Negative Sequence Droop Method based Hierarchical Control for Low Voltage Ride-Through in Grid-Interactive Microgrids

Xin Zhao, Mehdi Savaghebi Firoozabadi, Juan Carlos Vasquez Quintero, Josep M. Guerrero, Kai Sun, Xiaohua Wu, Guoliang Chen, Libing Sun

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

4 Citations (Scopus)
53 Downloads (Pure)

Abstract

In highly microgrid (MG) integrated distribution systems, problems such as a sudden cut out of the MGs due to grid faults may lead to adverse effects to the grid. As a consequence, ancillary services provided by MGs are preferred since it can make the MG a contributor to ride through the faults. In this paper, a voltage support strategy based on negative sequence droop control, which regulate the positive/negative sequence active and reactive power flow by means of sending proper voltage reference to the inner control loop, is proposed for the grid connected MGs to ride through voltage sags under complex line impedance conditions. In this case, the MGs should inject a certain amount of positive and negative sequence power to the grid so that the voltage quality at load side can be maintained at a satisfied level. A two layer hierarchical control strategy is proposed in this paper. The primary control loop consists of voltage and current inner loops, conventional droop control and virtual impedance loop while the secondary control loop is based on positive/negative sequence droop control which can achieve power injection under voltage sags. Experimental results with asymmetrical voltage sags are conducted to verify the effectiveness of the proposed control strategy.
Original languageEnglish
Title of host publicationProceedings of the 2015 IEEE Energy Conversion Congress and Exposition (ECCE)
Number of pages8
PublisherIEEE Press
Publication dateSep 2015
Pages6896 - 6903
ISBN (Print)978-1-4673-7151-3
DOIs
Publication statusPublished - Sep 2015
Event2015 IEEE Energy Conversion Congress and Exposition (ECCE) - Montreal, Canada
Duration: 20 Sep 201524 Sep 2015

Conference

Conference2015 IEEE Energy Conversion Congress and Exposition (ECCE)
CountryCanada
CityMontreal
Period20/09/201524/09/2015

Keywords

  • Microgrid
  • Low voltage ride through
  • Negative sequence droop control
  • Ancillary services

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  • Projects

    MeTER_Demo: Microgrid Technology Research and Demonstration

    Guerrero, J. M., Wu, D., Guan, Y., Vasquez, J. C. & Savaghebi, M.

    01/04/201431/03/2017

    Project: Research

    Cite this

    Zhao, X., Firoozabadi, M. S., Quintero, J. C. V., Guerrero, J. M., Sun, K., Wu, X., Chen, G., & Sun, L. (2015). Negative Sequence Droop Method based Hierarchical Control for Low Voltage Ride-Through in Grid-Interactive Microgrids. In Proceedings of the 2015 IEEE Energy Conversion Congress and Exposition (ECCE) (pp. 6896 - 6903 ). IEEE Press. https://doi.org/10.1109/ECCE.2015.7310626