Su, J., Li, K. orcid.org/0000-0001-6657-0522, Xing, C. et al. (2 more authors) (2024) A simplified consensus-based distributed secondary control for battery energy storage systems in DC microgrids. International Journal of Electrical Power and Energy Systems, 155 (Part B). 109627. ISSN 0142-0615
Abstract
DC microgrids have become a promising solution for efficient and reliable integration of renewable energy sources (RESs), battery energy storage systems (BESSs) and loads. To simultaneously achieve average voltage regulation, accurate current-sharing and state-of-charge (SoC) balance, at least two state variables need to be transmitted between neighboring BESS nodes in conventional distributed secondary control. In this paper, a simplified consensus-based distributed secondary control for BESSs in DC microgrids is proposed with only one virtually defined state variable being transmitted, where a cascaded control framework consisting of an SoC controller and a voltage controller is used to regulate DC bus voltages. This virtual state variable combines BESS SoC and its converter output current, there is no need to change the control law when BESSs switch between charging/discharging modes. Once SoCs are balanced, SoC controller works as a current controller. With the proposed control strategy, the number of transmitted state variables and the complexity of controller design are significantly reduced. Stability and steady-state analysis are also conducted to confirm the effectiveness of the proposed control strategy. Finally, Simulink simulation and hardware-in-loop tests are presented to validate the proposed control strategy.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2023 Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
Keywords: | Distributed secondary control; SoC balance; Battery energy storage system; DC microgrids; Consensus algorithm |
Dates: |
|
Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Institute of Communication & Power Networks (Leeds) |
Funding Information: | Funder Grant number SP Transmission PLC Not Known Ofgem Not Known |
Depositing User: | Symplectic Publications |
Date Deposited: | 08 Nov 2023 10:02 |
Last Modified: | 08 Nov 2023 10:02 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.ijepes.2023.109627 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:205040 |