Modelling Surface Electric Discharge Propagation on Polluted Insulators under AC Voltage

In this contribution, a mathematical model allowing for the prediction of the AC surface arc propagation on polluted insulators under non-uniform electric field is proposed. The approach is based on the experimental concept of Claverie and Porcheron. The proposed model, which makes it possible to re...

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Bibliographic Details
Published in:Energies (Basel) 2021-10, Vol.14 (20), p.6653
Main Authors: Amrani, Mohamed Lamine, Bouazabia, Slimane, Fofana, Issouf, Meghnefi, Fethi, Jabbari, Marouane, Khelil, Djazia, Boudiaf, Amina
Format: Article
Language:English
Subjects:
arc propagation
Electric arcs
Electric discharges
Electric fields
Electrodes
finite element method (FEM)
flashover
inception voltage
Insulators
Laboratories
Mathematical models
Pollution
Propagation
Voltage
Voltage drop
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Summary:In this contribution, a mathematical model allowing for the prediction of the AC surface arc propagation on polluted insulators under non-uniform electric field is proposed. The approach is based on the experimental concept of Claverie and Porcheron. The proposed model, which makes it possible to reproduce the surface electric discharge, includes a condition for arrest of the propagating discharge. The electric field at the tip of the discharge is the key parameter governing its random propagation. A finite element approach allows for mapping of the electric field distribution while the discharge propagation process is simulated in two dimensions. The voltage drop along the arc discharge path at each propagation step is also taken into account. The simulation results are validated against experimental data, taking into account several electro-geometric parameters (distance between electrodes, pollution conductivity, radius of high-voltage electrode, length of the plane electrode). Good agreement between computed and experimental results were obtained for various test configurations.
ISSN:1996-1073
1996-1073
DOI:10.3390/en14206653