Research on Battery Self-Balancing Control Strategy in Cascade Energy Storage System
Ai Hongke1,Wu Junyong1,Hao Liangliang1,Feng Baoquan2,Zhang Jirui3,Zhang Jiao4
1. School of Electrical Engineering, Beijing Jiao Tong University Beijing 100044 China; 2. Beijing Energy Investment Ltd. Company Beijing 100022 China; 3. Beijing Jingneng Clean Energy Electrical Power Ltd. Company Beijing 100028 China; 4. Beijing Kerui Bodian Power Electronics Company Beijing 100083 China
Abstract:In terms of the imbalance problems of the state of charge of batteries in independent battery powered hybrid cascade energy storage system, this paper proposes a new control strategy, the difference charge or discharge, which based on Selective Harmonic Elimination PWM .When the state of charge of batteries is imbalanced, carry on difference charge or discharge to adjust the state of charge of batteries convergence .If balanced ,transfer to the synchronous charge or discharge by using phase shift SPWM .As a result, it improves the whole hybrid cascade storage system availability and capacity and prolongs the batteries' service life even that of the whole system . This paper derives the principle of difference charge or discharge control method and puts forward the switching condition .Its reasonable and feasibility are verified by an example of hybrid cascade energy storage system, from theoretical analyses in conjunction with model investigations established in PSCAD/EMTDC.
艾洪克,吴俊勇,郝亮亮,冯宝泉,张巨瑞,张皎. 级联式储能系统中电池自均衡控制策略研究[J]. 电工技术学报, 2015, 30(14): 442-449.
Ai Hongke,Wu Junyong,Hao Liangliang,Feng Baoquan,Zhang Jirui,Zhang Jiao. Research on Battery Self-Balancing Control Strategy in Cascade Energy Storage System. Transactions of China Electrotechnical Society, 2015, 30(14): 442-449.
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