Insulator surface condition monitoring system for leakage current analysis

There are several ageing factors that affect the long term performance of insulating material such as electrical stress, biological attack, and outdoor weathering contamination. Leakage Current (LC) is one of the key methods of measuring the insulator surface conditions which can cause tracking, ero...

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Main Author:	Zainal Abidin, Nur Qamarina
Format:	Thesis
Language:	English English
Published:	2015
Subjects:	T Technology (General)
Online Access:	http://eprints.utem.edu.my/id/eprint/16835/1/Insulator%20Surface%20Condition%20Monitoring%20System%20For%20Leakage%20Current%20Analysis.pdf http://eprints.utem.edu.my/id/eprint/16835/2/Insulator%20surface%20condition%20monitoring%20system%20for%20leakage%20current%20analysis.pdf
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id	my-utem-ep.16835
record_format	uketd_dc
institution	Universiti Teknikal Malaysia Melaka
collection	UTeM Repository
language	English English
advisor	Abdullah, Abdul Rahim
topic	T Technology (General) T Technology (General)
spellingShingle	T Technology (General) T Technology (General) Zainal Abidin, Nur Qamarina Insulator surface condition monitoring system for leakage current analysis
description	There are several ageing factors that affect the long term performance of insulating material such as electrical stress, biological attack, and outdoor weathering contamination. Leakage Current (LC) is one of the key methods of measuring the insulator surface conditions which can cause tracking, erosion and flashover. Hence, an automated monitoring system is needed to reduce diagnostic time, rectify severity and ensure quality of insulator performance. This research presents the development of leakage current monitoring system to analyse insulator surface condition using Time-Frequency Distribution (TFD). To develop the system, a pre-information of the leakage current signal analysis is needed. Many previous researchers used Fast Fourier Transform (FFT) method for the analysis which gives spectral information; but it has some limitations in non-stationary signal, for example it does not provide temporal information. In this research, spectrogram is used to analyse the leakage current signals that consist of multi-frequency components and magnitude variations. From the Time-frequency representation (TFR) obtained using the time-frequency distribution, parameters of leakage current signal are calculated such as instantaneous of root mean square (RMS) current, fundamental RMS current, total harmonic distortion, total non-harmonic distortion, and total waveform distortion. The leakage current signals have different states such as capacitive, resistive, symmetrical and unsymmetrical waveforms that classifies the surface condition of the polymeric insulation. Tracking and erosion tests based on BS EN 60587-2007 standard are developed and constructed to capture the set of those leakage current states. Then, the leakage current signals are captured and transfer to personal computer using data acquisition system (DAQ) for monitoring and storing purpose. Graphical User Interface (GUI) is developed using Visual Basic (VB) for the real time analysis of the leakage current for insulator surface condition monitoring system. At the end of this research, the developed system shows that it is appropriate and reliable to implement the leakage current monitoring system for determining the leakage current characteristic of insulating surface condition.
format	Thesis
qualification_name	Master of Philosophy (M.Phil.)
qualification_level	Master's degree
author	Zainal Abidin, Nur Qamarina
author_facet	Zainal Abidin, Nur Qamarina
author_sort	Zainal Abidin, Nur Qamarina
title	Insulator surface condition monitoring system for leakage current analysis
title_short	Insulator surface condition monitoring system for leakage current analysis
title_full	Insulator surface condition monitoring system for leakage current analysis
title_fullStr	Insulator surface condition monitoring system for leakage current analysis
title_full_unstemmed	Insulator surface condition monitoring system for leakage current analysis
title_sort	insulator surface condition monitoring system for leakage current analysis
granting_institution	Universiti Teknikal Malaysia Melaka
granting_department	Faculty Of Electrical Engineering
publishDate	2015
url	http://eprints.utem.edu.my/id/eprint/16835/1/Insulator%20Surface%20Condition%20Monitoring%20System%20For%20Leakage%20Current%20Analysis.pdf http://eprints.utem.edu.my/id/eprint/16835/2/Insulator%20surface%20condition%20monitoring%20system%20for%20leakage%20current%20analysis.pdf
_version_	1747833899435687936
spelling	my-utem-ep.168352022-06-07T13:17:35Z Insulator surface condition monitoring system for leakage current analysis 2015 Zainal Abidin, Nur Qamarina T Technology (General) TK Electrical engineering. Electronics Nuclear engineering There are several ageing factors that affect the long term performance of insulating material such as electrical stress, biological attack, and outdoor weathering contamination. Leakage Current (LC) is one of the key methods of measuring the insulator surface conditions which can cause tracking, erosion and flashover. Hence, an automated monitoring system is needed to reduce diagnostic time, rectify severity and ensure quality of insulator performance. This research presents the development of leakage current monitoring system to analyse insulator surface condition using Time-Frequency Distribution (TFD). To develop the system, a pre-information of the leakage current signal analysis is needed. Many previous researchers used Fast Fourier Transform (FFT) method for the analysis which gives spectral information; but it has some limitations in non-stationary signal, for example it does not provide temporal information. In this research, spectrogram is used to analyse the leakage current signals that consist of multi-frequency components and magnitude variations. From the Time-frequency representation (TFR) obtained using the time-frequency distribution, parameters of leakage current signal are calculated such as instantaneous of root mean square (RMS) current, fundamental RMS current, total harmonic distortion, total non-harmonic distortion, and total waveform distortion. The leakage current signals have different states such as capacitive, resistive, symmetrical and unsymmetrical waveforms that classifies the surface condition of the polymeric insulation. Tracking and erosion tests based on BS EN 60587-2007 standard are developed and constructed to capture the set of those leakage current states. Then, the leakage current signals are captured and transfer to personal computer using data acquisition system (DAQ) for monitoring and storing purpose. Graphical User Interface (GUI) is developed using Visual Basic (VB) for the real time analysis of the leakage current for insulator surface condition monitoring system. At the end of this research, the developed system shows that it is appropriate and reliable to implement the leakage current monitoring system for determining the leakage current characteristic of insulating surface condition. 2015 Thesis http://eprints.utem.edu.my/id/eprint/16835/ http://eprints.utem.edu.my/id/eprint/16835/1/Insulator%20Surface%20Condition%20Monitoring%20System%20For%20Leakage%20Current%20Analysis.pdf text en public http://eprints.utem.edu.my/id/eprint/16835/2/Insulator%20surface%20condition%20monitoring%20system%20for%20leakage%20current%20analysis.pdf text en validuser https://plh.utem.edu.my/cgi-bin/koha/opac-detail.pl?biblionumber=96173 mphil masters Universiti Teknikal Malaysia Melaka Faculty Of Electrical Engineering Abdullah, Abdul Rahim 1. Abdullah, A. R. 2011. time frequency analysis for power quality disturbances detection and classification. PHD, Faculty of Electrical Engineering, Universiti Teknologi Malaysia. 2. Abdullah, A. R., Norddin, N., Abidin, N. 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Insulator surface condition monitoring system for leakage current analysis

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