Transformation Algorithm of Dielectric Response in Time-Frequency Domain

A transformation algorithm of dielectric response from time domain to frequency domain is presented. In order to shorten measuring time of low or ultralow frequency dielectric response characteristics, the transformation algorithm is used in this paper to transform the time domain relaxation current...

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Main Authors: Ji Liu, Daning Zhang, Xinlao Wei, Hamid Reza Karimi
Format: Article
Language:English
Published: Hindawi Limited 2014-01-01
Series:Mathematical Problems in Engineering
Online Access:http://dx.doi.org/10.1155/2014/547105
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spelling doaj-258d56a124b84920af829cddd9630e202020-11-24T23:46:43ZengHindawi LimitedMathematical Problems in Engineering1024-123X1563-51472014-01-01201410.1155/2014/547105547105Transformation Algorithm of Dielectric Response in Time-Frequency DomainJi Liu0Daning Zhang1Xinlao Wei2Hamid Reza Karimi3State Key Laboratory Breeding Base of Dielectrics Engineering, Harbin University of Science and Technology, Harbin, Heilongjiang 150080, ChinaState Key Laboratory Breeding Base of Dielectrics Engineering, Harbin University of Science and Technology, Harbin, Heilongjiang 150080, ChinaState Key Laboratory Breeding Base of Dielectrics Engineering, Harbin University of Science and Technology, Harbin, Heilongjiang 150080, ChinaDepartment of Engineering, Faculty of Engineering and Science, University of Agder, 4898 Grimstad, NorwayA transformation algorithm of dielectric response from time domain to frequency domain is presented. In order to shorten measuring time of low or ultralow frequency dielectric response characteristics, the transformation algorithm is used in this paper to transform the time domain relaxation current to frequency domain current for calculating the low frequency dielectric dissipation factor. In addition, it is shown from comparing the calculation results with actual test data that there is a coincidence for both results over a wide range of low frequencies. Meanwhile, the time domain test data of depolarization currents in dry and moist pressboards are converted into frequency domain results on the basis of the transformation. The frequency domain curves of complex capacitance and dielectric dissipation factor at the low frequency range are obtained. Test results of polarization and depolarization current (PDC) in pressboards are also given at the different voltage and polarization time. It is demonstrated from the experimental results that polarization and depolarization current are affected significantly by moisture contents of the test pressboards, and the transformation algorithm is effective in ultralow frequency of 10−3 Hz. Data analysis and interpretation of the test results conclude that analysis of time-frequency domain dielectric response can be used for assessing insulation system in power transformer.http://dx.doi.org/10.1155/2014/547105
collection DOAJ
language English
format Article
sources DOAJ
author Ji Liu
Daning Zhang
Xinlao Wei
Hamid Reza Karimi
spellingShingle Ji Liu
Daning Zhang
Xinlao Wei
Hamid Reza Karimi
Transformation Algorithm of Dielectric Response in Time-Frequency Domain
Mathematical Problems in Engineering
author_facet Ji Liu
Daning Zhang
Xinlao Wei
Hamid Reza Karimi
author_sort Ji Liu
title Transformation Algorithm of Dielectric Response in Time-Frequency Domain
title_short Transformation Algorithm of Dielectric Response in Time-Frequency Domain
title_full Transformation Algorithm of Dielectric Response in Time-Frequency Domain
title_fullStr Transformation Algorithm of Dielectric Response in Time-Frequency Domain
title_full_unstemmed Transformation Algorithm of Dielectric Response in Time-Frequency Domain
title_sort transformation algorithm of dielectric response in time-frequency domain
publisher Hindawi Limited
series Mathematical Problems in Engineering
issn 1024-123X
1563-5147
publishDate 2014-01-01
description A transformation algorithm of dielectric response from time domain to frequency domain is presented. In order to shorten measuring time of low or ultralow frequency dielectric response characteristics, the transformation algorithm is used in this paper to transform the time domain relaxation current to frequency domain current for calculating the low frequency dielectric dissipation factor. In addition, it is shown from comparing the calculation results with actual test data that there is a coincidence for both results over a wide range of low frequencies. Meanwhile, the time domain test data of depolarization currents in dry and moist pressboards are converted into frequency domain results on the basis of the transformation. The frequency domain curves of complex capacitance and dielectric dissipation factor at the low frequency range are obtained. Test results of polarization and depolarization current (PDC) in pressboards are also given at the different voltage and polarization time. It is demonstrated from the experimental results that polarization and depolarization current are affected significantly by moisture contents of the test pressboards, and the transformation algorithm is effective in ultralow frequency of 10−3 Hz. Data analysis and interpretation of the test results conclude that analysis of time-frequency domain dielectric response can be used for assessing insulation system in power transformer.
url http://dx.doi.org/10.1155/2014/547105
work_keys_str_mv AT jiliu transformationalgorithmofdielectricresponseintimefrequencydomain
AT daningzhang transformationalgorithmofdielectricresponseintimefrequencydomain
AT xinlaowei transformationalgorithmofdielectricresponseintimefrequencydomain
AT hamidrezakarimi transformationalgorithmofdielectricresponseintimefrequencydomain
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