Document Type
Article (Restricted)
Publication Date
6-1-2011
Abstract
In this work, a model representing partial discharge (PD) behaviour of a spherical cavity within a homogeneous dielectric material has been developed to study the influence of cavity surface charge distribution on the electric field distribution in both the cavity and the material itself. The charge accumulation on the cavity surface after a PD event and charge movement along the cavity wall under the influence of electric field magnitude and direction has been found to affect the electric field distribution in the whole cavity and in the material. This in turn affects the likelihood of any subsequent PD activity in the cavity and the whole sequence of PD events. The model parameters influencing cavity surface charge distribution can be readily identified; they are the cavity surface conductivity, the inception field and the extinction field. Comparison of measurement and simulation results has been undertaken to validate the model.
Keywords
Partial discharge
Corp List
University of Malaya, Malaysia,University of Southampton, UK,University of Southampton, UK
Divisions
sch_ecs
Publication Title
Journal of Physics D: Applied Physics
Volume
44
Issue
24
Publisher
Institute of Physics