Influence of Different Measuring Positions on Infrared Detection of Deteriorated Composite Insulators

Infrared detection of composite insulators by manual and aircraft patrol is an effective measure to find the deterioration and defects of composite insulators. However, the measuring position will have a great impact on the infrared measurement of composite insulators, which needs to be deeply studied. In this paper, the infrared detection tests at different positions were carried out for the deteriorated composite insulator taken from the transmission line, and the variation characteristics of the maximum temperature, minimum temperature and temperature difference of the deteriorated composite insulator with the test time at different measuring positions are obtained. It is found that when the measuring position is perpendicular to the deterioration position of the composite insulator string, the influence of adjacent insulators on defect detection is the smallest. Moreover, the conclusion is verified by the helicopter infrared temperature measurement test of the actual composite insulator at different positions.