is the weakest point for GIS, the charge accumulation on insulator surface can greatly distort the local electrical field and trigger the surface discharge when suffered from overvoltage. In SF6/N2 mixture gas, under certain conditions, the surface streamer will transit into leader. The streamer propagation based on numerical simulation can not reveal the whole process of discharge propagation. The mechanism of surface discharge in SF6/N2 mixture gas can be concluded after examining both experimental measurement and numerical simulation.
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