Improved computation of core inductance for fast transient analysis of transformers

P. Gómez, F. De León, F. P. Espino-Cortés

Research output: Contribution to journalArticlepeer-review


This letter introduces a simple and accurate formula for the computation of the inductance component due to the flux inside the transformer core for fast transient analysis. When compared with an existing formula, the new formula yields considerably better behavior for a broad frequency range (1 Hz to 10 MHz). In addition, two finite-element method approaches for core inductance computation at different frequencies are evaluated and compared: flux linkage and method of energy. It is demonstrated that these methods can provide substantially different results at high frequencies.

Original languageEnglish (US)
Article number6842673
Pages (from-to)2034-2036
Number of pages3
JournalIEEE Transactions on Power Delivery
Issue number4
StatePublished - Aug 2014


  • Fast transients
  • magnetic fields
  • transformer

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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