Development of Method for High-Voltage Electrical Equipment Insulators Monitoring in UHF Range of Electromagnetic Radiation

In the paper the results of the study on partial discharges (PDs) shape line distortion was presented. Theoretical PD signals are compared with model signals in the air gap of the needle surface system under the influence of both DC and AC applied voltage. The spectra of single PD pulses and their pulse sequences were simulated and based on this a criterion for detecting a PD source at the pre-breakdown situation was developed. An online diagnostic system based on the ultra-high-frequency (UHF) range of radio-frequency (RF) radiation was proposed. This paper may be of interest from the point of view for optimizing the sorting method of PD signals by amplitude, pulse duration, increasing the accuracy of evaluating their characteristics at the digital processing of PDs, for the development equipment of digital monitoring system in UHF range of RF radiation.