Thevenin Equivalent Method for Dynamic Contingency Assessment

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A method that exploits Thevenin equivalent representation for obtaining post-contingency steady-state nodal voltages is integrated with a method of detecting post-contingency aperiodic small-signal instability. The task of integrating stability assessment with contingency assessment is challenged by the cases of unstable post-contingency conditions. For unstable postcontingency conditions there exists no credible steady-state which can be used for basis of a stability assessment. This paper demonstrates how Thevenin Equivalent methods can be applied in algebraic representation of such bifurcation points which may be used in assessment of post-contingency aperiodic small-signal stability. The assessment method is introduced with a numeric example.
Original languageEnglish
Title of host publicationProceedings of IEEE Power & Energy Society's General Meeting 2015
Number of pages5
Publication date2015
ISBN (Print)978-1-4673-8040-9
Publication statusPublished - 2015
Event2015 IEEE PES General Meeting - Denver, CO, United States
Duration: 26 Jul 201530 Jul 2015


Conference2015 IEEE PES General Meeting
CountryUnited States
CityDenver, CO


  • Power system analysis computing
  • Power system stability
  • Thevenin equivalent
  • Algorithms

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