Effects of Earth Resistivity on Modal Parameters of an EHV Horizontal Line at PLC Frequencies

1 November 1973

journal article
Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Power Apparatus and Systems

Vol. PAS-92 (6) , 2044-2052
https://doi.org/10.1109/tpas.1973.293733

Abstract

A brief comparison of the salient aspects of modal analyses of lossless and lossy lines is described. Simplified equations for modal parameters of a three-phase horizontal line are demonstrated. Effects of earth resistivity, Pe, on the modal attenuations and velocities of propagation on a 500-kV line are discussed for P_e from 20 Ωm to 2000 Ωm at three frequencies, F: 50kHz, 100kHz and 200kHz. Modal voltage components, general and modal reflection-free line terminations are derived and compared with those for the lossless line. It is found that angles of all modal complex parameters and of line terminations are small.

Keywords

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