STM Journals Peer-reviewed research from Consortium e-Learning Network

Journal of Power Electronics and Power Systems

Frequency Characteristics and Transient Response of Transmission Lines with Longitudinally Varying Ambient Temperature

  1. Mohamed Mostafa Saied

Abstract

This paper addresses the steady state, the frequency characteristics and the transient response ofpower lines in the presence of longitudinally varying ambient temperature. This variation willlead to location-dependent line circuit parameters and to a changing equivalent circuit. Thederived models, which are based on the exact long line theory, can incorporate the impact of thedifferent patterns of the temperature distribution in terms of location and magnitude. Severalcase studies of the resulting non-uniform lines are investigated. The results include the steadystateresponse at any frequency, the transient voltage and current distributions and the line’sinput impedance under various loading conditions.Keywords: Ambient temperature, distributed parameter circuits, frequency characteristics, linemodeling, non-uniform lines, power transmission lines, steady state, transients
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