Investigations of ageing mechanism and electrical withstand performances of the field aged 132 kV PMU Skudai's ceramic post insulator

This thesis presents investigation of 132kV field-aged ceramic post insulator, which has been in service 15 years old on a 132kV in PMU Skudai substation. Insulators are devices which are used in electricity supply networks to support, separate or contain conductors at high voltage. Aging of cera...

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Main Author:	Thazali, Nur Athirah
Format:	Thesis
Language:	English English English
Published:	2013
Subjects:	TK Electrical engineering Electronics Nuclear engineering TK3001-3521 Distribution or transmission of electric power
Online Access:	http://eprints.uthm.edu.my/2036/1/24p%20NUR%20ATHIRAH%20THAZALI.pdf http://eprints.uthm.edu.my/2036/2/NUR%20ATHIRAH%20THAZALI%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/2036/3/NUR%20ATHIRAH%20THAZALI%20WATERMARK.pdf
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spelling	my-uthm-ep.20362021-10-31T01:22:17Z Investigations of ageing mechanism and electrical withstand performances of the field aged 132 kV PMU Skudai's ceramic post insulator 2013-01 Thazali, Nur Athirah TK Electrical engineering. Electronics Nuclear engineering TK3001-3521 Distribution or transmission of electric power This thesis presents investigation of 132kV field-aged ceramic post insulator, which has been in service 15 years old on a 132kV in PMU Skudai substation. Insulators are devices which are used in electricity supply networks to support, separate or contain conductors at high voltage. Aging of ceramic and post insulator materials is reviewed mainly from the standpoint of their interfacial performance. Insulating materials can be divided into simple ceramics. Aging processes are complicated in general, and take place under simultaneous multiple stresses such as electrical, mechanical and environmental stresses. Contact angle measured insulation under consideration leads to the surface is approximately horizontal to the top surface. The sheds also aged differently around their circumference and this is reflected in discoloration differences on different sides of the insulator, in addition to hydrophobicity changes. Voltage breakdown measurements carried out in the laboratory are also presented. Material analysis shows oxidation of the surface. Ageing effects were different uniform for each shed, the greatest oxidation being on the top surfaces of the sheds on the west and east side. Microscopy was found to be the most useful and effective tools for analysis of these ceramic insulator. The measurements of the various parameters over the whole surface of the insulators are found to be consistent with each other and can be interpreted in terms of the chemistry of ageing and the longer term performance of the specific insulators in question. Two distinct types of ageing are identified. The role of solar radiation appears critical. In summary, the post insulators which have been in service for 15 years have very non-uniform surface properties in both the vertical and circumferential directions. There are some surface area at insulator has a moisture contamination at each creepage where found at all direction. 2013-01 Thesis http://eprints.uthm.edu.my/2036/ http://eprints.uthm.edu.my/2036/1/24p%20NUR%20ATHIRAH%20THAZALI.pdf text en public http://eprints.uthm.edu.my/2036/2/NUR%20ATHIRAH%20THAZALI%20COPYRIGHT%20DECLARATION.pdf text en staffonly http://eprints.uthm.edu.my/2036/3/NUR%20ATHIRAH%20THAZALI%20WATERMARK.pdf text en validuser mphil masters Universiti Tun Hussein Malaysia Fakulti Kejuruteraan Elektrik dan Elektronik
institution	Universiti Tun Hussein Onn Malaysia
collection	UTHM Institutional Repository
language	English English English
topic	TK Electrical engineering Electronics Nuclear engineering TK3001-3521 Distribution or transmission of electric power
spellingShingle	TK Electrical engineering Electronics Nuclear engineering TK3001-3521 Distribution or transmission of electric power Thazali, Nur Athirah Investigations of ageing mechanism and electrical withstand performances of the field aged 132 kV PMU Skudai's ceramic post insulator
description	This thesis presents investigation of 132kV field-aged ceramic post insulator, which has been in service 15 years old on a 132kV in PMU Skudai substation. Insulators are devices which are used in electricity supply networks to support, separate or contain conductors at high voltage. Aging of ceramic and post insulator materials is reviewed mainly from the standpoint of their interfacial performance. Insulating materials can be divided into simple ceramics. Aging processes are complicated in general, and take place under simultaneous multiple stresses such as electrical, mechanical and environmental stresses. Contact angle measured insulation under consideration leads to the surface is approximately horizontal to the top surface. The sheds also aged differently around their circumference and this is reflected in discoloration differences on different sides of the insulator, in addition to hydrophobicity changes. Voltage breakdown measurements carried out in the laboratory are also presented. Material analysis shows oxidation of the surface. Ageing effects were different uniform for each shed, the greatest oxidation being on the top surfaces of the sheds on the west and east side. Microscopy was found to be the most useful and effective tools for analysis of these ceramic insulator. The measurements of the various parameters over the whole surface of the insulators are found to be consistent with each other and can be interpreted in terms of the chemistry of ageing and the longer term performance of the specific insulators in question. Two distinct types of ageing are identified. The role of solar radiation appears critical. In summary, the post insulators which have been in service for 15 years have very non-uniform surface properties in both the vertical and circumferential directions. There are some surface area at insulator has a moisture contamination at each creepage where found at all direction.
format	Thesis
qualification_name	Master of Philosophy (M.Phil.)
qualification_level	Master's degree
author	Thazali, Nur Athirah
author_facet	Thazali, Nur Athirah
author_sort	Thazali, Nur Athirah
title	Investigations of ageing mechanism and electrical withstand performances of the field aged 132 kV PMU Skudai's ceramic post insulator
title_short	Investigations of ageing mechanism and electrical withstand performances of the field aged 132 kV PMU Skudai's ceramic post insulator
title_full	Investigations of ageing mechanism and electrical withstand performances of the field aged 132 kV PMU Skudai's ceramic post insulator
title_fullStr	Investigations of ageing mechanism and electrical withstand performances of the field aged 132 kV PMU Skudai's ceramic post insulator
title_full_unstemmed	Investigations of ageing mechanism and electrical withstand performances of the field aged 132 kV PMU Skudai's ceramic post insulator
title_sort	investigations of ageing mechanism and electrical withstand performances of the field aged 132 kv pmu skudai's ceramic post insulator
granting_institution	Universiti Tun Hussein Malaysia
granting_department	Fakulti Kejuruteraan Elektrik dan Elektronik
publishDate	2013
url	http://eprints.uthm.edu.my/2036/1/24p%20NUR%20ATHIRAH%20THAZALI.pdf http://eprints.uthm.edu.my/2036/2/NUR%20ATHIRAH%20THAZALI%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/2036/3/NUR%20ATHIRAH%20THAZALI%20WATERMARK.pdf
_version_	1747830902226944000

Investigations of ageing mechanism and electrical withstand performances of the field aged 132 kV PMU Skudai's ceramic post insulator

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