High Voltage Insulation Surface Condition Analysis Using Time Frequency Distributions

In high voltage engineering, insulation is the most important part to prevent the flow of current to undesired paths. Currently, polymeric type of insulation is widely used because of its advantages which are light, easy to fabricate, and have good dielectric properties compared to traditional ceram...

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Main Author:	Nurbahirah, Norddin
Format:	Thesis
Language:	English English
Published:	2014
Subjects:	T Technology (General)
Online Access:	http://eprints.utem.edu.my/id/eprint/16212/1/High%20Voltage%20Insulation%20Surface%20Condition%20Analysis%20Using%20Time%20Frequency%20Distributions%2024%20Pages.pdf http://eprints.utem.edu.my/id/eprint/16212/2/High%20Voltage%20Insulation%20Surface%20Condition%20Analysis%20Using%20Time%20Frequency%20Distributions.pdf
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id	my-utem-ep.16212
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spelling	my-utem-ep.162122022-02-21T11:34:13Z High Voltage Insulation Surface Condition Analysis Using Time Frequency Distributions 2014 Nurbahirah, Norddin T Technology (General) TK Electrical engineering. Electronics Nuclear engineering In high voltage engineering, insulation is the most important part to prevent the flow of current to undesired paths. Currently, polymeric type of insulation is widely used because of its advantages which are light, easy to fabricate, and have good dielectric properties compared to traditional ceramic or non polymeric insulation. In previous researches, leakage current frequency component is mainly used to analyze surface condition of polymeric insulation and it is, normally, analyzed by using fast Fourier transform (FFT). However, the technique only presents spectral information and is not suitable for the leakage current signal that consists of magnitude and frequency variations. Thus, time-frequency analysis technique needs to be employed to provide spectral and temporal information of the signal. This research presents the analysis of leakage current using time-frequency distributions (TFDs). Time-frequency distributions (TFDs) such as spectrogram and S-transform are applied to represent the leakage current (LC) in time-frequency representation (TFR). These techniques extract relevant information from TFR include root mean square current (RMS), total harmonic distortion (THD), total non harmonic distortion (TnHD) and total current waveform distortion (TWD). Tracking and erosion test via Incline Plane Test complying with BS EN60587-2007 is conducted to collect different leakage current patterns on polymeric and non polymeric material. Furthermore, the performance of the TFDs is evaluated based on their TFRs accuracy and the results shows that S-transform outperforms spectrogram in term of frequency and time resolution. Thus, the classification of leakage current using parameters from S-transform can be implemented to determine material state and severity instantaneously. 2014 Thesis http://eprints.utem.edu.my/id/eprint/16212/ http://eprints.utem.edu.my/id/eprint/16212/1/High%20Voltage%20Insulation%20Surface%20Condition%20Analysis%20Using%20Time%20Frequency%20Distributions%2024%20Pages.pdf text en public http://eprints.utem.edu.my/id/eprint/16212/2/High%20Voltage%20Insulation%20Surface%20Condition%20Analysis%20Using%20Time%20Frequency%20Distributions.pdf text en validuser http://library.utem.edu.my:8000/elmu/index.jsp?module=webopac-d&action=fullDisplayRetriever.jsp&szMaterialNo=0000091000 mphil masters Universiti Teknikal Malaysia Melaka Faculty Of Electrical Engineering
institution	Universiti Teknikal Malaysia Melaka
collection	UTeM Repository
language	English English
topic	T Technology (General) T Technology (General)
spellingShingle	T Technology (General) T Technology (General) Nurbahirah, Norddin High Voltage Insulation Surface Condition Analysis Using Time Frequency Distributions
description	In high voltage engineering, insulation is the most important part to prevent the flow of current to undesired paths. Currently, polymeric type of insulation is widely used because of its advantages which are light, easy to fabricate, and have good dielectric properties compared to traditional ceramic or non polymeric insulation. In previous researches, leakage current frequency component is mainly used to analyze surface condition of polymeric insulation and it is, normally, analyzed by using fast Fourier transform (FFT). However, the technique only presents spectral information and is not suitable for the leakage current signal that consists of magnitude and frequency variations. Thus, time-frequency analysis technique needs to be employed to provide spectral and temporal information of the signal. This research presents the analysis of leakage current using time-frequency distributions (TFDs). Time-frequency distributions (TFDs) such as spectrogram and S-transform are applied to represent the leakage current (LC) in time-frequency representation (TFR). These techniques extract relevant information from TFR include root mean square current (RMS), total harmonic distortion (THD), total non harmonic distortion (TnHD) and total current waveform distortion (TWD). Tracking and erosion test via Incline Plane Test complying with BS EN60587-2007 is conducted to collect different leakage current patterns on polymeric and non polymeric material. Furthermore, the performance of the TFDs is evaluated based on their TFRs accuracy and the results shows that S-transform outperforms spectrogram in term of frequency and time resolution. Thus, the classification of leakage current using parameters from S-transform can be implemented to determine material state and severity instantaneously.
format	Thesis
qualification_name	Master of Philosophy (M.Phil.)
qualification_level	Master's degree
author	Nurbahirah, Norddin
author_facet	Nurbahirah, Norddin
author_sort	Nurbahirah, Norddin
title	High Voltage Insulation Surface Condition Analysis Using Time Frequency Distributions
title_short	High Voltage Insulation Surface Condition Analysis Using Time Frequency Distributions
title_full	High Voltage Insulation Surface Condition Analysis Using Time Frequency Distributions
title_fullStr	High Voltage Insulation Surface Condition Analysis Using Time Frequency Distributions
title_full_unstemmed	High Voltage Insulation Surface Condition Analysis Using Time Frequency Distributions
title_sort	high voltage insulation surface condition analysis using time frequency distributions
granting_institution	Universiti Teknikal Malaysia Melaka
granting_department	Faculty Of Electrical Engineering
publishDate	2014
url	http://eprints.utem.edu.my/id/eprint/16212/1/High%20Voltage%20Insulation%20Surface%20Condition%20Analysis%20Using%20Time%20Frequency%20Distributions%2024%20Pages.pdf http://eprints.utem.edu.my/id/eprint/16212/2/High%20Voltage%20Insulation%20Surface%20Condition%20Analysis%20Using%20Time%20Frequency%20Distributions.pdf
_version_	1747833886457462784

High Voltage Insulation Surface Condition Analysis Using Time Frequency Distributions

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