Approximate Method for Calculating Impedance of Multiconductor with Arbitrary Cross-Section

Abstract

This paper proposes an approximate impedance formula of a conductor with an arbitrary cross-section, and also a method of approximating the conductor by an equivalent circular conductor. Thus, a multiconductor system consisting of arbitrary cross-section conductors is reprenented by circular cross-section conductors of which the impedance and admittance are evaluated by the existing impedance and admittance formulas.
The calculated results by the proposed method agree satisfactorily with measured results and numerical results by a finite element method which is, at the present, only the way of calculating such the impedance, but requires a large computation time and memories. The proposed method might be very useful to evaluate the impedance and admittance of a multiconductor system consisting of arbitrary cross-section conductors.