Current-voltage Characteristics of Corona Discharges in a Needle Penetrating a Rogowski-Plate Arrangement

This paper presents the analysis of the effect of different influencing factors on corona discharge in a point-plate arrangement. Initially this arrangement was used for laboratory-scale experiments for modelling lightning attachment and then it was found a useful way of the investigation of industrial technologies applying corona discharge. In the paper, we are focusing on the properties of the corona in electrostatic precipitators. Laboratory measurements and numerical calculations were made to evaluate the modification of voltage-current characteristics related to the initial condition in different modes of operation and predict the effect of the change of certain parameters. For the reliable comparison, a reference arrangement was constructed to handle the uncertainty caused by the presence of dust particles and dust layer in point-plate and wire-plate electrode arrangements.