基于半桥级联的电池柔性成组储能系统及控制策略
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摘要
针对退运电池梯次利用,建立了基于半桥级联型拓扑的电池柔性成组储能系统架构,并提出了与之相适应的控制策略。储能拓扑采用半桥级联的方式实现高压输出,模块间采用无主从独立控制,具有模块化设计、结构简单、等效开关频率高、控制简单等优点。根据储能系统需求,模块采用基于下垂控制的电流控制策略,由上位机统一指令,各模块独立执行,解决了传统直接电流控制由于采样误差造成的系统难以正常工作的问题。该文进行了理论分析和仿真验证,并搭建了三模块级联实验平台,验证了基于下垂控制的电流控制策略的可行性,实现了功率控制及模块间均衡控制,所建储能系统适用于梯次电池利用。
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.
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.
引文
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[18]徐殿国,李彬彬,周少泽.模块化多电平高压变频技术研究综述[J].电工技术学报,2017,32(20):104-116.Xu Dianguo,Li Binbin,Zhou Shaoze.Overview of the modular multilevel converter based high voltage motor drive[J].Transactions of China Electrotechnical Society,2017,32(20):104-116.
[2]Mukherjee N,Sterickland D,Cross A,et al.Reliability estimation of second life battery system power electronic topologies for grid frequency response applications[C]//Proceedings of the 6th International Conference Power Electronics,Machines and Drives,Bristol,UK,2012:1-6.
[3]马伟强,张彩萍.梯次利用车用电池储能系统初探[J].科技视界,2012(30):70-71.
[4]Neubauer J,Pesaran A.The ability of battery second use strategies to impact plug-in electric vehicle prices and serve utility energy storage applications[J].Journal of Power Sources,2011,196(23):10315-10358.
[5]姚勇,朱桂萍,刘秀成.电池储能系统在改善微电网电能质量中的应用[J].电工技术学报,2012,27(1):85-89.Yao Yong,Zhu Guiping,Liu Xiucheng.Improvement of power quality of micro-grids by battery energy storage system[J].Transactions of China Electrotechnical Society,2012,27(1):85-89.
[6]吴文宣.大型电池储能电站保护的配置方案研究[J].电力系统保护与控制,2012,40(18):144-148,155.Wu Wenxuan.Study on configuration scheme of bulk battery energy storage plant’s protection[J].Power System Protection and Control,2012,40(18):144-148,155.
[7]张倩.电池柔性成组储能系统监控平台和系统控制[D].北京:北京交通大学,2017.
[8]赵宇.基于电池柔性成组技术的储能变流器研究[D].北京:北京交通大学,2016.
[9]李楠,高峰.电池储能型模块化多电平变换器的混合模型预测控制方法[J].电工技术学报,2017,32(14):165-174.Li Nan,Gao Feng.A hybrid model predictive control method for modular multilevel converter of battery energy storage system[J].Transactions of China Electrotechnical Society,2017,32(14):165-174.
[10]许赟,邹云屏,丁凯.一种改进型级联多电平拓扑及其频谱分析[J].电工技术学报,2011,26(4):77-85.Xu Yun,Zou Yunping,Ding Kai.Topology and spectral analysis of an improved hybrid cascade multilevel converter[J].Transactions of China Electrotechnical Society,2011,26(4):77-85.
[11]李响,郭希铮,游小杰,等.一种改进的级联H桥整流器直流电压平衡策略[J].电工技术学报,2017,32(4):66-75.Li Xiang,Guo Xizheng,You Xiaojie,et al.An advanced DC voltage balance strategy for cascaded H-bridge rectifier[J].Transactions of China Electrotechnical Society,2017,32(4):66-75.
[12]Montesinos-Miracle D,Massot-Campos M,BergasJane J,et al.Design and control of a modular multilevel DC/DC converter for regenerative applications[J].IEEE Transactions on Power Electronic,2013,28(8):3970-3979.
[13]李善颖,吴涛,任彬,等.基于模块化多电平变换器的储能系统综述[J].电力系统保护与控制,2015,43(16):139-146.Li Shanying,Wu Tao,Ren Bin,et al.Review of energy storage system based on modular multilevel converter[J].Power System Protection and Control,2015,43(16):139-146.
[14]刁伟萍.电池柔性成组储能系统能量利用率分析及优化控制[D].北京:北京交通大学,2017.
[15]Hafez A A A.Seven-level three phase cascaded H-bridge inverter with a single DC source[J].ARPNJournal of Engineering and Applied Sciences,2012,7(12):1546-1554.
[16]Porselvi T,Muthu R.Multi-level cascaded DC/DCconverters for PV applications[J].Alexandria Engineering Journal,2015,54(4):1135-1146.
[17]Mukherjee N.Control of second-life hybrid battery energy storage system based on modular boostmultilevel buck converter[J].IEEE Transactions on Industrial Electronics,2015,62(2):1034-1046.
[18]徐殿国,李彬彬,周少泽.模块化多电平高压变频技术研究综述[J].电工技术学报,2017,32(20):104-116.Xu Dianguo,Li Binbin,Zhou Shaoze.Overview of the modular multilevel converter based high voltage motor drive[J].Transactions of China Electrotechnical Society,2017,32(20):104-116.