Experimental Study of Ultraviolet Corona Photon Counting Based on Image Features of Substation Electrical Equipment

Abstract

When ultraviolet (UV) spectral light is used to detect corona, the photon counting is used to judge the intensity of the corona discharges. However, there are many factors that would affect the photon counting, such as detection distance, instrument gain and weather, etc. In this paper, we studied the shape features of the electrical equipment, and proved that the image width of the electrical equipment is in square and proportional relation to the photon counting. Finally, the method of calculating the ultraviolet corona photon counting was also discussed to remove the distance effect, which could improve the judgment of the intensity of corona discharges.