Online GIS partial discharge detection method and device

The invention discloses an online GIS partial discharge detection method and device, and belongs to the technical field of live detection. An ultrahigh frequency acquisition signal is obtained through an ultrahigh frequency test module; an ultrasonic acquisition signal is obtained through the ultrasonic test module; performing feature signal extraction on the acquired ultrahigh frequency acquisition signal to obtain a waveform feature signal and an amplitude feature signal; the partial discharge analysis module sends the ultrasonic acquisition signal and the waveform characteristic signal obtained through analysis into a trained PSO-SVM-based combined prediction model, and outputs a corresponding fault level; and when the fault level is a serious state or an emergency state, sending the fault level, the ultrasonic acquisition signal, the amplitude characteristic signal and the waveform characteristic signal into a classification model based on an SVM algorithm to obtain a corresponding partial discharge fault