DocumentCode :
1380670
Title :
A finite element method for the determination of space charge distributions in complex geometry
Author :
Paris, O. ; Lewiner, J. ; Ditchi, T. ; Holé, S. ; Alquié, C.
Author_Institution :
Lab. d´´Electricite Gen., Ecole Superieure de Phys. et de Chimie Ind., Paris, France
Volume :
7
Issue :
4
fYear :
2000
fDate :
8/1/2000 12:00:00 AM
Firstpage :
556
Lastpage :
560
Abstract :
Electrical breakdown in insulators very often initiate near high field regions of the structure, as found near small-radius impurities or at electrode defects. This is attributed to the development of localized space charges. For this reason many efforts have been made to determine such charge. Various techniques are now available, but they are not directly applicable to complex geometries where it is difficult to determine analytically the field configuration and thus the relation between the measured variables and the space charge distribution. To solve this problem, we propose to use a numerical simulation using a finite element method (FEM). In this paper we describe how it can be implemented in the case of the pressure wave propagation (PWP) method. It is shown that measured signals in insulating samples with divergent electric field regions are well fitted by simulations. We show that this allows for the determination of space charge distribution in such samples
Keywords :
electric breakdown; finite element analysis; insulating materials; space charge; complex geometry; divergent electric field; electrical breakdown; electrode defect; finite element method; impurity; insulating material; numerical simulation; pressure wave propagation; space charge distribution; Charge measurement; Current measurement; Dielectrics and electrical insulation; Electric breakdown; Electrodes; Finite element methods; Geometry; Impurities; Numerical simulation; Space charge;
fLanguage :
English
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
Publisher :
ieee
ISSN :
1070-9878
Type :
jour
DOI :
10.1109/94.868077
Filename :
868077
Link To Document :
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