A Novel Method to Design Delay-Scheduled Controllers for Damping Inter-Area Oscillations

Rasoul Asghari, Babak Mozafari, Mohammad Salay Naderi, Turaj Amraee, Venera Nurmanova, Mehdi Bagheri

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


The main problem of time delay in application of remote signals is that it limits the contribution of the controller devices in damping inter-area oscillations, thus to overcome this problem, we proposed a new time delayed controller in this paper. The controller takes the advantage of delay as a design parameter to solve the SVC contribution limitation problem resulting from delays in feedback loops. To determine the delay and controller parameters, an algorithm is proposed to minimize the rightmost real part of the electromechanical oscillation modes in the design stage such that the system robustness against small variations of time delay is provided. The feasibility of the proposed method is evaluated by conducting a number of simulations on the standard four-machine and 16-machine 68-bus test power systems. The results reveal that compared to the existing methods, the proposed method not only exhibits a better damaging performance, but also introduces a significant delay margin in a certain range of feedback delays.

Original languageEnglish
Article number8509578
Pages (from-to)71932-71946
Number of pages15
JournalIEEE Access
Publication statusAccepted/In press - Jan 1 2018


  • Control systems
  • Delay differential-algebraic equations
  • Delay effects
  • Delay range stability
  • Delays
  • Large-scale power systems
  • Mathematical model
  • Oscillators
  • Power system stability
  • Spectral abscissa
  • Stability analysis

ASJC Scopus subject areas

  • Computer Science(all)
  • Materials Science(all)
  • Engineering(all)

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