Macroscopic conductivity models fit for HVDC cable insulation

Macroscopic conductivity models are the simplest and more common method used for electric field calculation in HVDC cables. Due to the scarcity of parameters of those models in the literature, it becomes necessary to fit the macroscopic models mostly found in the literature to the conductivity measurements of the state-of-the-art HVDC cable insulation. This paper introduces fitting models of the electrical conductivity measurements previously performed on HVDC cable insulation. The models are further modified to best fit the measurements introducing a synergistic relationship between parameters and stresses applied on the cable i.e., electric field and temperature. A comparison among all models found in the literature with their relevant parameters is also carried out.