Small-Signal Stability Analysis of an Inverter-Based Microgrid with Internal Model–Based Controllers

Stefan Leitner, Mehrdad Yazdanian, Ali Mehrizi-Sani, Annette Mütze

Research output: Contribution to journalArticlepeer-review


Several microgrid control strategies are proposed and studied in the literature. However, there are still gaps in improving their transient behavior and studying their stability. This paper uses small-signal analysis to explore the behavior of internal model-based current and voltage controllers by deriving a state-space model and performing eigenvalue and sensitivity analysis on an islanded inverter-based microgrid system. The results are compared with those of the same microgrid but with PI-based current and voltage controllers. Simulation case studies are performed in the PSCAD/EMTDC environment to compare the transient behavior of both methods. Results show that internal model-based controllers have superior eigenvalue patterns that lead to increased stability and improved transient behavior
Original languageEnglish
Pages (from-to)5393 - 5402
JournalIEEE Transactions on Smart Grid
Issue number5
Early online date2017
Publication statusPublished - 2018

Fields of Expertise

  • Sustainable Systems


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