Transformation Algorithm of Dielectric Response in Time-Frequency Domain
Joint Authors
Liu, Ji
Zhang, Daning
Wei, Xinlao
Karimi, Hamid Reza
Source
Mathematical Problems in Engineering
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-06-01
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Abstract EN
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.
American Psychological Association (APA)
Liu, Ji& Zhang, Daning& Wei, Xinlao& Karimi, Hamid Reza. 2014. Transformation Algorithm of Dielectric Response in Time-Frequency Domain. Mathematical Problems in Engineering،Vol. 2014, no. 2014, pp.1-7.
https://search.emarefa.net/detail/BIM-480427
Modern Language Association (MLA)
Liu, Ji…[et al.]. Transformation Algorithm of Dielectric Response in Time-Frequency Domain. Mathematical Problems in Engineering No. 2014 (2014), pp.1-7.
https://search.emarefa.net/detail/BIM-480427
American Medical Association (AMA)
Liu, Ji& Zhang, Daning& Wei, Xinlao& Karimi, Hamid Reza. Transformation Algorithm of Dielectric Response in Time-Frequency Domain. Mathematical Problems in Engineering. 2014. Vol. 2014, no. 2014, pp.1-7.
https://search.emarefa.net/detail/BIM-480427
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-480427