Winding Frequency Response Analysis for Power Transformers

  • W. H. Tang
  • Q. H. Wu
Part of the Power Systems book series (POWSYS)


Nowadays, FRA has received great attention for transformer winding condition assessment, which has gradually replaced the conventional LVI method. It provides higher sensitivity to changes occurring in a transformer winding compared with the LVI method and can be performed relatively easily on-site. In this chapter, first the origin of FRA and the definition of FRA transfer functions are introduced. Two FRA methods, i.e. the impulse response method and the SFRA method, are presented alongside a typical experimental test setup for FRA. Then a brief literature review of winding models is given, which can be used for analytical calculations and circuit simulations for windings. The rest of this chapter focusses on FRA comparison techniques and the interpretation of frequency response measurements regarding various types of winding faults.


Frequency Response Residual Magnetisation Frequency Response Analysis Deformation Fault Frequency Response Measurement 
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Copyright information

© Springer-Verlag London Limited  2011

Authors and Affiliations

  1. 1.Department of Electrical Engineering and ElectronicsThe University of LiverpoolLiverpoolUK

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