Analysis of Pollution Performance On Insulators

In this work, a model based on field criterion has been developed to represent the flashover phenomenon, which occurs due to surface pollution on high voltage insulators, under ac voltage. The values of potential and electric field on an insulator surface have been determined. To study and compare the performance of a pin type insulator made up of porcelain and used in high voltage electricity transmission lines under normal conditions and under polluted conditions. On simulating these insulators in ElecNet software, Voltage and Electric Field distributions were studied and analyzed on both clean and contaminated insulators and then compared. New designs are available with more mechanical and flash over strength. To prevent the fog or water droplets from reaching the lower layers the post insulators are used with high radius of top most post. Other than this disc type insulators are used to keep the pollutant away from the central axis which is the most prone zone for flash over to occur.