This paper presents the theoretical and
experimental study of the negative corona inception voltage of
the ionized conductor on the three electrode system in air. The
proposed three-electrode system modifies the usual twoelectrode system implemented in the filtration process by
entering a supplementary cylinder free to move in x-y
directions. The three-electrode system is constructed to
regulate the field distribution on the surface of the ionized
conductor and on the ground plate besides changing the corona
inception voltage. The negative corona inception voltage is
determined according to the principle developed for the
forming of the recurrence of negative corona current pulses in
the near vicinity of the stressed conductor. The computation of
the free space charge field is determined using the charge
simulation technique with the aid of the genetic algorithms.
The obtained field values are harnessed in the negative corona
inception voltage computation of the ionized conductor.
Experimental measurements of the negative corona inception
voltage of the ionized wire are carried out. The effect of
moving the supplementary cylinder in both directions on the
inception voltage is determined theoretically and
experimentally. The results showed the effectiveness of the
supplementary cylinder on controlling the inception voltage
level upon the ionized conductor. The calculated inception
voltage coincided in an acceptable way with those measured in
the laboratory.