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Impact of lightning on tower footing design of 500 kV transmission line

This study evaluates several tower earthing designs for improving 500 kV transmission line’s lightning performance and ensure its continuous operation. The study includes the assessment of the soil profile and a comparison of the findings obtained using the default and new earthing arrangement, both...

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Main Authors:	Mohd Nasir, N. A. F., Mohd Nasir, M. S., Abd Rahman, Muhamad Safwan, Ab-Kadir, M. Z. A., Azis, N., Osman, M., Ungku Amirulddin, Ungku Anisa
Format:	Conference or Workshop Item
Published:	IEEE 2023
Online Access:	http://psasir.upm.edu.my/id/eprint/37350/ https://ieeexplore.ieee.org/document/10181321
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id	my.upm.eprints.37350
record_format	eprints
spelling	my.upm.eprints.373502023-09-11T06:23:22Z http://psasir.upm.edu.my/id/eprint/37350/ Impact of lightning on tower footing design of 500 kV transmission line Mohd Nasir, N. A. F. Mohd Nasir, M. S. Abd Rahman, Muhamad Safwan Ab-Kadir, M. Z. A. Azis, N. Osman, M. Ungku Amirulddin, Ungku Anisa This study evaluates several tower earthing designs for improving 500 kV transmission line’s lightning performance and ensure its continuous operation. The study includes the assessment of the soil profile and a comparison of the findings obtained using the default and new earthing arrangement, both of which are intended to improve the tower footing resistance (TFR-during steady-state) and tower footing impedance (TFI-during lightning). Assessment of the TFR and TFI has been performed before and after the earthing design improvement. In addition, the impacts of these TFR and TFI, which are also defined as low and high-frequency earthing, respectively, relying on a specification of TFR and soil resistivity (SR) ranges at different locations have also been taken into consideration. The study was performed with the help of the SESCAD tool of Current Distribution Electromagnetic Field Grounding and Soil Structure Analysis program (CDEGS), as well as the PSCAD/EMTDC software, which was used for low and high frequency earthing, accordingly. Upon the completion of the investigation, the findings revealed that the modification to the earthing arrangement had a beneficial effect on lowering the TFR by 84.29 % and 88.34 % for Towers T41 and T42, respectively. While for TFI, the results revealed a significant decrease below the TFR during high frequency operation, which was attributed to soil ionization process that occur due to lightning. This was proved by the fact that the values were significantly below the TFR. All these enhancements are now being explored and evaluated across all of Malaysia’s 500 kV networks, where lightning is regarded to be the primary risk factor for power outages. IEEE 2023 Conference or Workshop Item PeerReviewed Mohd Nasir, N. A. F. and Mohd Nasir, M. S. and Abd Rahman, Muhamad Safwan and Ab-Kadir, M. Z. A. and Azis, N. and Osman, M. and Ungku Amirulddin, Ungku Anisa (2023) Impact of lightning on tower footing design of 500 kV transmission line. In: 12th Asia-Pacific International Conference on Lightning (APL 2023), 12-15 June 2023, Langkawi, Malaysia. . https://ieeexplore.ieee.org/document/10181321 10.1109/APL57308.2023.10181321
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/
description	This study evaluates several tower earthing designs for improving 500 kV transmission line’s lightning performance and ensure its continuous operation. The study includes the assessment of the soil profile and a comparison of the findings obtained using the default and new earthing arrangement, both of which are intended to improve the tower footing resistance (TFR-during steady-state) and tower footing impedance (TFI-during lightning). Assessment of the TFR and TFI has been performed before and after the earthing design improvement. In addition, the impacts of these TFR and TFI, which are also defined as low and high-frequency earthing, respectively, relying on a specification of TFR and soil resistivity (SR) ranges at different locations have also been taken into consideration. The study was performed with the help of the SESCAD tool of Current Distribution Electromagnetic Field Grounding and Soil Structure Analysis program (CDEGS), as well as the PSCAD/EMTDC software, which was used for low and high frequency earthing, accordingly. Upon the completion of the investigation, the findings revealed that the modification to the earthing arrangement had a beneficial effect on lowering the TFR by 84.29 % and 88.34 % for Towers T41 and T42, respectively. While for TFI, the results revealed a significant decrease below the TFR during high frequency operation, which was attributed to soil ionization process that occur due to lightning. This was proved by the fact that the values were significantly below the TFR. All these enhancements are now being explored and evaluated across all of Malaysia’s 500 kV networks, where lightning is regarded to be the primary risk factor for power outages.
format	Conference or Workshop Item
author	Mohd Nasir, N. A. F. Mohd Nasir, M. S. Abd Rahman, Muhamad Safwan Ab-Kadir, M. Z. A. Azis, N. Osman, M. Ungku Amirulddin, Ungku Anisa
spellingShingle	Mohd Nasir, N. A. F. Mohd Nasir, M. S. Abd Rahman, Muhamad Safwan Ab-Kadir, M. Z. A. Azis, N. Osman, M. Ungku Amirulddin, Ungku Anisa Impact of lightning on tower footing design of 500 kV transmission line
author_facet	Mohd Nasir, N. A. F. Mohd Nasir, M. S. Abd Rahman, Muhamad Safwan Ab-Kadir, M. Z. A. Azis, N. Osman, M. Ungku Amirulddin, Ungku Anisa
author_sort	Mohd Nasir, N. A. F.
title	Impact of lightning on tower footing design of 500 kV transmission line
title_short	Impact of lightning on tower footing design of 500 kV transmission line
title_full	Impact of lightning on tower footing design of 500 kV transmission line
title_fullStr	Impact of lightning on tower footing design of 500 kV transmission line
title_full_unstemmed	Impact of lightning on tower footing design of 500 kV transmission line
title_sort	impact of lightning on tower footing design of 500 kv transmission line
publisher	IEEE
publishDate	2023
url	http://psasir.upm.edu.my/id/eprint/37350/ https://ieeexplore.ieee.org/document/10181321
_version_	1778163708710617088
score	13.211869

Impact of lightning on tower footing design of 500 kV transmission line

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