An improved switching and control technique in polarization and depolarization current measurement applications

Polarization and Depolarization Current (PDC) measurement is one of the methods used to assess the insulation conditions of the High Voltage (HV) apparatus. PDC testing is a non-destructive dielectric diagnostic testing technique employed to determine the conductivity and moisture content of electri...

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Main Author:	Kasri, Nur Faizal
Format:	Thesis
Language:	English
Published:	2014
Subjects:	TK Electrical engineering Electronics Nuclear engineering
Online Access:	http://eprints.utm.my/id/eprint/48018/25/NurFaizalKasriMFKE2014.pdf
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spelling	my-utm-ep.480182017-07-20T06:38:41Z An improved switching and control technique in polarization and depolarization current measurement applications 2014-09 Kasri, Nur Faizal TK Electrical engineering. Electronics Nuclear engineering Polarization and Depolarization Current (PDC) measurement is one of the methods used to assess the insulation conditions of the High Voltage (HV) apparatus. PDC testing is a non-destructive dielectric diagnostic testing technique employed to determine the conductivity and moisture content of electric insulators. Due to rapid and advancing changes in insulation material technology, an improvement of the PDC measurement system is required to cope with new and emerging materials. Thus, the reliability of the PDC measuring system to accurately measure and record the charging and discharging currents is a crucial factor that cannot be overemphasized. Therefore, in this study, a PDC measurement switching circuit was designed and simulated using the Multisim 10 software and practically tested in order to obtain accurate and reliable results. The design included the reduction of HV relays from four to two, introduction of a safety feature to protect the electrometer and a LabVIEW software programme to control switching activity and data recording. A user friendly Graphic User Interface (GUI) was provided to make the programme user friendly. Furthermore, the study included the construction and testing of the simulated PDC switch. When the switch was tested on some insulation materials that included polymeric, cellulose and liquid insulators, the result shows that this system is able to accurately replicate the popularly known and accepted PDC pattern and also measure the polarization current (idp) and depolarization current (ip) of some of these materials in Pico-amperes (x 10-12 A). The validity and reliability of this system were ratified after conduction of these tests. It is concluded that the experimental and theoretical PDC current response patterns are comparable and thus this system is reliable, and the results produced are valid for further analysis. 2014-09 Thesis http://eprints.utm.my/id/eprint/48018/ http://eprints.utm.my/id/eprint/48018/25/NurFaizalKasriMFKE2014.pdf application/pdf en public 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 Kasri, Nur Faizal An improved switching and control technique in polarization and depolarization current measurement applications
description	Polarization and Depolarization Current (PDC) measurement is one of the methods used to assess the insulation conditions of the High Voltage (HV) apparatus. PDC testing is a non-destructive dielectric diagnostic testing technique employed to determine the conductivity and moisture content of electric insulators. Due to rapid and advancing changes in insulation material technology, an improvement of the PDC measurement system is required to cope with new and emerging materials. Thus, the reliability of the PDC measuring system to accurately measure and record the charging and discharging currents is a crucial factor that cannot be overemphasized. Therefore, in this study, a PDC measurement switching circuit was designed and simulated using the Multisim 10 software and practically tested in order to obtain accurate and reliable results. The design included the reduction of HV relays from four to two, introduction of a safety feature to protect the electrometer and a LabVIEW software programme to control switching activity and data recording. A user friendly Graphic User Interface (GUI) was provided to make the programme user friendly. Furthermore, the study included the construction and testing of the simulated PDC switch. When the switch was tested on some insulation materials that included polymeric, cellulose and liquid insulators, the result shows that this system is able to accurately replicate the popularly known and accepted PDC pattern and also measure the polarization current (idp) and depolarization current (ip) of some of these materials in Pico-amperes (x 10-12 A). The validity and reliability of this system were ratified after conduction of these tests. It is concluded that the experimental and theoretical PDC current response patterns are comparable and thus this system is reliable, and the results produced are valid for further analysis.
format	Thesis
qualification_level	Master's degree
author	Kasri, Nur Faizal
author_facet	Kasri, Nur Faizal
author_sort	Kasri, Nur Faizal
title	An improved switching and control technique in polarization and depolarization current measurement applications
title_short	An improved switching and control technique in polarization and depolarization current measurement applications
title_full	An improved switching and control technique in polarization and depolarization current measurement applications
title_fullStr	An improved switching and control technique in polarization and depolarization current measurement applications
title_full_unstemmed	An improved switching and control technique in polarization and depolarization current measurement applications
title_sort	improved switching and control technique in polarization and depolarization current measurement applications
granting_institution	Universiti Teknologi Malaysia, Faculty of Electrical Engineering
granting_department	Faculty of Electrical Engineering
publishDate	2014
url	http://eprints.utm.my/id/eprint/48018/25/NurFaizalKasriMFKE2014.pdf
_version_	1747817287788789760

An improved switching and control technique in polarization and depolarization current measurement applications

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