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Partial discharge within a spherical cavity in a dielectric material as a function of cavity size and material temperature

Partial discharge within a spherical cavity in a dielectric material as a function of cavity size and material temperature
Partial discharge within a spherical cavity in a dielectric material as a function of cavity size and material temperature
For high-voltage components, the measurement of partial discharge (PD) is a useful tool for performance assessment of electrical insulation. In this study, experimental measurements of PD activity for different spherical cavity sizes and material temperatures have been performed. A simulation model representing PD behaviour within spherical cavities in homogeneous dielectric materials has also been developed. The model has been used to study the influence of cavity size and material temperature on PD activity. Comparison of measurement and simulation results has been undertaken. The model uses a finite element analysis (FEA) method along with MATLAB code. It has been found that certain parameters in the model are both cavity size and temperature dependent. Thus, critical parameters influencing PD behaviour for different cavity sizes within the material and material temperatures can be identified; these are the charge decay time constant, cavity surface conductivity, electron generation rate (EGR), PD inception and extinction fields and the cavity temperature decay time constant.
1751-8822
52-62
Illias, H.A.
e79f56dd-c8b7-4973-9db5-d112e14a3249
Chen, G.
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Lewin, P.L.
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Illias, H.A.
e79f56dd-c8b7-4973-9db5-d112e14a3249
Chen, G.
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Lewin, P.L.
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e

Illias, H.A., Chen, G. and Lewin, P.L. (2012) Partial discharge within a spherical cavity in a dielectric material as a function of cavity size and material temperature. IET Science, Measurement & Technology, 6 (2), 52-62. (doi:10.1049/iet-smt.2011.0091).

Record type: Article

Abstract

For high-voltage components, the measurement of partial discharge (PD) is a useful tool for performance assessment of electrical insulation. In this study, experimental measurements of PD activity for different spherical cavity sizes and material temperatures have been performed. A simulation model representing PD behaviour within spherical cavities in homogeneous dielectric materials has also been developed. The model has been used to study the influence of cavity size and material temperature on PD activity. Comparison of measurement and simulation results has been undertaken. The model uses a finite element analysis (FEA) method along with MATLAB code. It has been found that certain parameters in the model are both cavity size and temperature dependent. Thus, critical parameters influencing PD behaviour for different cavity sizes within the material and material temperatures can be identified; these are the charge decay time constant, cavity surface conductivity, electron generation rate (EGR), PD inception and extinction fields and the cavity temperature decay time constant.

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Published date: March 2012
Organisations: EEE

Identifiers

Local EPrints ID: 336317
URI: http://eprints.soton.ac.uk/id/eprint/336317
ISSN: 1751-8822
PURE UUID: 6a1375fe-6696-4ead-81fa-8ca42e79e45a

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Date deposited: 21 Mar 2012 13:18
Last modified: 16 Dec 2019 20:39

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Contributors

Author: H.A. Illias
Author: G. Chen
Author: P.L. Lewin

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