Applying a robust control technique to damp low frequency oscillations in the WECC

Anamitra Pal, James S. Thorp, Santosh S. Veda, V. A. Centeno

Research output: Contribution to journalArticlepeer-review

37 Scopus citations


This paper demonstrates the application of a robust technique for damping low frequency oscillations in the WECC. The control is designed by extending the logic of SMA and integrating it with the LMI technique to develop a single-gain feedback controller that is capable of damping oscillations in large systems. It is an integrated form of control because it combines different controllers together so as to prevent any negative interaction between the individual controls. The proposed technique is initially applied to an equivalent model of the WECC system developed in MATLAB and then transferred to a larger and more detailed version created in PSLF. The controllers initially used for the design are the two HVDC lines and an SVC. Three ESDs are added to the model for the improvement of the control. The results indicate that the technique proposed in this paper provides adequate damping to the relevant modes of oscillations and that it can be easily applied to large and complex power system networks.

Original languageEnglish (US)
Pages (from-to)638-645
Number of pages8
JournalInternational Journal of Electrical Power and Energy Systems
Issue number1
StatePublished - Jan 2013
Externally publishedYes


  • Energy Storage Devices (ESDs)
  • Inter-area oscillations
  • Linear Matrix Inequalities (LMIs)
  • Polytopic design
  • Selective modal analysis (SMA)
  • Wide Area Measurements (WAMs)

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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