Cover Image

Electrical performance of polymer-type insulators under various service and lightning voltage conditions

Nowadays, the usage of polymer insulators are increasingly popular in the power systems and their outdoor application has resulted in the exposure to the various service conditions such as weather, pollution and lightning conditions. This study expanded previous researches by considering on the e...

Full description

Saved in:
Bibliographic Details
Main Author: Abd Rahman, Muhammad Syahmi
Format: Thesis
Language:English
Published: 2016
Online Access:http://psasir.upm.edu.my/id/eprint/67078/1/FK%202016%20149%20IR.pdf
http://psasir.upm.edu.my/id/eprint/67078/
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.upm.eprints.67078
record_format eprints
spelling my.upm.eprints.670782019-02-19T02:29:48Z http://psasir.upm.edu.my/id/eprint/67078/ Electrical performance of polymer-type insulators under various service and lightning voltage conditions Abd Rahman, Muhammad Syahmi Nowadays, the usage of polymer insulators are increasingly popular in the power systems and their outdoor application has resulted in the exposure to the various service conditions such as weather, pollution and lightning conditions. This study expanded previous researches by considering on the effects of wetting and pollution, i.e. clean-fog and salt-fog on the breakdown strength, voltage, electric field intensity and current density performance of a 10 kV polymer insulator under lightning impulse voltage. A set of experimental (based on IEC 60507) and simulation works revealed that the breakdown strength of insulator has significantly reduced under wet and pollution conditions where 21.18% and 53.33% of reduction was recorded, respectively due to the increase of surface conduction. Besides, the effect of insulator inclination under wetting and different pollution conditions were considered through both lab measurements and finite element modelling. The results indicated that the performance of insulator reduced up to 18.33% and the changes of electric field intensity around the insulator has been one of the factors. It should be mentioned that the inclination of insulator is one of the major problems in the electrical utilities due to line mechanical forces and the deficiency of the equipment itself. The reduction factor of U50 which is obtained from the study can be useful during the planning stage of the distribution line. The effect of lightning induced voltage on the electrical performance of polymer insulator was studied in this thesis, as it is one of the major factors for interruption of distribution lines in Malaysia. Note that the lightning induced voltage is due to the coupling between lightning electromagnetic fields and line condutors. The behaviours of electric field and voltage distribution in different parts of the insulator under lightning induced voltage condition were considered where the effects of pollution thickness, different pollution profile and humidity were investigated. It is expressed that the thickening of surface pollution can significantly increase the electric field intensity and current density for at most 62.17%. This study also found that the electric field increases due to the formation of the dry-band. Meanwhile, the increase in air humidity has been responsible to increase current density stress on the insulator surface. 2016-11 Thesis NonPeerReviewed text en http://psasir.upm.edu.my/id/eprint/67078/1/FK%202016%20149%20IR.pdf Abd Rahman, Muhammad Syahmi (2016) Electrical performance of polymer-type insulators under various service and lightning voltage conditions. Masters thesis, Universiti Putra Malaysia.
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 Nowadays, the usage of polymer insulators are increasingly popular in the power systems and their outdoor application has resulted in the exposure to the various service conditions such as weather, pollution and lightning conditions. This study expanded previous researches by considering on the effects of wetting and pollution, i.e. clean-fog and salt-fog on the breakdown strength, voltage, electric field intensity and current density performance of a 10 kV polymer insulator under lightning impulse voltage. A set of experimental (based on IEC 60507) and simulation works revealed that the breakdown strength of insulator has significantly reduced under wet and pollution conditions where 21.18% and 53.33% of reduction was recorded, respectively due to the increase of surface conduction. Besides, the effect of insulator inclination under wetting and different pollution conditions were considered through both lab measurements and finite element modelling. The results indicated that the performance of insulator reduced up to 18.33% and the changes of electric field intensity around the insulator has been one of the factors. It should be mentioned that the inclination of insulator is one of the major problems in the electrical utilities due to line mechanical forces and the deficiency of the equipment itself. The reduction factor of U50 which is obtained from the study can be useful during the planning stage of the distribution line. The effect of lightning induced voltage on the electrical performance of polymer insulator was studied in this thesis, as it is one of the major factors for interruption of distribution lines in Malaysia. Note that the lightning induced voltage is due to the coupling between lightning electromagnetic fields and line condutors. The behaviours of electric field and voltage distribution in different parts of the insulator under lightning induced voltage condition were considered where the effects of pollution thickness, different pollution profile and humidity were investigated. It is expressed that the thickening of surface pollution can significantly increase the electric field intensity and current density for at most 62.17%. This study also found that the electric field increases due to the formation of the dry-band. Meanwhile, the increase in air humidity has been responsible to increase current density stress on the insulator surface.
format Thesis
author Abd Rahman, Muhammad Syahmi
spellingShingle Abd Rahman, Muhammad Syahmi
Electrical performance of polymer-type insulators under various service and lightning voltage conditions
author_facet Abd Rahman, Muhammad Syahmi
author_sort Abd Rahman, Muhammad Syahmi
title Electrical performance of polymer-type insulators under various service and lightning voltage conditions
title_short Electrical performance of polymer-type insulators under various service and lightning voltage conditions
title_full Electrical performance of polymer-type insulators under various service and lightning voltage conditions
title_fullStr Electrical performance of polymer-type insulators under various service and lightning voltage conditions
title_full_unstemmed Electrical performance of polymer-type insulators under various service and lightning voltage conditions
title_sort electrical performance of polymer-type insulators under various service and lightning voltage conditions
publishDate 2016
url http://psasir.upm.edu.my/id/eprint/67078/1/FK%202016%20149%20IR.pdf
http://psasir.upm.edu.my/id/eprint/67078/
_version_ 1643838798603223040
score 13.211869

Similar Items