Title :
Influence of profiles on DC insulator performance under polluted conditions
Abstract :
A dynamic model is used to investigate the effect of insulator profiles on DC pollution flashover voltage. The purpose is to aid in the design of insulators by supplementing laboratory and field measurements by an analytical model. The model computes the pollution flashover voltage (FOV) for a given degree of salinity by simulating the arc propagation along the leakage path. The change in the arc resistance and other quantities are calculated dynamically. It is observed that insulators with alternate long and short underribs and a wider gap between the rib tips have higher FOVs than other designs. It is seen that the influence of diameter on the FOV and hence on mm/kV is appreciable irrespective of the type of profile
Keywords :
air pollution; arcs (electric); flashover; insulators; DC insulator performance; DC pollution flashover voltage; FOVs; analytical model; arc propagation; dynamic model; field measurements; leakage path; polluted conditions; rib tips; salinity; underribs; Analytical models; Computational modeling; Electrical resistance measurement; Flashover; Geometry; Insulation; Laboratories; Pollution measurement; Solid modeling; Voltage;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1992. Annual Report. Conference on
Conference_Location :
Victoria, BC
Print_ISBN :
0-7803-0565-5
DOI :
10.1109/CEIDP.1992.283191
