Assessment of transformer winding displacement faults by frequency response analysis

According to the statistics of transformer accidents from 1995 to 1998, nearly 50% of the accidents were caused by short circuit, and the number is still increasing. In other words, diagnostic test technique on winding displacement is very important, by which hidden troubles can be found in advance,...

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Main Author:	Muhamad, Shahriman
Format:	Thesis
Published:	2010
Subjects:	Unspecified
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spelling	my-utm-ep.264202017-08-16T03:21:20Z Assessment of transformer winding displacement faults by frequency response analysis 2010 Muhamad, Shahriman Unspecified According to the statistics of transformer accidents from 1995 to 1998, nearly 50% of the accidents were caused by short circuit, and the number is still increasing. In other words, diagnostic test technique on winding displacement is very important, by which hidden troubles can be found in advance, so the transformer can be arranged for repairing by schedule. The main methods on detection of transformer winding displacement are Short Circuit Impedance Measurement (SCI), Low Voltage Impulse Method (LVI), and Frequency Response Analysis Method (FRA). The Short Circuit Impedance Measurement is not widely used on site because its sensitivity is low and the hidden trouble can not be found effectively. On the hand, the sensitivity of LVI and FRA is high, their principles are similar. However, the parameter of single impulse voltage source used in LVI can hardly be the same all the time, and therefore the FRA is the most suitable method on site. Every transformer winding has a unique signature that is sensitive to changes in the parameters of the winding, namely resistance, inductance, and capacitance. Frequency spectrum of a transformer is very sensitive to any displacement of the winding. Practical case studies are presented that demonstrates the effectiveness of this technique. Again FRA has proven itself to be a valuable diagnostic tool for the detection of winding displacement fault. 2010 Thesis http://eprints.utm.my/id/eprint/26420/ http://libraryopac.utm.my/client/en_AU/main/search/results?qu=Assessment+of+transformer+winding+displacement+faults+by+frequency+response+analysis&te= masters Universiti Teknologi Malaysia, Faculty of Electrical Engineering Faculty of Electrical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
topic	Unspecified
spellingShingle	Unspecified Muhamad, Shahriman Assessment of transformer winding displacement faults by frequency response analysis
description	According to the statistics of transformer accidents from 1995 to 1998, nearly 50% of the accidents were caused by short circuit, and the number is still increasing. In other words, diagnostic test technique on winding displacement is very important, by which hidden troubles can be found in advance, so the transformer can be arranged for repairing by schedule. The main methods on detection of transformer winding displacement are Short Circuit Impedance Measurement (SCI), Low Voltage Impulse Method (LVI), and Frequency Response Analysis Method (FRA). The Short Circuit Impedance Measurement is not widely used on site because its sensitivity is low and the hidden trouble can not be found effectively. On the hand, the sensitivity of LVI and FRA is high, their principles are similar. However, the parameter of single impulse voltage source used in LVI can hardly be the same all the time, and therefore the FRA is the most suitable method on site. Every transformer winding has a unique signature that is sensitive to changes in the parameters of the winding, namely resistance, inductance, and capacitance. Frequency spectrum of a transformer is very sensitive to any displacement of the winding. Practical case studies are presented that demonstrates the effectiveness of this technique. Again FRA has proven itself to be a valuable diagnostic tool for the detection of winding displacement fault.
format	Thesis
qualification_level	Master's degree
author	Muhamad, Shahriman
author_facet	Muhamad, Shahriman
author_sort	Muhamad, Shahriman
title	Assessment of transformer winding displacement faults by frequency response analysis
title_short	Assessment of transformer winding displacement faults by frequency response analysis
title_full	Assessment of transformer winding displacement faults by frequency response analysis
title_fullStr	Assessment of transformer winding displacement faults by frequency response analysis
title_full_unstemmed	Assessment of transformer winding displacement faults by frequency response analysis
title_sort	assessment of transformer winding displacement faults by frequency response analysis
granting_institution	Universiti Teknologi Malaysia, Faculty of Electrical Engineering
granting_department	Faculty of Electrical Engineering
publishDate	2010
_version_	1747815472084025344

Assessment of transformer winding displacement faults by frequency response analysis

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