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Title: Control of cascaded DC-DC converter-based hybrid battery energy storage systems-Part I: stability issue
Authors: Mukherjee, Nilanjan
Strickland, Dani
Keywords: Cascaded dc-dc converters
Hybrid battery energy storage systems
Issue Date: 2015
Publisher: © IEEE
Citation: MUKHERJEE, N. and STRICKLAND, D., 2015. Control of cascaded DC-DC converter-based hybrid battery energy storage systems-Part I: stability issue. IEEE Transactions on Industrial Electronics, 63 (4), pp. 2340-2349.
Abstract: There is an emerging application, which uses a mixture of batteries within an energy storage system. These hybrid battery solutions may contain different battery types. A dc-side cascaded boost converters along with a module-based distributed power sharing strategy has been proposed to cope with variations in battery parameters such as, state-of-charge (SOC) and/or capacity. This power sharing strategy distributes the total power among the different battery modules according to these battery parameters. Each module controller consists of an outer voltage-loop with an inner current-loop where the desired control reference for each control-loop needs to be dynamically varied according to battery parameters to undertake this sharing. As a result, the designed control bandwidth (BW) or stability margin of each module control-loop may vary in a wide range, which can cause a stability problem within the cascaded converter. This paper reports such a unique issue and thoroughly investigates the stability of the modular converter under the distributed sharing scheme. The paper shows that a cascaded PI control-loop approach cannot guarantee the system stability throughout the operating conditions. A detailed analysis of the stability issue and the limitations of the conventional approach are highlighted. Finally in-depth experimental results are presented to prove the stability issue using a modular hybrid battery energy storage system prototype under various operating conditions.
Description: © 2015 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.
Sponsor: This work was supported in part by the Engineering and Physical Sciences Research Council (EPSRC), U.K., under Grant EP/1008764/1 and Grant EP/137649.
Version: Accepted for publication
DOI: 10.1109/TIE.2015.2509911
URI: https://dspace.lboro.ac.uk/2134/24960
Publisher Link: http://dx.doi.org/10.1109/TIE.2015.2509911
ISSN: 0278-0046
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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