The application of gas insulated substation(GIS) has expended year by year, Harm of the very fast transient voltages (VFTO) caused during disconnecting switches (DS) operation becomes more obvious.

• 随着超高压气体绝缘变电站(GIS)的广泛使用,由隔离开关(DS)操作引起的快速暂态过电压(VFTO)的危害更加明显。