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  • Examining the Ageing of Transformer Insulation Using FRA and FDS Techniques

    Author(s)
    Yousof, M.F.M.
    Ekanayake, Chandima
    Saha, Tapan
    Griffith University Author(s)
    Ekanayake, Chandima MB.
    Year published
    2015
    Metadata
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    Abstract
    Frequency response analysis (FRA) is a widely accepted testing technique to assess the mechanical condition of a power transformer. However, it has been reported that FRA is also sensitive to non-mechanical parameters such as the temperature and moisture content of the insulation. Therefore, further studies are required to investigate the ability of FRA on examining the transformer insulation condition. In this paper a study based on an insulation degradation of a single phase 5 kVA model transformer is presented. Throughout the accelerated insulation degradation process, FRA and Frequency Domain Dielectric Spectroscopy (FDS) ...
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    Frequency response analysis (FRA) is a widely accepted testing technique to assess the mechanical condition of a power transformer. However, it has been reported that FRA is also sensitive to non-mechanical parameters such as the temperature and moisture content of the insulation. Therefore, further studies are required to investigate the ability of FRA on examining the transformer insulation condition. In this paper a study based on an insulation degradation of a single phase 5 kVA model transformer is presented. Throughout the accelerated insulation degradation process, FRA and Frequency Domain Dielectric Spectroscopy (FDS) measurements are performed to analyze the degradation condition. Two methodologies are proposed to analyze the FRA results based on the relative change of capacitance and change of inter-winding capacitance. Results obtained from these approaches are verified with FDS analysis.
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    Journal Title
    IEEE Transactions on Dielectrics and Electrical Insulation
    Volume
    22
    Issue
    2
    DOI
    https://doi.org/10.1109/TDEI.2014.004695
    Subject
    Electrical and Electronic Engineering not elsewhere classified
    Electrical and Electronic Engineering
    Publication URI
    http://hdl.handle.net/10072/173020
    Collection
    • Journal articles

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