Application of Infrared Thermal Imaging Technology to Detection of Low and Zero Resistance Insulators

Under the long-term effects of mechanical and electrical load,lightning and nature environment factors,the insulators' electrical insulation properties will gradually decline,and eventually lost,which make a hidden danger on the safe and stable operation of power grid.So it's necessary to run regular insulation detection for insulators.However,the currently used online detecting methods such as spark gap method,voltage distribution measuring and insulating resistance measuring method have shortcomings of high work strength and low work efficiency.This paper raises the infrared thermal imaging technology for online insulator detection,by measuring the insulator string temperature distribution to judge insulator insulation.This method doesn't need artificial climbing tower,has advantage of less work strength and high efficiency,and verifies the validity of the infrared thermal imaging technology through test.