Poles calculated from branch parameters of insulation model, on the
other hand are independent of insulation geometry. However such technique requires
accurate modeling of dielectric response function. Conventional Debye model does not
consider the effect of temperature gradient that exists across the length of the insulation
during its operation. In the present paper it is shown that for more accurate modeling
and better understanding of dielectric response of oil-paper insulation, a new model
which considers the effect of temperature gradient on insulation properties, is
necessary