单相升降压型五电平逆变器拓扑及控制
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摘要
通过分析现有五电平逆变器拓扑的优缺点,提出一种具有升降压能力的五电平逆变器拓扑。相对于传统的多电平逆变器,新升降压型五电平逆变器具有能够实现升降压、拓扑简单、易于实现控制、功率器件少、开关损耗小等优点。在载波层叠调制策略下,对所提逆变器进行开环仿真,证明拓扑的升降压能力。基于传统的PR控制方法,对所提逆变器进行闭环设计并仿真。为了提高并网电流的质量,采用模型预测控制算法来对逆变器进行并网控制,通过仿真证明理论分析的正确性。并将这种控制方法与传统PR控制方法进行对比,突出模型预测的优越性。最后,基于该逆变器拓扑进行部分开环及闭环实验,验证了拓扑的可行性。
In this paper, a new single-phase five-level inverter topology with buck-boost capability is proposed by analyzing the advantages and disadvantages of the existing five-level inverter topology. Compared with the traditional multilevel inverter topology, the new Buck-Boost five-level inverter has the advantages of enabling buck-boost, simple topology, easy control, less power devices,and low switching losses. Under the carrier cascade modulation strategy, an open loop simulation was performed on the new inverter to verify the Buck-Boost capability. Based on the PR control, the closed-loop design of the new inverter was performed and verified by simulation. In order to improve the quality of the grid-connected current, the model predictive control algorithm was used to control the inverter, and Matlab simulation was performed to verify the correctness of the theoretical analysis.Compared with the traditional PR control methods, this control method has the advantage of model prediction. Finally, the open-loop and closed-loop experiments have verified the new inverter topology.
In this paper, a new single-phase five-level inverter topology with buck-boost capability is proposed by analyzing the advantages and disadvantages of the existing five-level inverter topology. Compared with the traditional multilevel inverter topology, the new Buck-Boost five-level inverter has the advantages of enabling buck-boost, simple topology, easy control, less power devices,and low switching losses. Under the carrier cascade modulation strategy, an open loop simulation was performed on the new inverter to verify the Buck-Boost capability. Based on the PR control, the closed-loop design of the new inverter was performed and verified by simulation. In order to improve the quality of the grid-connected current, the model predictive control algorithm was used to control the inverter, and Matlab simulation was performed to verify the correctness of the theoretical analysis.Compared with the traditional PR control methods, this control method has the advantage of model prediction. Finally, the open-loop and closed-loop experiments have verified the new inverter topology.
引文
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[19]柳志飞,杜贵平,杜发达.有限集模型预测控制在电力电子系统中的研究现状和发展趋势[J].电工技术学报,2017,32(22):58-69.Liu Zhifei,Du Guiping,Du Fada.Research status and development trend of finite set model predictive control in power electronic systems[J].Transactions of China Electrotechnical Society,2017,32(22):58-69.
[20]Xia Changliang,Liu Tao,Shi Tingna,et al.Asimplified finite-control-set model-predictive control for power converters[J].IEEE Transactions on Industrial Informatics,2017,10(2):991-1002.
[21]Narimani M,Wu B,Yaramasu V,et al.Finite control-set model predictive control(FCS-MPC)of nested neutral point-clamped(NNPC)converter[J]IEEE Transactions on Power Electronics,2015,30(12):7262-7269.
[22]殷实,谭国俊.MMC简化有限集快速模型预测控制[J].电力电子技术,2015,49(11):60-62.Yin Shi,Tan Guojun.MMC simplified fast model predictive control for finite sets[J].Power Electronics Technology,2015,49(11):60-62.
[2]何凯益,任磊,邓翔,等.混合H桥级联逆变器的优化调制[J].电工技术学报,2016,31(14):193-200.He Kaiyi,Ren Lei,Deng Xiang,et al.Modified modulation of H-bridge hybrid cascaded inverters[J].Transactions of China Electrotechnical Society,2016,31(14):193-200.
[3]王立乔,王欣,仇雷.一种新型单级非隔离双Cuk逆变器[J].中国电机工程学报,2014,34(6):846-854.Wang Liqiao,Wang Xin,Qiu Lei.A novel single stage non-isolated dual Cuk inverter[J].Proceedings of the CSEE,2014,34(6):846-854.
[4]Nami A,Liang J,Dijkhuizen F,et al.Modular multilevel converters for HVDC applications:review on converter cells and functionalities[J].IEEETransactions on Power Electronics,2015,30(1):18-36.
[5]Yu Y,Konstantinou G,Hredzak B,et al.Operation of cascaded H-bridge multilevel converters for largescale photovoltaic power plants under bridge failures[J].IEEE Transactions on Industrial,2015,62(11):7228-7236.
[6]张亮,陈国栋,朱纪洪,等.H桥级联型多电平高压调速系统低速畸变补偿控制技术[J].电工技术学报,2017,32(22):13-21.Zhang Liang,Chen Guodong,Zhu Jihong,et al.Distortion compensation control designed for H-bridge cascade multi-level converter under low speed condition[J].Transactions of China Electrotechnical Society,2017,32(22):13-21.
