Advanced power system fault analysis method

J. M. Undrill, T. E. Kostyniak

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


This paper describes the capabilities and mathematical basis of an advanced fault analysis program. This program handles simultaneous unbalanced fault analysis with detailed treatment of shunt branches, off-nominal transformers, and loading conditions as given by a base case load flow solution. Provision is made for large groups of branches with common mutual coupling. The program uses the diakoptic (piecewise) solution method to allow each sequence network to be handled independently, even though they are effectively interconnected by unbalanced faults. Efficient computer implementation is based on the optimally ordered triangular factorization of the individual sequence admittance matrices within the diakoptic procedure, and an efficient iterative method of handling mutual couplings. Copyright š 1975 by The Institute of Electrical and Electronics Engineers, Inc.

Original languageEnglish (US)
Pages (from-to)2141-2150
Number of pages10
JournalIEEE transactions on power apparatus and systems
Issue number6
StatePublished - 1975
Externally publishedYes

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Engineering(all)
  • Electrical and Electronic Engineering


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