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  • Improving measurement techniques of power transformer insulation: A study of the intermolecular interactions between water and vegetable oil based dielectrics

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    Accepted Manuscript (AM)
    Author(s)
    Martin, Daniel
    Lelekakis, Nick
    Ekanayake, Chandima
    Saha, Tapan
    Ma, Hui
    Griffith University Author(s)
    Ekanayake, Chandima MB.
    Year published
    2013
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    Abstract
    The use of water activity probes immersed in the vegetable oil dielectric of a transformer requires a fresh look at the equations, and assumptions, behind the conversion of water activity to concentration of dissolved water. This is important because water negatively affects the effectiveness of insulation. A large volume of work has been performed on mineral oil based dielectrics to determine mathematical relationships. However, there is a lack of data on whether these relationships hold for vegetable oil. One example is the appropriateness of using the Henry's law coefficient of proportionality to calculate the concentration ...
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    The use of water activity probes immersed in the vegetable oil dielectric of a transformer requires a fresh look at the equations, and assumptions, behind the conversion of water activity to concentration of dissolved water. This is important because water negatively affects the effectiveness of insulation. A large volume of work has been performed on mineral oil based dielectrics to determine mathematical relationships. However, there is a lack of data on whether these relationships hold for vegetable oil. One example is the appropriateness of using the Henry's law coefficient of proportionality to calculate the concentration of water dissolved in the fluid from its water activity. This paper presents research investigating the water activity-concentration relationship for one vegetable oil dielectric. It was found that, at room temperature under the prescribed conditions, using Henry's law is appropriate.
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    Conference Title
    2013 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP 2013) Proceedings
    DOI
    https://doi.org/10.1109/CEIDP.2013.6748239
    Copyright Statement
    © 2013 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.
    Subject
    Electrical and Electronic Engineering not elsewhere classified
    Publication URI
    http://hdl.handle.net/10072/338857
    Collection
    • Conference outputs

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