Electric power system insulator defect identification method and system based on ultrasonic detection

The invention discloses a power system insulator defect identification method and system based on ultrasonic detection. The system is a system capable of realizing the method. The insulator is a basin-type insulator, and the method comprises the following steps: obtaining the characteristics of a first class of echoes and the characteristics of a second class of echoes without defects on a beam path, the characteristics being ultrasonic wave travel or time; taking the characteristics as a crack defect identification basis, and completing insulator crack defect identification based on the identification basis, specifically, adopting an ultrasonic probe to emit ultrasonic waves at the refraction angle from the outer side surface of an insulator flange on the basin-type insulator, and obtaining a detection result of a reflection echo stroke or time; and comparing the detection result with the characteristics, and when the comparison result is that the detection result exceeds a set difference value, identifying