Electrical and chemical properties of thermally aged vegetable-based oils as high voltage insulating material

Researches on the viability of using vegetable-based or plant-based oils in power transformers are gaining much attention due to their excellent biodegradability and good dielectric properties. Several vegetable-based oils have been studied and found to have potentials to be used as transformer insu...

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Main Author:	Ahmad Kamal, Muhammad Safwan
Format:	Thesis
Language:	English
Published:	2015
Subjects:	TK Electrical engineering Electronics Nuclear engineering
Online Access:	http://eprints.utm.my/id/eprint/53847/1/MuhammadSafwanMFKE2015.pdf
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spelling	my-utm-ep.538472020-09-07T03:14:12Z Electrical and chemical properties of thermally aged vegetable-based oils as high voltage insulating material 2015-06 Ahmad Kamal, Muhammad Safwan TK Electrical engineering. Electronics Nuclear engineering Researches on the viability of using vegetable-based or plant-based oils in power transformers are gaining much attention due to their excellent biodegradability and good dielectric properties. Several vegetable-based oils have been studied and found to have potentials to be used as transformer insulating oil. However, studies on their long-term ageing properties and improvement on their dielectric properties are still lacking. This thesis reports laboratory studies carried out on eight different vegetable oils and their blends to investigate their dielectric properties when subjected to accelerate thermal ageing. The vegetable oils are canola oil, coconut oil, olive oil, palm olein oil, sesame oil, CO25 oil (75% canola 25% olive), CO50 oil (50% canola 50% olive) and CO75 oil (25% canola 75% olive). The samples were thermally aged at 150°C for 520 hours and their dielectric properties were investigated. The dielectric properties were fire point, pour point, dielectric dissipation factor (tan d), breakdown voltage, refractive index, kinematic viscosity and Fourier Transform Infrared Spectroscopy (FTIR). Mineral oil was also investigated in the same fashion for comparison purposes. Results from this study show that in overall, mineral oil was the least aged and most stable oil sample after undergoing accelerated thermal ageing. Vegetable oil samples experienced higher degree of ageing and oxidation. However, the vegetable oil samples showed higher breakdown voltage. Among these vegetable oil samples, coconut and sesame oil samples were the most aged and have the lowest breakdown voltage, while olive was the least aged and the most stable. In terms of oxidation stability, sesame and canola experienced the highest oxidation while olive and coconut experienced the least. Furthermore, in this study the blending of the canola and olive oils improves their dielectric properties and oxidation by as much as 37%. The finding in this study thus suggests that vegetable-based oils can have good long-term dielectric properties as insulating oils for high voltage applications. In addition, blending of vegetable oils can also improve their insulating properties and oxidation stability. 2015-06 Thesis http://eprints.utm.my/id/eprint/53847/ http://eprints.utm.my/id/eprint/53847/1/MuhammadSafwanMFKE2015.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:85989 masters Universiti Teknologi Malaysia, Faculty of Electrical Engineering Faculty 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 Ahmad Kamal, Muhammad Safwan Electrical and chemical properties of thermally aged vegetable-based oils as high voltage insulating material
description	Researches on the viability of using vegetable-based or plant-based oils in power transformers are gaining much attention due to their excellent biodegradability and good dielectric properties. Several vegetable-based oils have been studied and found to have potentials to be used as transformer insulating oil. However, studies on their long-term ageing properties and improvement on their dielectric properties are still lacking. This thesis reports laboratory studies carried out on eight different vegetable oils and their blends to investigate their dielectric properties when subjected to accelerate thermal ageing. The vegetable oils are canola oil, coconut oil, olive oil, palm olein oil, sesame oil, CO25 oil (75% canola 25% olive), CO50 oil (50% canola 50% olive) and CO75 oil (25% canola 75% olive). The samples were thermally aged at 150°C for 520 hours and their dielectric properties were investigated. The dielectric properties were fire point, pour point, dielectric dissipation factor (tan d), breakdown voltage, refractive index, kinematic viscosity and Fourier Transform Infrared Spectroscopy (FTIR). Mineral oil was also investigated in the same fashion for comparison purposes. Results from this study show that in overall, mineral oil was the least aged and most stable oil sample after undergoing accelerated thermal ageing. Vegetable oil samples experienced higher degree of ageing and oxidation. However, the vegetable oil samples showed higher breakdown voltage. Among these vegetable oil samples, coconut and sesame oil samples were the most aged and have the lowest breakdown voltage, while olive was the least aged and the most stable. In terms of oxidation stability, sesame and canola experienced the highest oxidation while olive and coconut experienced the least. Furthermore, in this study the blending of the canola and olive oils improves their dielectric properties and oxidation by as much as 37%. The finding in this study thus suggests that vegetable-based oils can have good long-term dielectric properties as insulating oils for high voltage applications. In addition, blending of vegetable oils can also improve their insulating properties and oxidation stability.
format	Thesis
qualification_level	Master's degree
author	Ahmad Kamal, Muhammad Safwan
author_facet	Ahmad Kamal, Muhammad Safwan
author_sort	Ahmad Kamal, Muhammad Safwan
title	Electrical and chemical properties of thermally aged vegetable-based oils as high voltage insulating material
title_short	Electrical and chemical properties of thermally aged vegetable-based oils as high voltage insulating material
title_full	Electrical and chemical properties of thermally aged vegetable-based oils as high voltage insulating material
title_fullStr	Electrical and chemical properties of thermally aged vegetable-based oils as high voltage insulating material
title_full_unstemmed	Electrical and chemical properties of thermally aged vegetable-based oils as high voltage insulating material
title_sort	electrical and chemical properties of thermally aged vegetable-based oils as high voltage insulating material
granting_institution	Universiti Teknologi Malaysia, Faculty of Electrical Engineering
granting_department	Faculty of Electrical Engineering
publishDate	2015
url	http://eprints.utm.my/id/eprint/53847/1/MuhammadSafwanMFKE2015.pdf
_version_	1747817641217622016

Electrical and chemical properties of thermally aged vegetable-based oils as high voltage insulating material

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