Abstract:
Recently, in medium voltage distribution systems,
overhead conductors are replaced by insulation covered
conductors owing to their profound advantages. The insulated
overhead conductor shares a boundary between the dielectric
insulation used and the air insulation. Because of the higher
insulation resistance of the air when compared with any
polymeric insulation, most of the voltage drop will be on the
dielectric-air interface (i.e. on the surface of the dielectric). The
main goal of this work is to investigate the surface potential of
the XLPE covered conductor accurately at different positions
using a lab designed voltage divider under applied alternating
voltages. Furthermore, 2D simulations have been done to
estimate the surface potential of an insulation covered
conductor. Interesting results on the surface voltage with
applied voltages and different positions in the insulation are
presented.
