Spectral characteristics of discharges from artificial charged aerosol cloud

Abstract

Application of the artificial clouds of charged water aerosol capable to initiate discharges inside clouds and between cloud and ground could help on the solving of problem of separation of the lightning intracloud and ground discharges, and establishment of connections between the parameters and the spectral characteristics of discharge current impulses and its electromagnetic radiation. Results of analysis of spectral characteristics of discharge from artificial thundercloud and radiation created by them in near field using two kinds of wavelets are presented. Characteristics frequency ranges for different stages of discharge formation and its radiation are analyzed. Comparison between the discharge current parameters and the parameters of its electromagnetic radiation and wavelet characteristic frequencies has been fulfilled. Application of received results to the analysis of electromagnetic radiation signals registered during the different stages of lightning is discussed.

Physical Simulation of the Spectrum of Possible Electromagnetic Effects of Upward Streamer Discharges on Model Elements of Transmission Line Monitoring Systems Using Artificial Thunderstorm Cell

“…A generalization of the spectral characteristics of the signals induced by the electromagnetic radiation of the nearby impulse streamer corona flash on model elements of different types showed the close values of all frequency parameters inside every group of the electric amplification coefficient for rod and elongated model elements (Tables 6 and 7). The maximal values of the upper level of the characteristic frequency in the wavelet spectrum of the induced signal (the electromagnetic radiation of upward streamers was sometimes in the range of 1.0-1.5 GHz) were discovered in group II (an amplification coefficient of [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. Group III (amplification coefficient > 25) showed similar, but slightly lower, values.…”

“…The spectral characteristics of the discharge current and the induced signals were determined based on a wavelet analysis, using the specially created program and the "Mexican Hat" wavelet [23,24]. In mathematics, a wavelet series is a representation of a square-integrable (real-or complex-valued) function by a certain orthonormal series generated by a wavelet.…”

Simulation and Analysis of High Voltage Engineering in Power Systems

“…More often than not, guy wires are used in the dead-end, transformer poles and also in the angles of the line route. Guy wire is modeled by an equivalent constant parameter (CD) line model with a surge impedance of 450 Ω [38,39]. Guy wire earthing system can be modeled as a constant resistance since the current conducted through this wire is relatively low and does not initiate the soil ionization [40].…”

“…However, in this work, due to considering the arsenic-impregnated pole under the wet condition, which has a relatively low resistance, the earthing system described in Section 2.5 is used. The distance of the guy wire from the metallic part of the cross arm is 2 m. It is worth mentioning that, for the guy wire earthing system, the footing resistance is considered to be 40 times higher than the pole grounding resistance [38].…”

Spectral Characteristics of Electromagnetic Radiation of Cloud Discharges Trigged by Model Hydrometeors in an Artificial Thunderstorm Cloud

“…Among the various types of wavelets that are used to analyze the electromagnetic radiation of lightning and other atmospherics, the wavelet of the DOG wavelet family was chosen-a "sombrero," which is considered the most suitable for rapidly changing signals such as cloud discharges [12,13]. Typical patterns of cloud discharges triggered by the HM groups in the ATC for two variants of the HM location in the cloud are shown in Fig.…”