Distributed Cooperative Optimal Control of DC Microgrids With Communication Delays

One of the fundamental and challenging issues in microgrids is to guarantee fairness of load sharing while realizing voltage regulation of distributed generations. In order to address this issue, a new multiobjective optimization problem with tunable weighting coefficients is first formulated for dc...

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Veröffentlicht in:IEEE transactions on industrial informatics Jg. 14; H. 9; S. 3924 - 3935
Hauptverfasser: Ding, Lei, Han, Qing-Long, Wang, Le Yi, Sindi, Eyad
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Piscataway IEEE 01.09.2018
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
Communication
Communication delay
Control systems
Cooperative control
Current distribution
dc microgrid
Decentralized control
Delay
Delays
Distributed generation
distributed optimal control
Electric power grids
Informatics
Load sharing
Microgrids
Multiple objective analysis
Optimal control
Optimization
Transmission line matrix methods
Voltage control
voltage regulation
ISSN:1551-3203, 1941-0050
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Zusammenfassung:One of the fundamental and challenging issues in microgrids is to guarantee fairness of load sharing while realizing voltage regulation of distributed generations. In order to address this issue, a new multiobjective optimization problem with tunable weighting coefficients is first formulated for dc microgrids. Second, a new distributed control scheme, which only requires local communications among neighbors, is proposed to solve the optimization problem. It is theoretically proved that the distributed control scheme can exponentially achieve the global optimal outputs of voltages and currents at distributed generations. Compared with a centralized control scheme, the proposed distributed control scheme provides remarkable advantages in improving reliability and scalability of microgrids. Third, the distributed control scheme is extended to accommodate a constant communication delay. The effects of the communication delay on the stability of microgrids are explicitly characterized. Finally, the performance of the proposed control schemes is evaluated by a modified six-bus microgrid with dc-powered trolleybus systems in terms of their convergence, robustness to load variations, plug-and-play functionality, tradeoff ability, and effects of communication delays.
Bibliographie:ObjectType-Article-1
SourceType-Scholarly Journals-1
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content type line 14
ISSN:1551-3203
1941-0050
DOI:10.1109/TII.2018.2799239