Enhanced measurement-based dynamic equivalence using coherency identification

Soobae Kim, Thomas J. Overbye

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Power system dynamic simulation demands substantial computation due to extensive interconnection among power systems. Traditionally, the computational burden has been reduced by using dynamic equivalent methodologies, such as modal, coherency and measurement-based. Measurement-based method replaces an external system with a simple equivalent and estimates its parameters through optimization method with measurement. However, the conventional method does not clearly present the model structure for the external equivalent. This ambiguity, then, may lead to poor performance of the equivalent. The proposed method uses generator equivalent model and shows how to choose a proper number of generators for the equivalent model structure using coherency concept. The approach preserves relevant modes from the external and thus enhances the simulation performance of the dynamic equivalent. Test results of a simple power system are presented and show a high level of accuracy of the proposed method.

Original languageEnglish (US)
Title of host publication2013 IEEE Power and Energy Conference at Illinois, PECI 2013
Pages200-205
Number of pages6
DOIs
StatePublished - May 21 2013
Event2013 IEEE Power and Energy Conference at Illinois, PECI 2013 - Champaign, IL, United States
Duration: Feb 22 2013Feb 23 2013

Publication series

Name2013 IEEE Power and Energy Conference at Illinois, PECI 2013

Other

Other2013 IEEE Power and Energy Conference at Illinois, PECI 2013
CountryUnited States
CityChampaign, IL
Period2/22/132/23/13

Keywords

  • Dynamic equivalent
  • Power system dynamic simulation
  • coherency identification
  • measurement-based method

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Fuel Technology

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