Open AccessLumped-circuit Modeling of Surface Charge Decay in a Needle-plane geometry
Author(s) -
Xiaolei Wang,
Nathaniel Taylor,
Mohamad Ghaffarian Niasar,
Respicius Clemence Kiiza,
Hans Edin
Publication year - 2018
Publication title -
proceedings of the nordic insulation symposium
Language(s) - English
Resource type - Journals
ISSN - 2535-3969
DOI - 10.5324/nordis.v0i23.2486
Subject(s) - thermal conduction , materials science , plane (geometry) , voltage , dielectric , surface (topology) , geometry , corona (planetary geology) , space charge , surface charge , charge (physics) , mechanics , physics , electrical engineering , optoelectronics , electron , composite material , engineering , mathematics , nuclear physics , quantum mechanics , astrobiology , venus
Partial discharge (PD) tests were carried out in a needle-plane geometry where the plane was covered by a dielectric barrier. PDs were generated by the application of a periodic negative step voltage. A typical lumped circuit model of the dielectric was created to simulate the bulk and surface conduction of space charge decay processes during corona discharges. The comparison was made between the simulation and the experimental results at the first cycle of the applied voltage. The result shows that at a lower applied voltage, the surface charges decay slower because of a lower surface and bulk conduction, however, they decay faster with the increasing applied voltage due to the increasing conduction.