[7]刘苗,洪峰,尹培培,等.复合型级联双Buck飞跨电容五电平逆变器[J].电工技术学报,2015,30(18):35-42.Liu Miao,Hong Feng,Yin Peipei,et al.A hybrid cascaded dual Buck flying-capacitor five-level inverter[J].Transactions of China Electrotechnical Society,2015,30(18):35-42.
[8]王奎,郑泽东,许烈,等.混合钳位型四电平和五电平逆变器拓扑结构和控制策略[J].电工技术学报,2018,33(2):353-360.Wang Kui,Zheng Zedong,Xu Lie,et al.The topologies and control of hybrid-clamped four-level and five-level inverters[J].Transactions of China Electrotechnical Society,2018,33(2):353-360.
[9]Uthirasamy R,Ragupathy U S,Chinnaiyan V K,et al.Experimentation of Boost chopper interfaced cascaded multilevel inverter topology for photovoltaic applications[J].International Review of Electrical Engineering,2014,9(1):16-25.
[10]Law K H,Dahidah M S A.DC-DC Boost converter based MSHE-PWM cascaded multilevel inverter control for STATCOM systems[M].Japan:Hirushima2014.
[11]Abd Rahim N,Mohamad Elias M F,Hew W P.Transistor-clamped H-bridge based cascaded multilevel inverter with new method of capacitor voltage balancing[J].IEEE Transactions on Industrial Electronics,2013,60(8):2943-2956.
[12]Gao Fei.An enhanced single-phase step-up five-level inverter[J].IEEE Transactions on Power Electronics,2016,31(12):8024-8030.
[13]艾永乐,陈博,李自清,等.基于调制比优化的单相逆变器主谐波滤除研究[J].电力系统保护与控制,2018,46(10):130-134.Ai Yongle,Chen Bo,Li Ziqing,et al.Research on single phase inverter main harmonic filter based on modulation ratio optimization[J].Power System Protection and Control,2018,46(10):130-134.
[14]郭忠南,张纯江,李福林,等.基于鲁棒电流下垂控制的不同容量逆变器并联控制研究[J].燕山大学学报,2017,41(2):133-141.Gou Zhongnan,Zhang Chunjiang,Li Fulin,et al.Power control of paralleled inverters with different power ratings based on robust current droop control[J].Journal of Yanshan University,2017,41(2):133-141.
[15]杨兴武,冀红超,甘伟.基于模型预测控制的并网逆变器开关损耗优化方法[J].电力自动化设备,2015,35(8):84-89.Yang Xingwu,Ji Hongchao,Gan Wei.Optimization method of switching loss in grid-connected inverter based on model predictive control[J].Electric Power Automation Equipment,2015,35(8):84-89.
[16]Sebaaly F,Vahedi H,Kanaan H Y,et al.Finite control set model predictive controller for grid connected inverter design[C]//IEEE International Conference on Industrial Technology,Taipei,Taiwan,China,2016:1208-1213.
[17]马临超,蒋炜华,薛宝星.NPC型三电平永磁同步风力发电并网逆变器模型预测控制满足低电压穿越要求研究[J].电力系统保护与控制,2017,45(16):151-156.Ma Linchao,Jiang Weihua,Xue Baoxing.Model predictive current control of grid-connected neutralpoint-clamped permanent magnet synchronous wind power inverters to meet low-voltage ride-through requirements[J].Power System Protection and Control,2017,45(16):151-156.
[18]贾冠龙,李冬辉,姚乐乐.改进有限集模型预测控制策略在三相级联并网逆变器中的应用[J].电网技术,2017,41(1):245-250.Jia Guanlong,Li Donghui,Yao Lele.Application of improved finite set model predictive control strategy in three-phase cascaded grid-connected inverter[J].Power System Technology,2017,41(1):245-250.
[19]柳志飞,杜贵平,杜发达.有限集模型预测控制在电力电子系统中的研究现状和发展趋势[J].电工技术学报,2017,32(22):58-69.Liu Zhifei,Du Guiping,Du Fada.Research status and development trend of finite set model predictive control in power electronic systems[J].Transactions of China Electrotechnical Society,2017,32(22):58-69.
[20]Xia Changliang,Liu Tao,Shi Tingna,et al.Asimplified finite-control-set model-predictive control for power converters[J].IEEE Transactions on Industrial Informatics,2017,10(2):991-1002.
[21]Narimani M,Wu B,Yaramasu V,et al.Finite control-set model predictive control(FCS-MPC)of nested neutral point-clamped(NNPC)converter[J]IEEE Transactions on Power Electronics,2015,30(12):7262-7269.
[22]殷实,谭国俊.MMC简化有限集快速模型预测控制[J].电力电子技术,2015,49(11):60-62.Yin Shi,Tan Guojun.MMC simplified fast model predictive control for finite sets[J].Power Electronics Technology,2015,49(11):60-62.