The embodiment of the invention provides a local
discharge signal identification method and device. The method comprises the following steps of obtaining and displaying an output
signal of high-
voltage equipment, wherein the output
signal comprises a pulse signal and a sinusoidal signal, and the pulse signal comprises a
target signal; carrying out
spectral analysis on the pulse signal to obtain a
frequency domain signal; carrying out band-pass filtering on the
frequency domain signal to obtain a band-pass
frequency domain signal; carrying out
time domain analysis on the band-pass frequency domain signal to obtain a
time domain signal, and obtaining the
target signal in the
time domain signal; according to the characteristics of a standard discharging signal, judging whether the
target signal is a local discharging signal. According to the embodiment of the invention, the target signal and an interference signal in the pulse signal are subjected to primary separation according to the correlation of the phases of the pulse signal and the sinusoidal signal in the output signal of the high-
voltage equipment, the characteristics of the target signal are compared with the characteristics of the standard discharging signal to determine whether the target signal is the local discharging signal, a phenomenon that the interference signal is wrongly taken as the local discharging signal is avoided, and detection accuracy is improved.