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The influence of spherical cavity surface charge distribution on the sequence of partial discharge events

Author: Illias, Hazlee A; Chen, George; Lewin, Paul L
Edition/Format:   Downloadable archival material : English
Publication:Journal of Physics D: Applied Physics
Database:WorldCat
Summary:
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  Read more...
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Genre/Form: article in peer-reviewed journal
Material Type: Internet resource
Document Type: Internet Resource, Archival Material
All Authors / Contributors: Illias, Hazlee A; Chen, George; Lewin, Paul L
OCLC Number: 882807247
Language Note: English

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.

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