The quantitative indicators of 750kV Porcelain Insulator in UV detection based on artificial contamination test

In the process of the operation of 750kV transmission line, the insulator should be detected in time and effectively. As a fast and efficient method to detect the discharge of insulators, the ultraviolet detection technique is very important in the detection of 750kV insulator. In this paper, we analyzed the ultraviolet detection result of the 750kV Porcelain Insulator artificial contamination test, and then defined two indicators, relative fluctuation of photon number and mean value of spot area to evaluate the severity of discharge. The two indicators, UV photon number and UV spot area were studied in this paper. It is found that UV photon number and UV spot area couldn't evaluate the severity of insulator discharge quantitatively, but relative fluctuation of photon number and stage mean value of spot area could quantitatively evaluate the severity of insulator discharge. The results of this paper is of great significance to the application of UV detection technology in the detection of 750kV insulator.