Electric field profiles and right-of-way widths as influenced by grounded shield wires underneath EHV direct current transmission Lines

Document Type : Original Article

Authors

1 Electrical and Computer Engineering Department, Higher Technological Institute (HTI), 10th of Ramadan City, EGYPT.

2 Electrical Power and Machines Department, Faculty of Engineering, Zagazig University, Zagazig, EGYPT.

3 Electrical Engineering Department, Faculty of Engineering., Assuit University, Assuit, EGYPT.

Abstract

Abstract:
This paper is aimed at reducing the electric fields underneath extra high voltage direct
current transmission lines using grounded shield wires. Two extra high voltage direct
current transmission lines are modeled and analyzed. One line is homopolar and the
other is bipolar, both are operating at 400 kV. The electric field calculated at the ground
level for the two transmission lines with and without grounded shield wires. In addition,
the right-of-way limits for those transmission lines according to the maximum allowable
electric field strength are calculated. The charge simulation method is used for
calculating electric fields underneath the lines with and without grounded shield wires.

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