The influence of residual charge on surface discharge propagation

Abstract

The influence of residual charge on propagation of surface discharge is experimentally investigated using high-speed framing and streak cameras, and an electrostatic probe. When consecutive impulse voltages are applied 25 times with a change in polarity, the propagation length of the surface discharge increases gradually from 79 to 164 mm and hardly converges. Under such a condition, the potential gradient in the surface leader channel decreases with the consecutive number of impulses, while that in the surface streamer remains constant and the value is 0.5–0.6 kV mm−1. With the residual charge of a previous opposite polarity discharge on an insulator, the propagation velocity increases to three to eight times as large as that of the surface discharge on a clear insulator without any residual charge. The peak current of the surface discharge with a residual charge also becomes much higher than that without a residual charge.

Electrical and mechanical characteristics of surface AC dielectric barrier discharge plasma actuators applied to airflow control

“…The deposition of charges on the dielectric surface leads to a memory effect for the development of the successive discharges, and the (2007) stochastic behavior of the plasma formation is certainly governed by the charge deposited during the previous discharge as indicated by Zhu et al (1995). More recently, the influence of the residual charges on the propagation of the streamer channels has been investigated (Deng et al 2010). For pulse voltage, the residual charges are incriminated for modifications of the path of the streamer channels and branching as well as for modifications of the propagation velocity of the streamer channels.…”

Phase resolved cross-correlation spectroscopy on surface barrier discharges in air at atmospheric pressure

“…In case of sinusoidal driven VBDs the MD development in the volume (consisting of Townsend-prephase, cathode directed streamer, anode glow and decay phase) was found Send offprint requests to: brandenburg@inp-greifswald.de to be independent on the phase [6]. However, the MD development and distribution on the surface of the dielectric in all barrier discharges (VBD, CBD, SBD and so called sliding discharges) are influenced by residual charges [9][10][11][12]. On SBDs we found a similar behavior, which will be investigated in this contribution more detailed.…”

Surface charge influence on the flashover voltage of composite insulator model working at HVDC

“…The charge deposited on surface can have impact on both DC [4,5] and impulse [6,7] flashover value U f . So far carried studies show that surface discharge can result in charging the insulator surface [8][9][10].In the studies conducted so far with DC voltage (only negative polarity was used) hetero-charge (that is, a charge with opposite polarity as the polarity of the voltage) decreased absolute flashover value, while homo-charge (that is, a charge with same polarity as the polarity of the voltage) increased it. Measured influence was on the level of 10%.…”

“…Previous studies have been performed on models equipped with electrodes that their shapes differ from the typical, industrial fittings used on insulators [4][5][6][7][8][9][10].…”