Power-system stabilizer (PSS) design by probabilistic sensitivity indexes (PSIs)

C. Y. Chung, K. W. Wang, C. T. Tse, R. Niu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

69 Citations (Scopus)


A probabilistic power system stabilizer (PSS) design considering multioperating conditions is proposed in this paper. Under the assumption of normal distribution, the conventional eigenvalue sensitivity analysis is extended to probabilistic environment by describing the statistical nature of eigenvalues as expectations and variances. Two probabilistic indexes derived from the sensitivities of eigenvalue expectations and variances are introduced to the PSS site and parameter selection. The robustness of the system can be guaranteed because wide range of the load variation has been taken into account in probabilistic representation. The effectiveness of the proposed PSS is demonstrated on a 3-machine system by probabilistic eigenvalue analysis and transient response simulation.

Original languageEnglish
Pages (from-to)688-693
Number of pages6
JournalIEEE Transactions on Power Systems
Issue number3
Publication statusPublished - Aug 2002


  • Eigenvalue
  • Power system stabilizer (PSS)
  • Residue index
  • Sensitivity and probability

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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