Analysis of Radio Frequency and Ultraviolet Signals Emitted by Surface Partial Discharges

Partial discharges (PD) occurring in high-voltage insulation systems can cause equipment failures and pose safety hazards. Commonly used techniques for detecting and characterizing PD activity, especially on the surface of insulation systems, include radio frequencies signal analysis and detection of ultraviolet radiation emissions. The aim of the research work was to perform a comparative analysis of the signals emitted by surface partial discharges in radio frequencies and the phenomena accompanying ultraviolet radiation emissions, as well as indicating possible directions for further basic research aimed at building a knowledge base and improving measurement methods. This paper presents an analysis of VHF, UHF and UV signals emitted by surface PD generated under laboratory conditions. The obtained results confirm that radio frequencies and UV signal analysis can provide important information about the activity and surface location of PD, including information on the intensity and nature of PD.