Spectral Characteristics of Signals Induced by an Artificial Thunderstorm Cell on Dummy Elements of OHPL Monitoring Systems Protected by Dielectric Shells

Abstract

The article presents the wavelet spectral analysis of signals induced by an artificial thunderstorm cell on dummy elements of OHPL monitoring systems protected by dielectric shells obtained by lightning–cyberphysical interaction modelling. Three types of electrode systems (sensors or transceiver antennas) with model dielectric shells are considered. The characteristic spectral ranges corresponding to the formation of streamer flashes and reverse discharges from a dielectric-embedded model electrode are determined. It is established that the spectral characteristics of the induced signals depend on the model electrode parameters and the dimensions of the dielectric shells. Higher values of maximum frequencies in the signals spectrum (current pulses) are characteristic of smaller dielectric shells. It is established that an increase in the upper chamber of the dielectric-embedded model electrode to a decrease in the average values of the maximum spectrum frequency of the signal recorded on the model electrode during the development of a streamer flash from its top. The presence of frequency ranges of a few to tens of megahertz in the spectrum of signals induced by an artificial thunderstorm cell on dummy elements of OHPL monitoring systems protected by dielectric shells, which can cause false alarms and sensor malfunctions, analog-to-digital converters, and information-transmission devices, is noted. All this should be taken into account when analyzing the possible impact of electromagnetic radiation of atmospheric electricity and lightning on the elements of intelligent monitoring systems and on diagnostics and control of power facilities, which include components made of dielectric and composite materials.