Distributed Low Voltage Ride-Through Operation of Power Converters in Grid-Connected Microgrids under Voltage Sags

Xin Zhao, Lexuan Meng, Tomislav Dragicevic, Mehdi Savaghebi, Josep M. Guerrero, Juan Carlos Vasquez Quintero, Xiaohua Wu

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

6 Citations (Scopus)
466 Downloads (Pure)

Abstract

With the increasing penetration of renewable energy, microgrids (MGs) have gained a great attention over the past decade. However, a sudden cut out of the MGs due to grid fault may lead to adverse effects to the grid. As a consequence, reactive power injection provided by MGs is preferred since it can make the MG a contributor in smooth ride through the faults. In this paper, a reactive power support strategy using droop controlled converters is proposed to aid MG riding through three phase symmetrical voltage sags. In such a case, the MGs should inject reactive power to the grid to boost the voltage in all phases at AC common bus. However, since the line admittances from each converter to point of common coupling (PCC) are not identical, the injected reactive power may not be equally shared. In order to achieve low voltage ride through (LVRT) capability along with a good power sharing accuracy, a hierarchical control strategy is proposed in this paper. Droop control and virtual impedance is applied in primary control loop while secondary control loop is based on dynamic consensus algorithm (DCA). Experiments are conducted to verify the effectiveness of the proposed control strategy.
Original languageEnglish
Title of host publicationProceedings of the 41th Annual Conference of IEEE Industrial Electronics Society, IECON 2015
PublisherIEEE Press
Publication dateNov 2015
Pages001909 - 001914
ISBN (Electronic)978-1-4799-1762-4
DOIs
Publication statusPublished - Nov 2015
Event41th Annual Conference of IEEE Industrial Electronics Society, IECON 2015 - Yokohama, Japan
Duration: 9 Nov 201512 Nov 2015
Conference number: 35501XP

Conference

Conference41th Annual Conference of IEEE Industrial Electronics Society, IECON 2015
Number35501XP
CountryJapan
CityYokohama
Period09/11/201512/11/2015

Keywords

  • Microgrids
  • Dynamic consensus algorithm
  • Low voltage ride through
  • Droop control

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    Zhao, X., Meng, L., Dragicevic, T., Savaghebi, M., Guerrero, J. M., Quintero, J. C. V., & Wu, X. (2015). Distributed Low Voltage Ride-Through Operation of Power Converters in Grid-Connected Microgrids under Voltage Sags. In Proceedings of the 41th Annual Conference of IEEE Industrial Electronics Society, IECON 2015 (pp. 001909 - 001914). IEEE Press. https://doi.org/10.1109/IECON.2015.7392379