Voltage Scheduling Droop Control for State-of-Charge Balance of Distributed Energy Storage in DC Microgrids

Chendan Li, Tomislav Dragicevic, Nelson Leonardo Diaz Aldana, Juan Carlos Vasquez, Josep M. Guerrero

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

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Abstract

Due to higher power quality, lower conversion loss, and more DC loads, there has been an increasing awareness on DC microgrid. Previous emphasis has been on equal power sharing among different units in the DC microgrid, while
overlooking the coordination of the energy storage units to maintain the State-of-Charge balance. In this paper, a new droop method based on voltage scheduling for State-of-Charge balance is proposed to keep the SoC balance for the energy storage units. The proposed method has the advantage of avoiding the stability problem existed in traditional methods based on droop gain
scheduling. Simulation experiment is taken in Matlab on a DC microgrid with two distributed energy storage units. The simulation results show that the proposed method has successfully achieved SoC balance during the load changes while
maintaining the DC bus voltage within the allowable range.
Original languageEnglish
Title of host publicationProceedings of the 2014 IEEE International Energy Conference (ENERGYCON)
Number of pages5
PublisherIEEE Press
Publication dateMay 2014
Pages1310-1314
ISBN (Print)978-1-4799-2449-3
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

  • Voltage Scheduling
  • State-of-Charge Balance
  • Energy Storage
  • DC Microgrids

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  • Cite this

    Li, C., Dragicevic, T., Aldana, N. L. D., Vasquez, J. C., & Guerrero, J. M. (2014). Voltage Scheduling Droop Control for State-of-Charge Balance of Distributed Energy Storage in DC Microgrids. In Proceedings of the 2014 IEEE International Energy Conference (ENERGYCON) (pp. 1310-1314 ). IEEE Press. I E E E International Energy Conference. ENERGYCON proceedings https://doi.org/10.1109/ENERGYCON.2014.6850592