Table of Contents
ISRN Power Engineering
Volume 2013 (2013), Article ID 874647, 8 pages
http://dx.doi.org/10.1155/2013/874647
Research Article

On the Transient Response and the Frequency Analysis of Transmission Line Towers

Electrical Engineering Department, College of Engineering and Petroleum, Kuwait University, P.O. Box 5959, Code 13060, Kuwait City, Kuwait

Received 26 February 2013; Accepted 24 March 2013

Academic Editors: A. Cardou and J. J. González de la Rosa

Copyright © 2013 Mohamed M. Saied. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper proposes an approach to the study of the transient response and the frequency characteristics of power lines' towers, when subjected to lightening strikes. It starts with dividing the nonuniform line representing the tower into a number of sections. From the usually known dependence of the tower's characteristic impedance on the vertical coordinate and the application of a recursive circuit reduction technique, an s-domain expression for the tower input impedance can be obtained. This expression, followed by the numerical Laplace inversion, is utilized for the determination of the tower's transient response. The impedance expression can be also used to determine the tower's resonance frequencies. This was used to demonstrate some potentially critical situations in which the tower is hit by lightning strikes comprising multiple current pulses. The validity of the proposed technique is demonstrated by comparing the achieved results with those already available in the literature for the same case studies.