A new flashover dynamic model of polluted HV insulators

In this work, a model based on field criterion has been developed to represent the flashover phenomenon, which occurs due to surface pollution on high voltage insulators, under ac voltage. The values of potential and electric field on an insulator surface have been determined using the finite elemen...

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Bibliographic Details
Published in:IEEE transactions on dielectrics and electrical insulation 2004-08, Vol.11 (4), p.577-584
Main Authors: Aydogmus, Z., Cebeci, M.
Format: Article
Language:English
Subjects:
Criteria
Dielectrics and electrical insulation
Dynamic models
Electric fields
Electric potential
Electric resistance
Finite element analysis
Finite element method
Finite element methods
Flashover
Insulators
Mathematical models
Pollution
Studies
Surface contamination
Surface resistance
Voltage
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Summary:In this work, a model based on field criterion has been developed to represent the flashover phenomenon, which occurs due to surface pollution on high voltage insulators, under ac voltage. The values of potential and electric field on an insulator surface have been determined using the finite element method (FEM). The open model of the insulator has been used for calculating the resistance in series with the arc, in addition to the values of the leakage current and the arc gradient. As a new approach, this dynamic model uses Lagrange multipliers for the solution of the pollution flashover problem. Both the impedance and the electric field criterion have been used for the propagation of arc on the surface. A computer program called NFDM (new flashover dynamic model) has been developed to achieve this. The results obtained from the program have been compared with theoretical and experimental results of other researchers.
ISSN:1070-9878
1558-4135
DOI:10.1109/TDEI.2004.1324347