中文摘要：

GIS以其较高的运行可靠性，易维护，占地面积小等优点在电力系统中得到了广泛的应用。但是，在隔离开关、接地开关和断路器的动作过程中，会出现快速暂态过程。主要表现为：GIS母线套管上的快速暂态过电压和GIS壳体上的暂态地电位升高以及GIS周围空间产生暂态电磁场。主要分析和探讨南快速暂态过程引发的暂态电磁场的产生和传播机理以及它对GIS的电缆出线和与GIS相连的变压器的影响。

英文摘要：

Gas insulated substation is widely applied in power system because of many advantages, including high reliability, easy maintenance, relatively less space etc. However, very fast transient （VFT） process can be produced, during the operating of disconnector switch, earth switch and circuit breaker. VFT is mainly characterized as very fast transient overvoltage on GIS bus-bar bushing, and as the raise of transient earth voltage on GIS enclosure, and as transient electromagnetic field （TEM） around the GIS. In this paper, the mechanisms about TEM generation and TEM production, caused by VFT, are analyzed. Meanwhile, the influences of VFT on the cable and the transformer connected with GIS are studied.