Impacts of distributed generators on the oscillatory stability of interconnected power systems

Istemihan Genç*, Ömer Usta

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Integration of distributed generation is continually and gradually affecting the stability of interconnected power systems. In this paper, the impacts of distributed synchronous generators on oscillatory stability are studied. In various parameter sub-spaces of interest, feasibility regions can be calculated to determine the conditions to sustain the stable operation of an interconnected power system. Through computations of the feasibility boundaries corresponding to Hopf bifurcations of electromechanical oscillatory modes, we determine the operating limits for a stable operation of the system under small and continual disturbances such as predictable changes in loading conditions of generators. Thus, with the case studies given in the paper, under different operating conditions, we investigate the effects of distributed synchronous generators on the oscillatory small-signal stability. It has been shown that penetrations of these generators can cause local or inter-area oscillatory instabilities depending on the system's topology, operating point and control parameters.

Original languageEnglish
Pages (from-to)149-161
Number of pages13
JournalTurkish Journal of Electrical Engineering and Computer Sciences
Volume13
Issue number1
Publication statusPublished - 2005

Keywords

  • Distributed generation
  • Feasibility boundaries
  • Hopf bifurcation
  • Oscillatory stability

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