Core Magnetization Effects on the Frequency Response Analysis of Transformers Articles uri icon

publication date

  • June 2010

start page

  • 6

end page

  • 10

issue

  • 8

volume

  • 2010

international standard serial number (ISSN)

  • 0033-2097

abstract

  • The transformer frequency response analysis test can be influenced in the low frequency range by the presence of core ferromagnetic remaining magnetization, avoiding a further and precise analysis of the
    measured data. The first stage to avoid this effect is the magnetization
    identification, what is mainly made comparing different FRA traces at
    low frequency, where the core effects are visible and then the residual
    flux
    must be removed to obtain an adequate measurement, applying DC voltage
    following an experimental process explained in the article.