摘要
储能系统中通常通过串联多个储能单体得到更高的电压,但由于每个储能单体电压的不一致性会降低储能单元的利用率。针对以上问题,提出一种基于谐振变换器的串联储能单元均压控制策略。该均衡电路通过开关阵列与谐振变换器相互配合,实现任意单体之间和任意多单体之间的能量传递,且这两种能量传递模式均实现了零电流开关,减少了电路损耗。为获得最优均衡速度和均衡效率,采用K-Means聚类复合控制策略,优先对分组单元进行均衡,然后再进行单体间的均衡。最后,在Matlab/Simulink平台上对6个串联储能单体进行均衡仿真实验,实验结果表明,在静置均衡实验下,电压在24 min左右达到均衡,且均衡精度达到5 mV,均衡效率达到98.98%。与传统均压方法相比,该方法具有更快的均衡速度和更高的均衡效率。
In the energy storage system,higher voltage is usually obtained by connecting multiple energy storage monomers in series.However,the utilization of the energy storage unit could be reduced due to voltage variation of the energy storage monomers.To address above problem,a voltage equalization control strategy of series energy storage unit was proposed based on resonant converter.Through the interplay of the switching array and resonant converter,the equalization circuit can realize energy transfer between any monomer and any multi-monomers,and both of the two energy transfer modes can realize zero-current switching,which can reduce circuit loss.To obtain the optimal equalization speed and efficiency,K-Means clustering compound control strategy was adopted to prioritize the equalization of the grouping units,and the equalization was then carried out among the monomers.Finally,the equalization simulation of six series-connected energy storage monomers was carried out using Matlab/Simulink platform.The simulation results show that under the static equalization the voltage can reach equalization condition within about 24 min with accuracy of 5 mV and efficiency of 98.98%.Compared with traditional method,this equalization method has faster equalization speed and higher efficiency.
作者
王超
王翔宇
韩立
刘小虎
吴铁洲
WANG Chao;WANG Xiangyu;HAN Li;LIU Xiaohu;WU Tiezhou(Hubei Key Laboratory for High-Efficiency Utilization of Solar Energy and Operation Control of Energy Storage System,Hubei University of Technology,Wuhan 430068,China)
出处
《电子元件与材料》
CAS
北大核心
2024年第4期438-446,共9页
Electronic Components And Materials
基金
国家自然科学基金(51677058)
襄阳湖北工业大学产业研究院开放基金(XYYJ2022C02)。
