Abstract
Cable parameters are used to establish models of cables for transient and steady-state analysis. Finite element methods (FEM) can calculate such parameters accurately but are time consuming and demanding, thus not always suitable in an engineering process. In contrast, classical analytical equations for parameter calculations are simple and fast but do not properly take proximity effects into account. This is particularly important in cables with common screens but also in complicated umbilical cables and pipe cases. This paper briefly reviews the MoM-SO method for series impedance and shunt admittance. This is then applied as extensions to classical pipe-type cable parameters procedures. Two cases demonstrate the accuracy of the proposed method when compared to FEM analysis. A simple three-core cable case shows very good agreement, while a special pipe-in-pipe geometry reveals some challenges. The required order of the method increases with the radius ratio of the conductors involved. A final simulation case shows that analytical methods for pipe-type cables underestimates damping but have little effect on the wave velocity.