Effect of surface charge distribution on the electric field in a void due to partial discharges

Author

Illias, H. ; Chen, Gang ; Lewin, P.L.

Author_Institution

Dept. of Electr. Eng., Univ. of Malaya, Kuala Lumpur, Malaysia

fYear

2011

fDate

6-10 Sept. 2011

Firstpage

245

Lastpage

248

Abstract

After a partial discharge (PD) occurs within a dielectric bounded void, charge accumulation on the void surface have been found to affect the field distribution in the void. In this work, a simplified model of PD events of a spherical void within a homogeneous dielectric material has been developed using finite element analysis (FEA) software. The model has been used to study the influence of surface charge distribution on the electric field distribution in the void due to PD events. Surface charge distribution depends on charge propagation along the void surface during a PD occurrence and charge movement along the void wall through surface conduction after a PD occurs. Comparison between measurement and simulation results has been performed to validate the model.

Keywords

dielectric liquids; electric fields; finite element analysis; partial discharges; voids (solid); FEA software; PD events; PD occurrence; charge accumulation; charge movement; charge propagation; dielectric bounded void; electric field distribution; finite element analysis; homogeneous dielectric material; partial discharges; spherical void; surface charge distribution; surface conduction; void wall; Detectors; Dielectric measurement; Dielectrics; Universal Serial Bus; finite element analysis; insulation diagnostics; partial discharge; surface charge distribution;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulating Materials (ISEIM), Proceedings of 2011 International Conference on

Conference_Location

Kyoto

Print_ISBN

978-4-88686-074-3

Type

conf

DOI

10.1109/ISEIM.2011.6826278

Filename

6826278