A Dual-Window DC Bus Interacting Method for DC Microgrids Hierarchical Control Scheme

Fulong Li, Zhengyu Lin, Zhongnan Qian, Jiande Wu, Wei Jiang

Research output: Contribution to journalArticle

Abstract

Hierarchical control schemes have been commonly employed in dc microgrid controls, which combine local control, dc bus voltage coordination, and communication links to guarantee smart operation of dc microgrids. Conventional dc bus voltage regulation cannot conduct signal exchange. Therefore, external communication links are usually needed for hierarchical control schemes. However, once the communication link fails, the hierarchical control system will lose its ability to coordinate the distributed power smartly. This paper proposed a dual-window dc bus interacting (DBI) method to exchange information between the distributed energy sources, for the situations where communication link fails or is not available. A small-scale dc microgrid experimental system was set up, and a simple master-slave control scheme was implemented without communication link to demonstrate the feasibility of the proposed DBI method for dc microgrid controls. The expandability and immunity of the proposed DBI method were also evaluated.

Original languageEnglish
Article number8645723
Pages (from-to)652 - 661
Number of pages10
JournalIEEE Transactions on Sustainable Energy
Volume11
Issue number2
Early online date20 Feb 2019
DOIs
Publication statusPublished - 1 Apr 2020

Bibliographical note

© 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

Funding: This work has received support from the U.K. EPSRC-UKRI Innovation
Fellowship scheme under grant No. EP/S001662/1, and the European Union’s
Horizon 2020 research and innovation programme under grant agreement No.
734796.

Keywords

  • DC bus interacting
  • DC microgrids
  • decentralized control
  • droop control

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