Influence of Metal Particles with Different Morphologies on the Electric Field Distribution and Discharge Characteristics of Basin - Type Insulators in GIS

Gas - Insulated Switchgear (GIS) is widely used in the high - voltage power transmission field. In recent years, surface flashover faults have occurred frequently. Metal particles are one of the main causes of GIS equipment failures. Therefore, it is of great significance to study the influence of metal particles on GIS equipment. This paper studies metal particles with different end morphologies located at the triple - junction point at ground potential. Experiments and simulations are carried out on cylindrical, conical, and irregular needle - shaped particles respectively. The influences of metal particles with different end morphologies on the electric field distribution of basin - type insulators in GIS and their discharge characteristics are obtained. The results show that the degree of discharge intensity and the magnitude of the electric field strength are as follows: irregular needle - shaped particles > conical needle - shaped particles > cylindrical particles. The morphology of the particle ends has an impact on both the electric field distribution and the discharge characteristics.