Control of the Distributed Hybrid Energy Storage System Considering the Equivalent SOC

dc.contributor.authorJiang, Weien
dc.contributor.authorXu, Zhiqien
dc.contributor.authorYu, Binen
dc.contributor.authorSun, Keen
dc.contributor.authorRen, Kaien
dc.contributor.authorDeng, Yifanen
dc.contributor.authorRahman, Saifuren
dc.description.abstractA hybrid energy storage system (HESS) consists of two or more types of energy storage components and the power electronics circuit to connect them. Therefore, the real-time capacity of this system highly depends on the state of the system and cannot be simply evaluated with traditional battery models. To tackle this challenge, an equivalent state of charge (ESOC) which reflects the remaining capacity of a HESS unit in a specific operation mode, is proposed in this paper. Furthermore, the proposed ESOC is applied to the control of the distributed HESS which contains several units with their own local targets. To optimally distribute the overall power target among these units, a sparse communication network-based hierarchical control framework is proposed. This framework considers the distributed control and optimal power distribution in the HESS from two aspects - the power output capability and the ESOC balance. Based on the primary droop control, the total power is allocated according to the maximum output capacity of each unit, and the secondary control is used to adjust the power from the perspective of ESOC balance. Therefore, each energy storage unit can be controlled to meet the local power demand of the microgrid. Simulation results based on MATLAB/Simulink verify the effectiveness of the application of the proposed equivalent SOC.</p>en
dc.description.notesThis work was supported by the National Natural Science Foundation of China under Grant 51877041.en
dc.description.sponsorshipNational Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [51877041]en
dc.description.versionPublished versionen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.subjectconsistency algorithmen
dc.subjectvariable droop coefficienten
dc.subjecthybrid energy storage systemen
dc.subjectstate of chargeen
dc.subjecthierarchical control structureen
dc.titleControl of the Distributed Hybrid Energy Storage System Considering the Equivalent SOCen
dc.title.serialFrontiers in Energy Researchen
dc.typeArticle - Refereeden
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