王帅;荆龙;吴学智;李金科;武文;王小星;杨海倩;

• 1:国家能源主动配电网技术研发中心(北京交通大学)
• 2:北京电动车辆协同创新中心(北京交通大学)

摘要(Abstract)：

在网压不平衡工况下,模块化多电平储能系统(modular multilevel converter energy storage system,MMCESS)如果以并网电流平衡为控制目标,虽然可以保证交流系统安全运行,但是会引起各相放电速度不同,导致子模块储能电池荷电状态(state of charge,SOC)的不均衡。为解决上述问题,首先对比分析了传统MMC和MMC-ESS的内部环流特性;然后分析了以并网电流平衡为目标的不平衡网压控制对电池SOC的影响;针对这一问题,提出了利用注入直流环流的控制策略,有效地实现了相间功率均衡,并论述了直流环流控制器参数对系统稳定性的影响;以各相电压跌落度为变量,绘制各相注入的直流环流占额定桥臂电流比例的三维图,针对不同跌落度分析了各相桥臂电流的变化,为设备器件选型提供了依据;最后,通过仿真和实验验证了理论分析的正确性及控制策略的可行性。

关键词(KeyWords)： 模块化多电平变流器;储能系统;不平衡网压;环流

Abstract:

Keywords:

基金项目(Foundation): 国家能源应用技术研究及工程示范项目(NY20150301)~~

作者(Author): 王帅;荆龙;吴学智;李金科;武文;王小星;杨海倩;

Email:

DOI: 10.13335/j.1000-3673.pst.2017.0021

参考文献(References)：

• [1]谭兴国,王辉,张黎,等.微电网复合储能多目标优化配置方法及评价指标[J].电力系统自动化,2014,38(8):7-14.Tan Xingguo,Wang Hui,Zhang Li,et al.Multi-objective optimization of hybrid energy storage and assessment indices in microgrid[J].Automation of Electric Power Systems,2014,38(8):7-14(in Chinese).
• [2]丁明,陈忠,苏建徽,等.可再生能源发电中的电池储能系统综述[J].电力系统自动化,2013,37(1):19-25.Ding Ming,Chen Zhong,Su Jianhui,et al.An overview of battery energy storage system for renewable energy generation[J].Automation of Electric Power Systems,2013,37(1):19-25(in Chinese).
• [3]韩雅帅,徐永海,曹炜,等.带储能系统的级联多电平逆变器的研究进展[J].电测与仪表,2016,53(11):25-31.Han Yashuai,Xu Yonghai,Cao Wei,et al.Research progress on the applications of CMC with energy storage system[J].Electrical Measurement&Instrumentation,2016,53(11):25-31(in Chinese).
• [4]D’Arco S,Piegari L,Qurran M S,et al.Battery charging for electric vehicles with modular multilevel traction drives[C]//7th IET International Conference on Power Electronics,Machines and Drives(PEMD 2014).Manchester,UK:IET,2014:1-6.
• [5]D’Arco S,Piegari L,Tricoli P.A modular converter with embedded battery cell balancing for electric vehicles[C]//Electrical System for Aircraft,Railway and Ship Propulsion(ESARS).Bologna,Italy:IEEE,2012:1-6.
• [6]Ciccarelli F,Del P A,Iannuzzi D.An ultra-fast charging architecture based on modular multilevel converters integrated with energy storage buffers[C]//2013 8th International Conference and Exhibition on Ecological Vehicles and Renewable Energies(EVER).Monte Carlo,Monaco:IEEE,2013:1-6.
• [7]吉宇.储能型模块化多电平变换器的关键技术研究[D].南京:东南大学,2015.
• [8]Spahic E,Reddy C P S S,Pieschel M,et al.Multilevel STATCOM with power intensive energy storage for dynamic grid stability frequency and voltage support[C]//Electrical Power and Energy Conference(EPEC).London,UK:IEEE,2015:73-80.
• [9]Ren Bin,Xu Yonghai,Lan Qiaoqian.A control method for battery energy storage system based on MMC[C]//2015 IEEE 2nd International Future Energy Electronics Conference(IFEEC).Taipei,CN:IEEE,2015:1-6.
• [10]张振华,冯涛.模块化多电平储能单元改善并网风电场稳定性研究[J].四川电力技术,2012,35(1):6-8.Zhang Zhenhua,Feng Tao.Study of used modular multilevel storage units to improve the stability of wind farms integrated to grid[J].Sichuan Electric Power Technology,2012,35(1):6-8(in Chinese).
• [11]赵新,金新民,杨捷,等.并网逆变器新型不平衡控制方案[J].电工技术学报,2014,29(S1):257-265.Zhao Xin,Jin Xinmin,Yang Jie,et al.Novel unbalanced control scheme of grid-connected inverter[J].Transactions of China Electritechnical Society,2014,29(S1):257-265(in Chinese).
• [12]Michail V,Nicolas C,Alfred R.Impact of grid asymmetries on the operation and capacitive energy storage design of modular multilevel converters[J].IEEE Transactions on Industrial Electronics,2015,62(11):6697-6707.
• [13]Lachi A.On modular multilevel converters-based batteries energy storage systems[C]//2015 IEEE 11th International Conference on Power Electronics and Drive Systems.Sydney,Australia:IEEE,2015:908-912.
• [14]Michail V,Alfred R.Analysis and control of modular multilevel converters with integrated battery energy storage[J].IEEE Transactions on Power Electronics,2015,30(1):163-175.
• [15]Ionut T,Munk-Nielsen S,Remus T.A new modular multilevel converter with integrated energy storage[C]//IECON 2011 37th Annual Conference on IEEE Industrial Electronics Society.Melbourne,Australia:IEEE,2011:1075-1080.
• [16]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(in Chinese).
• [17]武文,吴学智,荆龙,等.模块化多电平变流器子模块故障容错控制策略[J].电网技术,2016,40(1):11-18.Wu Wen,Wu Xuezhi,Jing Long,et al.A fault-tolerated control strategy for sub-module faults of modular multilevel converters[J].Power System Technology,2016,40(1):11-18(in Chinese).
• [18]周月宾,江道灼,郭捷,等.模块化多电平换流器子模块电容电压波动与内部环流分析[J].中国电机工程学报,2012,32(24):8-14.Zhou Yuebin,Jiang Daozhuo,Guo Jie,et al.Analysis of sub-module capacitor voltage ripples and circulating currents in modular multilevel converter[J].Proceedings of the CSEE,2012,32(24):8-14(in Chinese).