Air Core Transformer Winding Disk Deformation: A Precise Study on Mutual Inductance Variation and its Influence on Frequency Response Spectrum

M. Bagheri, S. Nezhivenko, B. T. Phung, T. Blackburn

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

It is well-known that deformation of transformer winding can produce detectable changes to the frequency response spectrum as compared to a referenced past measurement. To interpret such changes for diagnostic purposes, main causes of the trace deviation need to be recognized precisely. In addition, it is useful that interpretation of transformer frequency response is classified in a way that IoT-based techniques can be developed in the near future to analyze transformer mechanical integrity. This study has specifically concentrated on the inductance and capacitance variation due to the axial and radial disk deformation of transformer winding. Analytical analyses on self- and mutual-inductance variations are discussed and capacitance variation is studied in detail for symmetrical and asymmetrical transformer disk deformations. A numerical example is provided to establish the analytical approach and compare inductance and capacitance variation. The analytical approach is finally examined through experimental study of disk deformation in a 66 kV transformer winding.

Original languageEnglish
JournalIEEE Access
DOIs
Publication statusAccepted/In press - Nov 28 2017

Keywords

  • Axial deformation
  • Capacitance
  • Conductors
  • Deformable models
  • Frequency response
  • Frequency response analysis
  • Inductance
  • Radial deformation
  • Strain
  • Transformer winding deformation
  • Windings

ASJC Scopus subject areas

  • Computer Science(all)
  • Materials Science(all)
  • Engineering(all)

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