Frequency dependent coupled field-circuit modeling of armored power cables using finite elements

This paper proposes a frequency dependent model for armored power cables using FE method. The model parameters are obtained by conducting a series of studies using coupled circuit-field analysis. The frequency response of the cable was obtained by coupling the cable FE domain model and external electric circuits. This frequency response was then fitted with rational function approximation. The resulting vector fittings (VF) rational function was then represented by an equivalent electrical network. This model represents the cable high frequency dynamic behavior to account for overvoltages or current spikes.