Computation of electric fields around parallel HV and EHV overhead transmission lines in Egyptian power network

The aim of this paper is to compute the electric fields of parallel high and extra high voltage transmission lines in Egyptian power network. Three parallel high and extra high voltage transmission lines are analysed and simulated. The first two lines are the same configurations with voltage of 220 kV, double circuit, two bundles. The third line is a flat configuration, 500 kV, three bundles, and single circuit. The charge simulation technique (CST) is used to calculate the electric field at ground level for these lines. The maximum electric field of the three lines is affected by modifying the phase sequence for each line and the spacings between them. The effect of changing the lines phase sequence on the spatial distribution of the electric field is also studied. The effect of taking one on sub-circuit or line of is out of service is also studied.