Identification of fundamental forms of partial discharges based on the results of frequency analysis of their acoustic emission

The paper presented the spectral analysis of acoustic emission pulses generated by a sort of discharges on indeterminate-potential particles moving in liquid dielectric materials. Amplitude and power density spectra for the pulses was computed, followed by the derivation of their descriptors characterizing the discharges in a synthetic way. Some interesting properties of the discharges ware extracted from the descriptors, contributing to possible use of the method in diagnostics of insulating systems in electric power facilities.