Chinese Journal of Electrical Engineering ›› 2021, Vol. 7 ›› Issue (4): 60-77.doi: 10.23919/CJEE.2021.000038

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Stability and Robustness of a Coupled Microgrid Cluster Formed by Various Coupling Structures

S.M.Ferdous, Farhad Shahnia*, GM Shafiullah   

  1. Discipline of Engineering and Energy, Murdoch University, Perth 6150, Australia
  • Received:2021-10-02 Revised:2021-11-12 Accepted:2021-11-23 Online:2021-12-25 Published:2022-01-07
  • Contact: *E-mail: F.Shahnia@Murdoch.edu.au
  • About author:S.M.Ferdous received the Bachelor's and Master degrees from the Islamic University of Technology, Bangladesh, in 2009 and 2012, the Erasmus Mundus Joint Master's degree from University of Nottingham, the University of Oviedo, the Sapienza University of Rome, and Politecnico de Coimbra in 2015. He has completed his PhD studies at Murdoch University, Australia in 2021. He has authored 50 refereed published book chapters, journal articles, and conference papers in the areas of application of power electronics in microgrids, distribution networks, renewable energy and electric drives.
    Farhad Shahnia received the PhD degree from the Queensland University of Technology, Brisbane, Australia, in 2012. He is currently an Associate Professor with Murdoch University, Perth, Australia. He has published 250 books, book chapters, journal articles and conference papers in the area of application and control of power electronic converters in distribution systems and microgrids.
    GM Shafiullah received the Bachelor degree of Engineering from the Chittagong University of Engineering Technology, Bangladesh, and the Master and PhD degrees from the Central Queensland University, Australia, in 2009 and 2013. He is currently a Senior Lecturer at Murdoch University, Perth, Australia. He has authored 120 book chapters, journal articles, and conference papers in the areas of power systems, smart grid and renewable energy.

Abstract: A standalone microgrid (MG) may frequently experience overloading owing to insufficient power generation or excessive renewable-based generation, which can cause unacceptable voltage and frequency deviations. Such problems are conventionally alleviated by load-shedding or renewable curtailment. Alternatively, autonomously operating MGs can be provisionally connected to facilitate temporary power exchange. The power-exchange link among the MGs can be of different types, e.g., three-phase ac, single-phase ac, or dc-link and power electronic converter-interfaced. All these topologies can facilitate power exchange, but they differ with regard to stability and robustness. In the present study, the stability and robustness of such structures are investigated, and the effects of factors such as the length of the interconnecting line among the MGs, the amount of power supplied to the troubled MGs, and the number of coupled MGs are compared. The stability and robustness of the structures are evaluated in Matlab.

Key words: Microgrid, coupled microgrids, stability, robustness