Power system reduction techniques for planning and stability studies: A review

Lahiru Aththanayake, Nasser Hosseinzadeh, Ameen Gargoom, Hassan Haes Alhelou

Research output: Contribution to journalReview ArticleResearchpeer-review

2 Citations (Scopus)


It is well known that dynamic studies of large power systems are essential, and they are even more critical for interconnected systems that host high level of renewable energy systems which are interfaced with the grid through power electronic inverters. As power system stability studies need to be done frequently in large systems to adjust various control parameters, it is required to reduce the computational time of each study while maintaining the accuracy of studies. As such, it is desired that some preliminary studies be performed on simplified reduced size models before conducting final studies with full models. Creating reduced-size dynamic models is usually required for three applications: planning studies, online dynamic security assessment, and real-time simulators. As such, there is a need to review the conventional techniques of reducing the dynamic models of power networks and perform new research in developing techniques of incorporating aggregated dynamic models of renewable energy systems into the network reduction methods. The main contribution of this paper, in addition to a thorough review of power system reduction techniques, is the inclusion of new emerging components in modern power systems such as size reduction of Inverter-Based Generator models.

Original languageEnglish
Article number109917
Number of pages19
JournalElectric Power Systems Research
Issue numberPart A
Publication statusPublished - Feb 2024


  • Coherency
  • Distributed energy resources (DERs)
  • Inverter-based generators (IBGs)
  • Power system network reduction
  • Power system stability
  • Renewable energy systems (RESs)

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