Method for positioning high-voltage apparatus electro-discharge source based on energy change

Disclosed is a method for positioning a high-voltage apparatus electro-discharge source based on energy change. According to the method, wavelet transformation is carried out on an original signal obtained by an externally arranged UHF sensor which is installed on a GIS basin-type insulator, interference noise signals, such as corona discharge signals, with radiation frequency less than 150 MHz in air are filtered, an electro-discharge waveform with a high signal to noise ratio is obtained, then the signal waveform is simplified and an electro-discharge starting point is detected, and finally the high-voltage apparatus local electro-discharge source is positioned according to the energy change of an electro-discharge signal. According to the method, time difference is obtained based on energy change so that the high-voltage apparatus local electro-discharge signal source can be positioned, the problems that high-voltage apparatus site local electro-discharge noise interference is intense and a local electro-discharge waveform is complicated are solved, environmental disturbance is reduced as much as possible, and then the popularization of a local electro-discharge monitoring system is facilitated.