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Optimised transmission tower earthing: experience in design and operation

A large percentage of transmission line outages in Malaysia are due to lightning activity with backflashover being the main cause. Previous investigations have indicated that tower footing earth resistance is one of the main factors in reducing the occurrence of backflashovers. The present studies r...

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Main Authors:	Abd Rahman, Nurul Azlina, Ahmad Marican, Aziz Marzuki, Ab Kadir, Mohd Zainal Abidin
Format:	Conference or Workshop Item
Language:	English
Published:	IEEE 2014
Online Access:	http://psasir.upm.edu.my/id/eprint/55678/1/Optimised%20transmission%20tower%20earthing%20experience%20in%20design%20and%20operation.pdf http://psasir.upm.edu.my/id/eprint/55678/
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id	my.upm.eprints.55678
record_format	eprints
spelling	my.upm.eprints.556782017-06-07T08:34:22Z http://psasir.upm.edu.my/id/eprint/55678/ Optimised transmission tower earthing: experience in design and operation Abd Rahman, Nurul Azlina Ahmad Marican, Aziz Marzuki Ab Kadir, Mohd Zainal Abidin A large percentage of transmission line outages in Malaysia are due to lightning activity with backflashover being the main cause. Previous investigations have indicated that tower footing earth resistance is one of the main factors in reducing the occurrence of backflashovers. The present studies review some of the tower earthing design options. From this standard designs are proposed together with a practical method of optimising the design based on soil resistivity measurement data. The process is presented via a flowchart which includes the main measurement and design steps. This allows different standard designs to be selected to suit the type of soil structure at the site of the proposed transmission tower. Where measurements indicate a high resistivity layer with underlying low resistivity soil, an electrode design relying more on driven rods is used. Conversely, a design using more horizontal electrode would be selected where the soil structure is of low resistivity above high. Some practical methods are also described which can be included in the design to improve the ease with which maintenance testing can be carried out. The results of trial installations on selected towers have been performed and the results are discussed. IEEE 2014 Conference or Workshop Item PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/55678/1/Optimised%20transmission%20tower%20earthing%20experience%20in%20design%20and%20operation.pdf Abd Rahman, Nurul Azlina and Ahmad Marican, Aziz Marzuki and Ab Kadir, Mohd Zainal Abidin (2014) Optimised transmission tower earthing: experience in design and operation. In: 2014 International Conference on Lightning Protection (ICLP), 11-18 Oct. 2014, Shanghai, China. (pp. 1600-1603). 10.1109/ICLP.2014.6973385
institution	Universiti Putra Malaysia
building	UPM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Putra Malaysia
content_source	UPM Institutional Repository
url_provider	http://psasir.upm.edu.my/
language	English
description	A large percentage of transmission line outages in Malaysia are due to lightning activity with backflashover being the main cause. Previous investigations have indicated that tower footing earth resistance is one of the main factors in reducing the occurrence of backflashovers. The present studies review some of the tower earthing design options. From this standard designs are proposed together with a practical method of optimising the design based on soil resistivity measurement data. The process is presented via a flowchart which includes the main measurement and design steps. This allows different standard designs to be selected to suit the type of soil structure at the site of the proposed transmission tower. Where measurements indicate a high resistivity layer with underlying low resistivity soil, an electrode design relying more on driven rods is used. Conversely, a design using more horizontal electrode would be selected where the soil structure is of low resistivity above high. Some practical methods are also described which can be included in the design to improve the ease with which maintenance testing can be carried out. The results of trial installations on selected towers have been performed and the results are discussed.
format	Conference or Workshop Item
author	Abd Rahman, Nurul Azlina Ahmad Marican, Aziz Marzuki Ab Kadir, Mohd Zainal Abidin
spellingShingle	Abd Rahman, Nurul Azlina Ahmad Marican, Aziz Marzuki Ab Kadir, Mohd Zainal Abidin Optimised transmission tower earthing: experience in design and operation
author_facet	Abd Rahman, Nurul Azlina Ahmad Marican, Aziz Marzuki Ab Kadir, Mohd Zainal Abidin
author_sort	Abd Rahman, Nurul Azlina
title	Optimised transmission tower earthing: experience in design and operation
title_short	Optimised transmission tower earthing: experience in design and operation
title_full	Optimised transmission tower earthing: experience in design and operation
title_fullStr	Optimised transmission tower earthing: experience in design and operation
title_full_unstemmed	Optimised transmission tower earthing: experience in design and operation
title_sort	optimised transmission tower earthing: experience in design and operation
publisher	IEEE
publishDate	2014
url	http://psasir.upm.edu.my/id/eprint/55678/1/Optimised%20transmission%20tower%20earthing%20experience%20in%20design%20and%20operation.pdf http://psasir.upm.edu.my/id/eprint/55678/
_version_	1643835965386522624
score	13.211869

Optimised transmission tower earthing: experience in design and operation

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