Cable insulation degradation type discrimination method and system

The invention discloses a cable insulation degradation type discrimination method and system. The method comprises the following steps: acquiring a current waveform in a power-on experiment; intercepting a picture of a synthetic wave containing at least one complete period in the current waveform; obtaining harmonic characteristic values of the synthetic waves and contribution degrees of harmonic waves in the synthetic waves; obtaining a corresponding degradation type according to the contribution degree of the harmonic wave in the synthetic wave; constructing a cable insulation degradation type discrimination model; and associating and binding the picture containing the synthetic wave of the at least one complete period with the corresponding degradation type to serve as a training picture, and training a cable insulation degradation type discrimination model to obtain a trained cable insulation degradation type discrimination model. According to the method, the picture fragment of the synthetic wave is used