Flexible Battery Energy Storage System and Control Strategy Based on Half-Bridge Cascade Technology
Cui Qiang1, Wang Qingjun2, Tong Yibin1, Wang Zuoxing1, Tang Quan1
1. National Active Distribution Network Technology Research Center Beijing Jiaotong University Beijing 100044 China; 2. CRRC Xi’an Yonge Electric Co. Ltd Xi’an 710018 China;
Abstract：For secondary utilization of retired power battery, the flexible battery energy storage system based on half-bridge cascade topology was studied in this paper and the control strategy was also proposed. This topology can realize high voltage output by adopting half-bridge cascaded technology, and also can achieve the none-master-slave control mode, which has many advantages of simple structure, high equivalent switching frequency, and easy control. To meet the needs of energy storage system, the modules adopt the droop control strategy independently and are managed by central computer to solve the system stability problem that is caused by sampling error in traditional current control strategy. Topology and control strategy of the proposed system was analyzed in detail, simulation and experiment results were present to verify that the system can realize the power control and equilibrium control among modules and that the system is suitable for the secondary use of battery.
崔强,王庆军,童亦斌,王作兴,唐泉. 基于半桥级联的电池柔性成组储能系统及控制策略[J]. 电工技术学报, 2019, 34(5): 954-962.
Cui Qiang, Wang Qingjun, Tong Yibin, Wang Zuoxing, Tang Quan. Flexible Battery Energy Storage System and Control Strategy Based on Half-Bridge Cascade Technology. Transactions of China Electrotechnical Society, 2019, 34(5): 954-962.
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2019, Vol. 34 
