Insulator String Flashover Modeling with the aid of an ATPDraw Object

Inhalt:
Accurate modeling of line insulation flashover is very important in evaluating the fast-front surges arising at overhead transmission lines and impinging on the connected substations. A new ATPDraw object, called ISF, has been developed with the aid of which insulator string flashover is modeled on the basis of several flashover models from literature. The ISF object was employed in ATP-EMTP simulations of a 150 kV GIS substation. The computed backflashover surges impinging on the substation vary considerably among the insulator string flashover models employed in simulations. The ISF object is a useful tool within the ATP-EMTP environment for insulation co-ordination studies. The effects of insulator string flashover modeling on backflashover surges arising at overhead transmission lines and impinging on the connected substations can be easily quantified.