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    Detection of Power Transformer Bushing Faults and Oil Degradation using Frequency Response Analysis

    228174_228174.pdf (646.1Kb)
    Access Status
    Open access
    Authors
    Hashemnia, Seyednaser
    Abu-Siada, Ahmed
    Islam, Syed
    Date
    2015
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Hashemnia, N. and Abu-Siada, A. and Islam, S. 2015. Detection of Power Transformer Bushing Faults and Oil Degradation using Frequency Response Analysis. IEEE Transactions on Dielectrics and Electrical Insulation. 23 (1): pp. 222-229.
    Source Title
    IEEE Transactions on Dielectrics and Electrical Insulation
    DOI
    10.1109/TDEI.2015.005032
    ISSN
    1070-9878
    School
    Department of Electrical and Computer Engineering
    Remarks

    Copyright © 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

    URI
    http://hdl.handle.net/20.500.11937/12404
    Collection
    • Curtin Research Publications
    Abstract

    Frequency response analysis (FRA) has been globally accepted as a reliable tool to detect mechanical deformation within power transformers. However, because of its reliance on graphical analysis, interpretation of FRA signature is still a challenging area that calls for skilled personnel, as so far, there is no widely accepted reliable standard code for FRA signature identification and quantification. While several papers investigating the impact of various mechanical winding deformations on the transformer FRA signature can be found in the literature, no attention was given to investigate the impact of various bushing faults and transformer oil degradation on the FRA signature. This paper introduces a detailed simulation and practical analyses to elaborate the impact of bushing faults as well as transformer oil degradation on the transformer FRA signature. In this regard, the physical geometrical dimension of a three phase power transformer is simulated using 3D finite element analysis to emulate the real transformer operation. Various bushing faults have been emulated on the studied model and oil degradation is implemented through changing oil permittivity. Practical FRA test is conducted on a three phase 132kV, 35MVA power transformer to validate the simulation results. Results show that bushing faults and oil degradation can be visibly detected through FRA signature.

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      Frequency Response Analysis (FRA) is the most reliable technique for detecting a mechanical failure within electrical power transformers. Associated literature reports the ability of the FRA technique to identify ...
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