Electrical-Thermal-Mechanical Simulation of Thermoplastic Polypropylene Cables
The present work made a preliminary attempt to conduct electrical-thermal-mechanical modeling of a 35 kV three-core polypropylene power cable using COMSOL Multiphysics software.It simulated and analyzed the distribution characteristics of electric and temperature fields in the insulating layer under normal,overload,and light-load conditions,as well as the bending deformation pattern of the insulating layer.The results showed that,compared with light load oper-ation,the current at conductive core increased under heavy load condition,resulting in the increment of electric field strength at the polypropylene insulation by a maximum of 1.16 times,and the insulation layer temperature rise of 85.5℃.When the cable installation bending radius was 8D,the deformation of the polypropylene insulation exceeded the maxi-mum withstand deformation value,thereby possibly causing insulation cracking.
polypropylene cablecarrying capacityelectric field distributiontemperature field distributiondeformation