Modelisation dynamique du coniournement des isolateurs pollues des lignes aeriennes en haute tension

الملخص EN

The objective of this work is the study of the phenomenon of pollution of the insulators which represents one of the principal causes of the damages on the transport of the electric power.

This phenomenon was modelled using a dynamic model.

The influence of the level of the contamination and the geometrical form on the distribution of the potentials in the vicinity of the insulator and on the propagation of the electric discharge are studied.

The geometrical parameters are used to describe the influence of the profile of the.

insulator on the voltage of flashover.

The dynamic model suggested is based on the concept of Obenaus.

This model at every moment takes account of the profile of the insulator in the elongation of the discharge on the surface of the insulator.

The configuration of the insulator plays a significant role in the process of flashover of the polluted insulators.

The computation results are compared with experimental data.

The agreement in the results suggests that information which can be obtained using this model is very useful in the dimensioning of the insulators for the polluted areas.