摘要
针对大规模锂离子蓄电池储能系统,提出具有两层均衡的模块化多目标并行有源能量均衡器。第一层均衡以蓄电池单元作为均衡目标,蓄电池单元内主控开关采用带死区互补导通控制,所有蓄电池单元可同时工作,均衡速度快且不受串联单体蓄电池数量的影响。第二层均衡由多组选通矩阵和一个具有能量双向且连续的有源均衡主电路组成,通过选通矩阵可并行实现多个不同蓄电池组的蓄电池单元的均衡放电或均衡充电,多目标并行均衡且均衡能量连续使得均衡速度加倍提升。从原理上对均衡器及控制策略进行分析,并搭建12个锂离子蓄电池串联组成的蓄电池储能系统实验平台进行实验验证。理论分析和实验结果均证明所提均衡器均衡速度快,均衡效率高,开关器件电压应力小,易模块化,可扩展性强。
For the large-scale lithium-ion battery energy storage system,a multi-objective parallel active energy equalizer with two-layer equilibrium is proposed.The first-layer equilibrium takes the battery unit as the equalization target.The main control switch in the battery unit adopts conduction control with dead-band complementary,all battery units can work at the same time,so the equilibrium speed is fast and is not affected by the number of single batteries connected in series.The second-layer equilibrium consists of multiple sets of gating matrix and the active equilibrium main circuit with two-way and continuous energy.Through the gating matrix,the equalizing discharge or equalizing charge of multiple battery units in different battery groups can be realized in parallel,the multi-objective parallel equilibrium and continuous equalizing energy make the equilibrium speed increase doubly.The equalizer and its control strategy are analyzed in principle,and the experimental platform of battery energy storage system with series 12 lithium-ion batteries is built for experimental verification.The theoretical analysis and experimental results show that the proposed equalizer has the advantages of fast equilibrium speed,high equilibrium efficiency,small voltage stress of switch device,easy modularity and strong expandability.
作者
刘红锐
张开翔
尹荣
钱晶
LIU Hongrui;ZHANG Kaixiang;YIN Rong;QIAN Jing(Faculty of Electric Power Engineering,Kunming University of Science and Technology,Kunming 650500,China;Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China)
出处
《电力自动化设备》
EI
CSCD
北大核心
2022年第2期41-47,共7页
Electric Power Automation Equipment
基金
国家自然科学基金资助项目(51967009,51869007)
云南省教育厅科学研究基金资助项目(2019J0038)。
关键词
大规模蓄电池
储能
有源能量均衡器
均衡效率
均衡速度
多目标并行均衡
large-scale batteries
energy storage
active energy equalizer
equilibrium efficiency
equilibrium speed
multi-objective parallel equilibrium
