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Tower earthing design and impedance assessment under high frequency lightning transient condition

TK3226.A34 2015

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Bibliographic Details
Main Author: Adibah Attirah Yusof
Format: text::Final Year Project
Language:English
Published: 2024
Subjects:
Electric lines
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spelling my.uniten.dspace-337412024-10-13T02:04:12Z Tower earthing design and impedance assessment under high frequency lightning transient condition Adibah Attirah Yusof Electric lines TK3226.A34 2015 Lightning density in Malaysia is reported one of the highest in the Asean region and it becomes a major factor of outages in TNB Transmission. When lightning strikes transmission tower, large currents with high frequency generated by the stroke flow in the above ground structures and grounding system, and dissipate into the soil. Since lightning is a natural phenomena and cannot be prevented, it is necessary to have a proper design of earthing in order to dissipate currents into the soil effectively. This thesis analyzes the details about high frequency transient condition due to lightning and also design the grounding grid of the transmission tower under these condition. Apart from that, the effect of soil ionization, electric field and magnetic field and also being analysed by using CDEGS software. A high resistivity layer with underlying low resistivity soil, earthing design that includes more vertical rod combined with counterpoise should be chosen. Conversely, a design using long counterpoise would be selected where the soil structure has low resistivity at the upper layer. Analysis verified that the magnitude of electric field dependent on the frequency. Results of electric field also illustrate that the electric field which initiating the ionization decreased whenever the soil resistivity decreased. Meanwhile, the magnetic field is not sensitive to the frequency for all cases for a constant current injection. 2024-10-07T06:08:55Z 2024-10-07T06:08:55Z 2015 Resource Types::text::Final Year Project https://irepository.uniten.edu.my/handle/123456789/33741 en application/pdf
institution Universiti Tenaga Nasional
building UNITEN Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tenaga Nasional
content_source UNITEN Institutional Repository
url_provider http://dspace.uniten.edu.my/
language English
topic Electric lines
spellingShingle Electric lines
Adibah Attirah Yusof
Tower earthing design and impedance assessment under high frequency lightning transient condition
description TK3226.A34 2015
format Resource Types::text::Final Year Project
author Adibah Attirah Yusof
author_facet Adibah Attirah Yusof
author_sort Adibah Attirah Yusof
title Tower earthing design and impedance assessment under high frequency lightning transient condition
title_short Tower earthing design and impedance assessment under high frequency lightning transient condition
title_full Tower earthing design and impedance assessment under high frequency lightning transient condition
title_fullStr Tower earthing design and impedance assessment under high frequency lightning transient condition
title_full_unstemmed Tower earthing design and impedance assessment under high frequency lightning transient condition
title_sort tower earthing design and impedance assessment under high frequency lightning transient condition
publishDate 2024
_version_ 1814061150389665792
score 13.214268

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