Research on Ultrasonic Detection Technology of Overhead Distribution Line

For overhead distribution lines, most of the conventional measurement techniques are manual inspection or regular preventive experiments. There are always differences between power failure state and operation state, which will affect the accuracy of detection results. In this paper, based on the ultrasonic detection method, a partial discharge online detection system is designed. By simulating the discharge, the propagation of partial discharge ultrasound in the air is detected and analyzed. The influence of different working frequency sensors on the detection results is compared, and the actual detection effect of the system on partial discharge ultrasound is obtained.