Hierarchical Control for Multiple DC-Microgrids Clusters

Qobad Shafiee, Tomislav Dragicevic, Juan Carlos Vasquez, Josep M. Guerrero

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

18 Citations (Scopus)
1134 Downloads (Pure)


DC microgrids (MGs) have gained research interest during the recent years because of many potential advantages as compared to the ac system. To ensure reliable operation of a low-voltage dc MG as well as its intelligent operation with
the other DC MGs, a hierarchical control is proposed in this paper. In this hierarchy, primary control level is used to regulate the common bus voltage inside each MG locally. A voltage secondary control (VSC) is designed to eliminate the dc bus voltage deviation produced by primary level while guarantees proper operation of tertiary level. This secondary control acts
not only as a central controller for the each MG individually, but also as a decentralized controller when dc MGs are connected together. This way, VSC maintains the dc bus voltage around the voltage reference using an averaging method. This allows the power flow control to be achieved at the same time since it can be accomplished only at the cost of having the voltage deviation
inside the system. Neighboring communication is employed to exchange the voltage output of MGs to the neighbors using low bandwidth communication (LBC) network. Finally, a power flow control (PFC) is proposed to control the tie-line current between the MGs. The effectiveness of the proposed scheme is verified through detailed hardware-in-the-loop (HIL) simulations.
Original languageEnglish
Title of host publicationProceedings of the 11th International Multi-Conference on Systems, Signals and Devices, SSD 2014
Number of pages6
PublisherIEEE Press
Publication dateFeb 2014
Publication statusPublished - Feb 2014
Event11th International Multiconference on Systems, Signals & Devices - Castelldefels, Spain
Duration: 11 Feb 201414 Feb 2014


Conference11th International Multiconference on Systems, Signals & Devices

Fingerprint Dive into the research topics of 'Hierarchical Control for Multiple DC-Microgrids Clusters'. Together they form a unique fingerprint.

Cite this