NDLI: Implementation of Multiple-Slack-Terminal DC Microgrids for Smooth Transitions Between Grid-Tied and Islanded States

Content Provider	IEEE Xplore Digital Library
Author	Jianfang Xiao Peng Wang Setyawan, L.
Copyright Year	2010
Abstract	Bidirectional interlinking converter (BIC) is normally configured as the slack terminal to regulate system bus voltage for dc microgrid operation in grid-tied state. In case of utility grid fault, BIC is disabled and the system changes to operate in islanded state. Localized battery energy storage (BES) voltage regulation mode (VRM) operation is activated to maintain system power balance. Operating mode changes of BES and BIC during islanding and reconnection might result in system voltage fluctuations and undesirable inrush current. Detailed transition procedure, which is crucial, has seldom been discussed in literature. In this paper, multiple-slack-terminal dc microgrid, in which both BIC and BES operate in VRM with droop control, is implemented to ensure smooth transitions between grid-tied and islanded states. BES operating mode change is eliminated, and thus, system bus voltage is actively regulated throughout the transitions. Contactor is installed at BIC dc side to decouple BIC operating mode change and grid connection. A counter is used to ensure bus voltages at both sides of contactor have been matched stably to minimize inrush current. To enhance system control accuracy, multilevel energy management system is carried out. A lab-scale dc microgrid has been developed for experimental verifications.
Starting Page	273
Ending Page	281
Page Count	9
File Size	1356918
File Format	PDF
ISSN	19493053
Volume Number	7
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2016-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Microgrids Voltage control Threshold voltage Batteries Energy management Power generation Surges multiple-slack-terminal DC microgrid energy management system (EMS) grid-tied islanded
Content Type	Text
Resource Type	Article
Subject	Computer Science

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