Ineffectiveness of transmission line transpositions at harmonic frequencies

Abstract

There is practically no information on the behaviour of transmission line transpositions at harmonic frequencies. The paper describes a computer model for the calculation of the phase voltages appearing at the end of a multiconductor transmission line. The program can model the effect of transpositions under harmonic voltage or current excitation and variable loading. The effectiveness of the transpositions is shown to deteriorate substantially with increasing frequencies for electrical distances above one-eighth of their respective wavelengths and when the power transmitted is below the natural loading of the line.