基于LC振荡电路的串联型VRB均衡控制策略  

Equalization Control Strategy for Series-connected Vanadium Redox Flow Batteries Based on LC Oscillation Circuit

作　　者：李鑫[1] 莫言青 邱亚[1] LI Xin;MO Yan-qing;QIU Ya(School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学电气与自动化工程学院,安徽合肥230009

出　　处：《控制工程》2022年第6期1098-1103,共6页Control Engineering of China

基　　金：2017年国家重点研发项目(2017YFB0903504);2016年湖南省科技重大专项类项目(2016GK1003);2016年山西省重点研发计划项目(201603D112004)。

摘　　要：针对串联型全钒液流电池组(S-VRBs)在运行过程中会导致电池有效使用容量降低、循环寿命缩短等问题,提出一种基于LC振荡电路的均衡控制策略。该策略利用电容电感储能使能量由高SOC单体电池向低SOC单体电池转移,研究不同LC电路参数和开关频率对均衡性能的影响,选择合适参数,并与传统电容型电路比较。将基于LC振荡电路的电池组模型在静置工况、充电工况以及放电工况下进行仿真分析。在MATLAB/Simulink上进行仿真对比验证,结果表明,该均衡控制策略均衡速度快,能量转移效率高,在充放电过程中能使不同性能的VRB单体SOC趋于一致,S-VRBs电压保持在某一分散度之下,能够有效地提高电池利用率及系统效率。In order to solve the problems of reduced battery capacity and shortened cycle life of seriesconnected vanadium redox flow batteries(S-VRBs)during operation,we propose an equalization control strategy based on LC oscillation circuit.This strategy uses capacitance and inductance to store energy,so that energy is transferred from a VRB with high SOC to a VRB with low SOC.In this paper,we study the effects of different parameters and switching frequency on equalization performance to select the appropriate parameters of the LC oscillation circuit,which is compared with a conventional capacitance type circuit.Then,battery model based on the LC oscillation circuit is simulated and analyzed under static condition,charging condition and discharge condition in the MATLAB/Simulink.The results show that the proposed strategy has fast equalization speed and high energy transfer efficiency.In the process of charging and discharging,the SOC of different VRBs tends to be consistent,and the voltage of S-VRBs can keep below a certain dispersion,which effectively improves battery utilization and system efficiency.

关 键 词：串联型全钒液流电池组(S-VRBs) LC振荡电路 能量转移 均衡控制 充放电 

分 类 号：TM911[电气工程—电力电子与电力传动]