Study of ultraviolet online monitoring system for contaminant level of insulators
He Wei · Advanced Technology of Electrical Engineering and Energy · 2011
In some districts with severe air pollution,the flashover of insulators takes place frequently and threats the safety operation of power system.In order to realize real-time monitoring for the contamination state of insula-tors,this paper designed an ultraviolet monitoring system based on ultraviolet pulse method.Simulation tests were executed with this system on composite insulator FXBW-110 /70 and porcelain insulator XP-160 under different op-erating voltages and contamination levels with the presence of faulty insulators,then the number of ultraviolet pulses was counted and sent back to information center.The experimental results proved that the intensity of ultraviolet pulses can characterize the discharge level of contamination insulator,and the variation trend of ultraviolet pulses can distinguish if the discharge source is a polluted or a faulty insulator.This online monitoring system is a kind of non-contact detector with enough wide monitoring distance and low interference,which makes it possible to be ap-plied in overhead transmission line and power station.