VFTO Caused by Disconnecting Switch Operation in 500kV GIS Substation
This paper analyzes the features and hazards of very fast transient overvoltage (VFTO) caused by disconnecting switch operation in GIS.Then based on a 500kV GIS substation,it established a calculation model by using electro-magnetic transient simulation software ATP-EMTP,and thereby calculated and researched the VFTO caused by disconnecting switch operation in different modes,which provides reference to reliable operation mode decision in engineering.