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    Remnant life estimation of Power Transformer based on IFT and Acidity number of transformer oil

    Access Status
    Fulltext not available
    Authors
    Forouhari, S.
    Abu-Siada, Ahmed
    Date
    2015
    Type
    Conference Paper
    
    Metadata
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    Citation
    Forouhari, S. and Abu-Siada, A. 2015. Remnant life estimation of Power Transformer based on IFT and Acidity number of transformer oil, in Phung, T. and Blackburn, T. (ed), 2015 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM), Jul 19-22 2015. Sydney, NSW: IEEE Dielectrics and Electrical Insulation Society.
    Source Title
    International Conference on the Properties and Applications of Dielectric Materials
    Source Conference
    International Conference on the Properties and Applications of Dielectric Materials
    DOI
    10.1109/PSCE.2009.4840111
    ISBN
    978-1-4799-8902-7
    School
    Department of Electrical and Computer Engineering
    URI
    http://hdl.handle.net/20.500.11937/41935
    Collection
    • Curtin Research Publications
    Abstract

    Power transformer is a key asset in any electrical transmission or distribution network. As a significant number of the global power transformers have reached the end of their expected designed life, utilities have given more concern to transformer condition-based maintenance to extend transformer operational life span and to retain the highest viable efficiency of the asset. Transformer failure statistics indicate that most of failures occur before power transformers reach their expected operational life. Statistics also show that the main cause of transformer failures is attributed to the deterioration of dielectric insulation due to transformer ageing which is highly dependent on accumulated effects of moisture, temperature, Oxygen and acids in transformer oil. When paper insulation exhibits severe deterioration, it loses its tensile strength and its capability to withstand electrical faults significantly decreases. Interfacial tension and acid number of insulating oil are correlated with the number of years in which a transformer has been in service and are used as a signal for transformer oil reclamation. This paper introduces a new, simple and effective fuzzy logic-based model to estimate the remnant life of a power transformer based on the values of interfacial tension and acid number of power transformer insulating oil.

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