Abstract:
This paper studies the use of circular and square
shaped solid insulators on creeping discharge propagation over
solid/liquid dielectric interfaces under AC voltages. A point-plane
electrode arrangement based test apparatus is used to initiate
creeping discharges over solid/liquid interfaces and the discharge
propagation is captured using a camera. Two shapes of solid
material samples are used to analyze the effect of using different
shaped dielectric samples for the creeping propagation under AC
voltages. Two types of solid materials, glass and acrylic, immersed
in copra coconut oil are tested. Discharge length of the discharge
patterns and the fractal dimension calculated by box counting
method are used to explain the effect of square shaped and
circular shaped dielectric samples for the morphology of creeping
discharges. Results show that the shape of the solid dielectric
material does not have a significant effect on the discharge length,
fractal dimension and the shape of the discharge pattern.
