State-of-charge balancing control strategy of battery energy storage system based on modular multilevel converter

State-of-charge balancing control strategy of battery energy storage system based on modular multilevel converter
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DOI：
10.1109/ecce.2014.6953744
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发表时间：
2014-09
期刊：
2014 IEEE Energy Conversion Congress and Exposition (ECCE)
影响因子：
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通讯作者：
F. Gao;Lei Zhang;Qi Zhou;Mengxing Chen;Tao Xu;Shaogang Hu
F. Gao;Lei Zhang;Qi Zhou;Mengxing Chen;Tao Xu;Shaogang Hu
中科院分区：
其他
文献类型：
--
作者：
F. Gao;Lei Zhang;Qi Zhou;Mengxing Chen;Tao Xu;Shaogang Hu

文献摘要

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This paper proposed a novel battery energy storage system based on modular multilevel converter (MMC), which has several merits compared with two-level and cascaded multilevel battery energy storage systems. The proposed system can manage the state-of-charges (SOCs) of all batteries to be equal to avoid the overcharge or over discharge of single battery stack as traditional. Besides, the inherent power exchange characteristics using circulating current could increase the control flexibility for SOC balancing, and improve output waveform quality, maximize storage capacity and reduce internal losses. The key issues regarding injected dc current control, SOC balancing control and circulating current control are discussed in this paper. Finally, the proposed system were verified through Matlab/Simulink simulation and a scaled down experiment prototype.