Transformer core parameter identification using frequency response analysis

A. Shintemirov, W. H. Tang, Q. H. Wu

Research output: Contribution to journalArticlepeer-review

56 Citations (Scopus)


We present a novel model-based approach for parameter identification of a laminated core, such as magnetic permeability and electrical conductivity, of power transformers on the basis of frequency response analysis (FRA) measurements. The method establishes a transformer core model using the duality principle between magnetic and electrical circuits for parameter identification with genetic algorithms. We use reference input impedance frequency responses, calculated by a well-known lumped parameter model of a three-phase transformer and finite-element computations, to analyze identification accuracy of the method. The results verify the ability of the approach to accurately identify the core lamination parameters with respect to the reference values. The approach can be used for parameter identification of a demagnetized core with known geometrical parameters when the core lamination samples are unavailable for experimental tests. The approach can also be employed for transformer core modeling and FRA result interpretation at low frequencies.

Original languageEnglish
Article number5357511
Pages (from-to)141-149
Number of pages9
JournalIEEE Transactions on Magnetics
Issue number1
Publication statusPublished - Jan 2010


  • Frequency response analysis
  • Genetic algorithm
  • Magnetic-electric duality principle
  • Parameter identification
  • Transformer core

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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