Comparison between duval triangle and duval pentagon method for dissolved gas analysis of power transformer

Power transformers are the highest value of the equipment installed in high-voltage substations, comprising up to 60% of total investment. There is a need for economic and financial reports to be provided to make asset decisions and ensuring balance between investment, maintenance costs and operatio...

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Main Author:	Ibrahim, Sharal Aida
Format:	Thesis
Language:	English
Published:	2018
Subjects:	TK Electrical engineering Electronics Nuclear engineering
Online Access:	http://eprints.utm.my/id/eprint/86988/1/SharalAidaIbrahimMSKE2018.pdf
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id	my-utm-ep.86988
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spelling	my-utm-ep.869882020-10-31T12:16:33Z Comparison between duval triangle and duval pentagon method for dissolved gas analysis of power transformer 2018 Ibrahim, Sharal Aida TK Electrical engineering. Electronics Nuclear engineering Power transformers are the highest value of the equipment installed in high-voltage substations, comprising up to 60% of total investment. There is a need for economic and financial reports to be provided to make asset decisions and ensuring balance between investment, maintenance costs and operational performance. Health index (HI) is the most common approach used in determining the condition of the transformers. It is a tool that process information by creating a score that describe the condition of an asset. A comparative analysis is made between HI calculation models that allow the evaluation of the condition of a power transformer. Through this index it is possible to objectively determine the condition of power transformers to make maintenance or reinvestment decisions. Thus, it is possible to detect possible risk assets preventing them from failing, allowing an increase in the life time. Several studies have examined different power transformer condition assessment and life management techniques. These techniques include measuring or monitoring of dissolved gas analysis (DGA) using Duval Triangle method. DGA technique is a reliable method and widely used to detect incipient faults which may occur in transformers such as partial discharge, thermal fault and electrical fault. This paper will focus on DGA using Duval Triangle & Pentagon method. The objective of this paper is to compare and identify between Duval Triangle and Duval Pentagon methods which may provide more accurate interpretation of DGA test result. This comparative study is based on real data provided by Malaysia utility company. The analysis using Duval Pentagon method give the accurate fault analysis and exactly same as the interpretation given by IEC 60599 Standard. An accurate fault analysis using Duval Pentagon Method give a better output of life time prediction, types of possible faults and recommendations for future maintenance action can be achieved. 2018 Thesis http://eprints.utm.my/id/eprint/86988/ http://eprints.utm.my/id/eprint/86988/1/SharalAidaIbrahimMSKE2018.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:132666 masters Universiti Teknologi Malaysia, Faculty of Engineering - School of Electrical Engineering Faculty of Engineering - School of Electrical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TK Electrical engineering Electronics Nuclear engineering
spellingShingle	TK Electrical engineering Electronics Nuclear engineering Ibrahim, Sharal Aida Comparison between duval triangle and duval pentagon method for dissolved gas analysis of power transformer
description	Power transformers are the highest value of the equipment installed in high-voltage substations, comprising up to 60% of total investment. There is a need for economic and financial reports to be provided to make asset decisions and ensuring balance between investment, maintenance costs and operational performance. Health index (HI) is the most common approach used in determining the condition of the transformers. It is a tool that process information by creating a score that describe the condition of an asset. A comparative analysis is made between HI calculation models that allow the evaluation of the condition of a power transformer. Through this index it is possible to objectively determine the condition of power transformers to make maintenance or reinvestment decisions. Thus, it is possible to detect possible risk assets preventing them from failing, allowing an increase in the life time. Several studies have examined different power transformer condition assessment and life management techniques. These techniques include measuring or monitoring of dissolved gas analysis (DGA) using Duval Triangle method. DGA technique is a reliable method and widely used to detect incipient faults which may occur in transformers such as partial discharge, thermal fault and electrical fault. This paper will focus on DGA using Duval Triangle & Pentagon method. The objective of this paper is to compare and identify between Duval Triangle and Duval Pentagon methods which may provide more accurate interpretation of DGA test result. This comparative study is based on real data provided by Malaysia utility company. The analysis using Duval Pentagon method give the accurate fault analysis and exactly same as the interpretation given by IEC 60599 Standard. An accurate fault analysis using Duval Pentagon Method give a better output of life time prediction, types of possible faults and recommendations for future maintenance action can be achieved.
format	Thesis
qualification_level	Master's degree
author	Ibrahim, Sharal Aida
author_facet	Ibrahim, Sharal Aida
author_sort	Ibrahim, Sharal Aida
title	Comparison between duval triangle and duval pentagon method for dissolved gas analysis of power transformer
title_short	Comparison between duval triangle and duval pentagon method for dissolved gas analysis of power transformer
title_full	Comparison between duval triangle and duval pentagon method for dissolved gas analysis of power transformer
title_fullStr	Comparison between duval triangle and duval pentagon method for dissolved gas analysis of power transformer
title_full_unstemmed	Comparison between duval triangle and duval pentagon method for dissolved gas analysis of power transformer
title_sort	comparison between duval triangle and duval pentagon method for dissolved gas analysis of power transformer
granting_institution	Universiti Teknologi Malaysia, Faculty of Engineering - School of Electrical Engineering
granting_department	Faculty of Engineering - School of Electrical Engineering
publishDate	2018
url	http://eprints.utm.my/id/eprint/86988/1/SharalAidaIbrahimMSKE2018.pdf
_version_	1747818518847422464

Comparison between duval triangle and duval pentagon method for dissolved gas analysis of power transformer

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