Modeling, Stability Analysis and Active Stabilization of Multiple DC-Microgrids Clusters

Qobad Shafiee, Tomislav Dragicevic, Juan Carlos Vasquez, Josep M. Guerrero

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

50 Citations (Scopus)
2010 Downloads (Pure)

Abstract

DC microgrids (MGs), as an alternative option, have attracted increasing interest in recent years due to many potential advantages as compare to the ac system. Stability of these systems can be an important issue under high penetration of load converters which behaves as constant power loads (CPLs), and more especially during interconnection with other MGs, creating dc MG clusters. This paper develops a small signal model for dc MGs from the control point of view, in order to study stability analysis and investigate effects of CPLs and line impedances between the MGs on stability of these systems. This model can be also used to synthesis and study dynamics of control loops in dc MGs and also dc MG clusters. An active stabilization method is proposed to be implemented as a dc active power filter (APF) inside the MGs in order to not only increase damping of dc MGs at the presence of CPLs but also to improve their stability while connecting to the other MGs. Simulation results are provided to evaluate the developed models and demonstrate the effectiveness of proposed active stabilization technique.
Original languageEnglish
Title of host publicationProceedings of the 2014 IEEE International Energy Conference (ENERGYCON)
Number of pages7
PublisherIEEE Press
Publication dateMay 2014
Pages1284-1290
DOIs
Publication statusPublished - May 2014
Event2014 IEEE International Energy Conference (ENERGYCON) - Dubrovnik, Croatia
Duration: 13 May 201416 May 2014

Conference

Conference2014 IEEE International Energy Conference (ENERGYCON)
CountryCroatia
CityDubrovnik
Period13/05/201416/05/2014
SeriesI E E E International Energy Conference. ENERGYCON proceedings

Keywords

  • Microgrid (MG)
  • DC microgrid clusters
  • Constant power load
  • Stability analysis
  • Small signal model
  • Active damping methods

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    Shafiee, Q., Dragicevic, T., Vasquez, J. C., & Guerrero, J. M. (2014). Modeling, Stability Analysis and Active Stabilization of Multiple DC-Microgrids Clusters. In Proceedings of the 2014 IEEE International Energy Conference (ENERGYCON) (pp. 1284-1290 ). IEEE Press. I E E E International Energy Conference. ENERGYCON proceedings https://doi.org/10.1109/ENERGYCON.2014.6850588