Disclosed in the present invention are a dual-end monitoring-based
partial discharge source localization method and
system for high-frequency
partial discharge of a high-
voltage cable. The method comprises: acquiring operation data and
phase velocity test data of a high-
voltage cable; when a
partial discharge fault occurs in the high-
voltage cable, collecting partial
discharge signals on two sides of the high-voltage cable by means of sensors on the two sides of the high-voltage cable; performing
Fourier transform respectively on the basis of the partial
discharge signals on the two sides to obtain amplitude-frequency characteristics of the partial
discharge signals, and preprocessing the collected partial discharge signals on the basis of the amplitude-frequency characteristics to optimize and improve a
phase difference algorithm; and by incorporating the
phase velocity test data of the high-voltage cable, using the improved
phase difference algorithm to perform partial discharge
source localization on the faulty cable. In the present invention, dual-end monitoring is used to reduce the attenuation of signals caused by long-distance transmission, and synchronization of two sensors is performed using a
PTP protocol, effectively reducing errors; and in addition, during monitoring, partial discharge
source localization is performed using the improved
phase difference algorithm, which is conducive to resisting external interference, and there is no need to determine the
time of arrival, greatly improving the positioning accuracy.