Integrated approach to dynamic and static voltage stability

C. Rajagopalan, P. W. Sauer, M. A. Pai

Research output: Contribution to conferencePaperpeer-review


The authors formulate voltage stability as a dynamic problem and show that the excitation systems plays a key role in determining voltage stability through the relevant eigenvalues of the linearized system's A matrix. Whereas in most studies using a linearized dynamic approach the electromechanical modes are of concern for stabilizing the system, it is shown in this study that the electrical variables associated with the excitation system play a dominant role. In the limiting case when there is no representation of the excitation system, the determinant of the load-flow Jacobian becomes the key determining factor. Under these conditions, Venikov's criterion is valid. The authors consider both the limited-Q and the unlimited-Q case, i.e., the Q limits on the reactive power generation.

Original languageEnglish (US)
Number of pages6
StatePublished - 1989
Externally publishedYes
EventProceedings of the 1989 American Control Conference - Pittsburgh, PA, USA
Duration: Jun 21 1989Jun 23 1989


OtherProceedings of the 1989 American Control Conference
CityPittsburgh, PA, USA

ASJC Scopus subject areas

  • General Engineering


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