On-Line transient stability evaluation by system decomposition-aggregation and high order derivatives

Daozhi Xia, G. T. Heydt

Research output: Contribution to journalArticle


An on-line transient stability evaluation method is presented in this paper. Under some classical assumptions, the change of generator rotor angles during the transient period is described by a set of second order differential equations. This set of equations is solved by single-step high order derivative explicit integration. A new system decomposition-aggregation technique is proposed to decompose the power system into subsystems and then to aggregate the subsystems by interconnection boundary conditions. Based on the aggregation model, the calculation of high-order derivatives is quite efficient to reduce the requirements of both computer memory and computational time for a large scale power system. The relation of memory and execution time requirements to the system decomposition is discussed.

Original languageEnglish (US)
Pages (from-to)30
Number of pages1
JournalIEEE Power Engineering Review
Issue number7
StatePublished - 1983
Externally publishedYes


ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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