Title :
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
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;
Conference_Titel :
Electrical Insulating Materials (ISEIM), Proceedings of 2011 International Conference on
Conference_Location :
Kyoto
Print_ISBN :
978-4-88686-074-3
DOI :
10.1109/ISEIM.2011.6826278
