Optical arrangement method of lighting units in switchgear based on partial discharge luminosity distribution characteristics

Abstract

Partial discharge optical measurement has the characteristics of high sensitivity and strong anti-interference, but its detection effect is greatly affected by the deployment position of the sensor. Therefore, based on the radiation characteristics and transmission characteristics of optical signals, the deployment position of sensors in equipment is optimized. In this paper, an optimal layout scheme of switch cabinet lighting unit based on the distribution characteristics of partial discharge photometric is proposed. Firstly, the optical simulation model of switchgear cable room is designed, and the discharge light source is set at the typical fault location. According to the optical simulation results, the position sensor with high response intensity is selected for different discharge light sources. In order to prove the effectiveness of the layout scheme, the discharge optical detection experiment of switch cabinet was carried out. The results show that the sensor can detect discharge effectively in the selected installation position.