NDLI: Distributed low voltage ride-through operation of power converters in grid-connected microgrids under voltage sags

Content Provider	IEEE Xplore Digital Library
Author	Xin Zhao Lexuan Meng Dragicevic, T. Savaghebi, M. Guerrero, J.M. Vasquez, J.C. Xiaohua Wu
Copyright Year	2015
Description	Author affiliation: Sch. of Autom., Northwestern Polytech. Univ., Xi'an, China (Xiaohua Wu) \|\| Dept. of Energy Technol., Aalborg Univ., Aalborg, Denmark (Xin Zhao; Lexuan Meng; Dragicevic, T.; Savaghebi, M.; Guerrero, J.M.; Vasquez, J.C.)
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.
Sponsorship	IEEE
Starting Page	001909
Ending Page	001914
File Size	342057
Page Count	6
File Format	PDF
e-ISBN	9781479917624
DOI	10.1109/IECON.2015.7392379
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-11-09
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Reactive power Voltage control Voltage fluctuations Heuristic algorithms Impedance Low voltage Microgrids dynamic consensus algorithm microgrids droop control low voltage ride through
Content Type	Text
Resource Type	Article

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