Wide area inter-area oscillation monitoring using fast nonlinear estimation algorithm

Deyu Cai, P. Regulski, M. Osborne, V. Terzija

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)


This paper presents the results of the development of Smart Grid transmission network applications in the Great Britain (GB) power system. A new Wide Area Monitoring System (WAMS) application for monitoring inter-area oscillations is developed. The core of this novel application is a fast nonlinear algorithm for the real-time estimation of the dominant inter-area oscillation mode, which processes GPS synchronized information obtained from Phasor Measurement Units (PMUs) installed in the power system. It is based on the Newton-Type Algorithm (NTA), an efficient parameter estimator. The paper focuses on the practical application of the new WAMS application: two data sets were tested, one based on computer simulations and the other based on real-life data records. The computer simulated oscillatory signals were obtained through dynamic simulations of the full GB power system model consisting of over 200 generators. The real-life data records used information collected by the FlexNet Wide Area Monitoring System (FlexNET-WAMS) installed in the GB network. Based on these data records, the features of inter-area oscillations in the GB network are drawn.

Original languageEnglish
Article number6509987
Pages (from-to)1721-1731
Number of pages11
JournalIEEE Transactions on Smart Grid
Issue number3
Publication statusPublished - 2013
Externally publishedYes


  • Inter-area oscillations
  • Newton type algorithm
  • nonlinear parameter estimation
  • wide area monitoring systems


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