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Partial Discharge Behavior within a Spherical Cavity in a Solid Dielectric Material as a Function of Frequency and Amplitude of the Applied Voltage

Partial Discharge Behavior within a Spherical Cavity in a Solid Dielectric Material as a Function of Frequency and Amplitude of the Applied Voltage
Partial Discharge Behavior within a Spherical Cavity in a Solid Dielectric Material as a Function of Frequency and Amplitude of the Applied Voltage
Modeling of the partial discharge (PD) process allows a better understanding of the phenomena. In this paper, a simulation model for spherical cavities within a homogeneous dielectric material has been developed. The model is implemented using Finite Element Analysis (FEA) software in parallel with a mathematical package. This method provides many advantages over previous PD models because discharge events can be simulated dynamically and the electric field in the cavity can be calculated numerically. The model has been used to study the effect of different amplitudes and frequencies of the applied voltage and simulation results have been compared with experimental measurement results. It is found that certain model parameters are dependent on the applied stress and parameters that clearly affect PD activity can be readily identified, these parameters include; the electron detrapping time constant, the cavity surface conductivity, the initial electron generation rate and the extinction voltage. The influence of surface charge decay through conduction along the cavity wall on PD activity has also been studied.
Partial discharges, finite element analysis, insulation diagnostics
1070-9878
432-443
Illias, Hazlee
6432a87a-cbba-4321-b8bd-7802a087563f
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Lewin, Paul
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Illias, Hazlee
6432a87a-cbba-4321-b8bd-7802a087563f
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Lewin, Paul
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e

Illias, Hazlee, Chen, George and Lewin, Paul (2011) Partial Discharge Behavior within a Spherical Cavity in a Solid Dielectric Material as a Function of Frequency and Amplitude of the Applied Voltage. IEEE Transactions on Dielectrics & Electrical Insulation, 18 (2), 432-443.

Record type: Article

Abstract

Modeling of the partial discharge (PD) process allows a better understanding of the phenomena. In this paper, a simulation model for spherical cavities within a homogeneous dielectric material has been developed. The model is implemented using Finite Element Analysis (FEA) software in parallel with a mathematical package. This method provides many advantages over previous PD models because discharge events can be simulated dynamically and the electric field in the cavity can be calculated numerically. The model has been used to study the effect of different amplitudes and frequencies of the applied voltage and simulation results have been compared with experimental measurement results. It is found that certain model parameters are dependent on the applied stress and parameters that clearly affect PD activity can be readily identified, these parameters include; the electron detrapping time constant, the cavity surface conductivity, the initial electron generation rate and the extinction voltage. The influence of surface charge decay through conduction along the cavity wall on PD activity has also been studied.

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Published date: March 2011
Keywords: Partial discharges, finite element analysis, insulation diagnostics
Organisations: Electronics & Computer Science, EEE

Identifiers

Local EPrints ID: 272131
URI: http://eprints.soton.ac.uk/id/eprint/272131
ISSN: 1070-9878
PURE UUID: 8c932ff5-e153-47ae-b044-e21999f11122

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Date deposited: 29 Mar 2011 08:44
Last modified: 09 Dec 2019 20:09

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