Modelling of the AC Breakdown Voltage of Point-Plane Air Gaps with Insulating Barrier
Abstract
High voltage device dimensioning requires the prediction of the withstand
voltage for test conditions like impulses, surges and AC voltage. There is a
large need of designer to have reliable design criteria and well-defined
simulation procedure for device development. This parametric study is based
on the methodology of experimental designs. This method allowed us to
propose a mathematical polynomial model. The objective of this paper is to
study the discharge phenomena for a point–plane air interval with insulating
barrier between them. Firstly on experimental study of a laboratory setup that
we designed to carry out the influence of parameters (geometrical) involved
in the process of breakdown. The distance between electrodes and different
parameters of the barrier such as its position between electrodes dimension
and its holes is studied. The barrier acts as a geometrical obstacle against the
direct propagation of discharge. Secondly, using results obtained by the
experimental setup, we have experiments design methodology of technique
to predict the breakdown threshold voltage.