Research on Imaging Technology of Ultrasonic Echo Applied to Live Detection of Switchgear Insulation Defects

The internal insulation defect is the main reason for the failure of high voltage switchgear. At present, there is a lack of effective technical means and methods for live detection of switchgear insulation defects. In this study, the artificial bee colony algorithm was improved to estimate the parameters of ultrasonic echo, then the imaging detection method of ultrasonic echo was proposed. Finally, the live detection system of switchgear based on ultrasonic echo imaging was constructed. Through test verification, it is concluded that: the improved artificial bee colony algorithm has high precision parameter estimation results, and the estimation error was less than 1%. Finally, the live detection system of switchgear based on ultrasonic echo imaging was applied in the field. The results show that: this system can fully reflect the internal defect morphology of switchgear insulation and can also meet the accuracy and real-time requirements of switchgear live detection system based on ultrasonic echo imaging.