Cable Insulation Aging Simulation

This paper proposes a modeling method for reflectometry response of natural aged cable insulation. In the proposed modeling, a finite element method (FEM) is used to simulate the electromagnetic field of cable sections with different degrees of insulation aging. From the model, the S-parameters of cable sections are extracted. A series of equivalent circuit models of cable sections are then built based on the S-parameters to test the reflectometry response of different aging conditions. The reflectometry response signals are analyzed to build a cable insulation degradation model. The results of model are verified with the experiment data to demonstrate the effectiveness of the proposed modeling method.