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.
|Pages (from-to)||652 - 661|
|Number of pages||10|
|Journal||IEEE Transactions on Sustainable Energy|
|Early online date||20 Feb 2019|
|Publication status||Published - 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.
- DC bus interacting
- DC microgrids
- decentralized control
- droop control