Temperature Field Simulations of Three-Layer Extrusion in 110 kV Grafted Polypropylene Power Cables

The three-layers extrusion was used in grafted polypropylene (PP) cables producing, and there occurred a color difference in insulating layer due to the temperature characteristics of materials and big section. In this paper, the temperature field simulation of three-layer extrusion was studied in 110 kV grafted PP power cables. Firstly, the thermal conductivity of insulating and shielding materials were tested. Then, the COMSOL Multiphysics was used to calculated the temperature field distribution by importing the measured data. Finally, the simulation results were obtained and analyzed. The conclusion is that the conductor temperature has a great influence on the temperature field distribution, while the atmosphere temperature on the temperature field distribution. It will guide the production and manufacturing of grafted PP insulated power cables in 110 kV and higher voltage levels in the future.