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Estimation of step and touch voltage at 275/132 kV transmission line due to lightning stroke

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Bibliographic Details
Main Author: Walied, Hassan @ Kamaruddin
Other Authors: Noor Shahida Binti Jamoshid
Format: Learning Object
Language:English
Published: Universiti Malaysia Perlis (UniMAP) 2013
Subjects:
Lightning stroke
Earth
Touch voltage
Ground Potential Rise (GPR)
Online Access:http://dspace.unimap.edu.my/xmlui/handle/123456789/27526
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spelling my.unimap-275262013-08-22T03:21:36Z Estimation of step and touch voltage at 275/132 kV transmission line due to lightning stroke Walied, Hassan @ Kamaruddin Noor Shahida Binti Jamoshid Lightning stroke Earth Touch voltage Ground Potential Rise (GPR) Access is limited to UniMAP community. Electrical transmission tower remains one of the important elements of today’s electrical power system. Transmission tower is designed to support conductors and ground wires of electrical power lines. Transmission line system deliver power from generating plant to the industrial sites and from substation for which distribution system supply to residential for commercial purposed. A significant number of faults in overhead transmission lines are due to lightning strikes which cause back flashovers and hence single or double circuit outage. The continuity and quality of the power supply is therefore can be severely affected by the outages, especially in Malaysia where the isokeraunic level is rather high. In Malaysia, the TNB’s transmission lines consist of 500 kV or 275 kV double circuits, and 275/132 kV quadruple circuits. It is known that the lower portion of the 132 kV line apparently has the lowest lightning performance. The transmission tower foot is modeled as hemisphere electrode impeded in the ground with specific conductivity and permittivity (dielectric constant). The step and touch voltages are estimated for different towers length and different ground parameters. In this project, 275/132 kV quadruple transmission tower model has been used for simulation of step and touch voltages. The step and touch voltages are determine according to the ground resistivity at tower foot of the transmission tower and the transmission tower height. Therefore the varying of permittivity has no effect on both voltages. As the ground resistivity increases, the touch voltage increases. The soil permittivity has no significance effect to ground impedance of tower foot in case of hemisphere presentation. 2013-08-22T03:21:36Z 2013-08-22T03:21:36Z 2011-04 Learning Object http://hdl.handle.net/123456789/27526 en Universiti Malaysia Perlis (UniMAP) School of Electrical System Engineering
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic Lightning stroke
Earth
Touch voltage
Ground Potential Rise (GPR)
spellingShingle Lightning stroke
Earth
Touch voltage
Ground Potential Rise (GPR)
Walied, Hassan @ Kamaruddin
Estimation of step and touch voltage at 275/132 kV transmission line due to lightning stroke
description Access is limited to UniMAP community.
author2 Noor Shahida Binti Jamoshid
author_facet Noor Shahida Binti Jamoshid
Walied, Hassan @ Kamaruddin
format Learning Object
author Walied, Hassan @ Kamaruddin
author_sort Walied, Hassan @ Kamaruddin
title Estimation of step and touch voltage at 275/132 kV transmission line due to lightning stroke
title_short Estimation of step and touch voltage at 275/132 kV transmission line due to lightning stroke
title_full Estimation of step and touch voltage at 275/132 kV transmission line due to lightning stroke
title_fullStr Estimation of step and touch voltage at 275/132 kV transmission line due to lightning stroke
title_full_unstemmed Estimation of step and touch voltage at 275/132 kV transmission line due to lightning stroke
title_sort estimation of step and touch voltage at 275/132 kv transmission line due to lightning stroke
publisher Universiti Malaysia Perlis (UniMAP)
publishDate 2013
url http://dspace.unimap.edu.my/xmlui/handle/123456789/27526
_version_ 1643795378079793152
score 13.22586

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