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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)
TK Electrical engineering. Electronics Nuclear engineering
Online Access:http://eprints.utem.edu.my/id/eprint/16212/1/High%20Voltage%20Insulation%20Surface%20Condition%20Analysis%20Using%20Time%20Frequency%20Distributions%2024%20Pages.pdf
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spelling my.utem.eprints.162122022-02-21T11:34:13Z http://eprints.utem.edu.my/id/eprint/16212/ High Voltage Insulation Surface Condition Analysis Using Time Frequency Distributions 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 NonPeerReviewed text en http://eprints.utem.edu.my/id/eprint/16212/1/High%20Voltage%20Insulation%20Surface%20Condition%20Analysis%20Using%20Time%20Frequency%20Distributions%2024%20Pages.pdf text en http://eprints.utem.edu.my/id/eprint/16212/2/High%20Voltage%20Insulation%20Surface%20Condition%20Analysis%20Using%20Time%20Frequency%20Distributions.pdf Nurbahirah, Norddin (2014) High Voltage Insulation Surface Condition Analysis Using Time Frequency Distributions. Masters thesis, Universiti Teknikal Malaysia Melaka. http://library.utem.edu.my:8000/elmu/index.jsp?module=webopac-d&action=fullDisplayRetriever.jsp&szMaterialNo=0000091000
institution Universiti Teknikal Malaysia Melaka
building UTEM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknikal Malaysia Melaka
content_source UTEM Institutional Repository
url_provider http://eprints.utem.edu.my/
language English
English
topic T Technology (General)
TK Electrical engineering. Electronics Nuclear engineering
spellingShingle T Technology (General)
TK Electrical engineering. Electronics Nuclear engineering
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
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
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
http://eprints.utem.edu.my/id/eprint/16212/
http://library.utem.edu.my:8000/elmu/index.jsp?module=webopac-d&action=fullDisplayRetriever.jsp&szMaterialNo=0000091000
_version_ 1725976095309692928
score 13.211869

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