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

The influence of spherical cavity surface charge distribution on the sequence of partial discharge events
The influence of spherical cavity surface charge distribution on the sequence of partial discharge events
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.
0022-3727
1-15
Illias, Hazlee Azil
796ffe4e-32b5-4bb0-8699-52e4ccce1925
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Lewin, Paul
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Illias, Hazlee Azil
796ffe4e-32b5-4bb0-8699-52e4ccce1925
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Lewin, Paul
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e

Illias, Hazlee Azil, Chen, George and Lewin, Paul (2011) The influence of spherical cavity surface charge distribution on the sequence of partial discharge events. Journal of Physics D: Applied Physics, 44 (24), 1-15.

Record type: Article

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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Published date: 1 June 2011
Organisations: Electronics & Computer Science, EEE

Identifiers

Local EPrints ID: 272395
URI: http://eprints.soton.ac.uk/id/eprint/272395
ISSN: 0022-3727
PURE UUID: b0db3416-c8c7-4bd5-925f-ccbcaf1a46c0

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Date deposited: 01 Jun 2011 14:47
Last modified: 09 Dec 2019 20:09

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