Title :
Modeling of Discharges Propagating over Non-Uniformly Polluted Insulators under Impulse Voltages
Author :
Beroual, A. ; Diampeni, S.
Author_Institution :
AMPERE, Ecole Centrale de Lyon, Ecully
Abstract :
This paper deals with the prediction of the characteristics of the whole discharge (length, current, arc resistance, instantaneous propagation velocity, charge injection, radius of the discharge and the voltage at the head of the discharge channel and the voltage drop within it) propagating over non-uniformly polluted insulators under impulse voltages using a dynamic model. This model uses an equivalent electrical network and an analytical impedance criterion. It takes into account the instantaneous changes of the discharge parameters. Simulation results for two bi-exponential waves are presented: 1.2/50 mus and 10/800 mus.
Keywords :
insulator contamination; partial discharges; arc resistance; bi-exponential waves; charge injection; discharge characteristic prediction; discharge propagation; dynamic model; equivalent electrical network; impedance criterion; impulse voltages; instantaneous propagation velocity; non-uniform polluted insulators; Conductivity; Dielectrics and electrical insulation; Flashover; Foot; Predictive models; Surface cleaning; Surface contamination; Surface discharges; Thermal pollution; Voltage;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2008. CEIDP 2008. Annual Report Conference on
Conference_Location :
Quebec, QC
Print_ISBN :
978-1-4244-2548-8
Electronic_ISBN :
978-1-4244-2549-5
DOI :
10.1109/CEIDP.2008.4772801
