高频隔离型准Z源逆变器的建模与分析
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摘要
为了研究高频隔离型准Z源逆变器的内在特性及Z源网络各器件对其动态性能的影响。对高频隔离型准Z源逆变器在电流连续模式下,采用状态空间平均法对该逆变器直流侧建模,再利用小信号扰动获得控制与输出的传递函数,为高频隔离型准Z源逆变器设计控制策略提供理论依据。由于传递函数存在右半平面零点,说明逆变器具有非最小相位输出的特性。利用控制与输出的传递函数研究高频隔离型准Z源无源组件对系统零极点的影响,进而研究对系统动态性能的影响。通过Saber软件进行仿真验证所建立模型的正确性和分析的合理性。
To study the effect of the inherent characteristics of high-frequency isolated quasi-Z source inverter and the Z-source network devices on the inverter's dynamic performance, state space averaging method is used in a continuous current mode to model the inverter on its DC side. Afterwards, small signal perturbation is used to obtain the control and output transfer function, which provides a theoretical basis for the design and control strategy for the highfrequency isolated quasi-Z source inverter. The transfer function exists at the right-half-plane zero, indicating that the inverter has the characteristics of non-minimum phase output. The control and output transfer function is used to study the influence of the high-frequency isolated quasi-Z source passive components on the system's zero-pole, and further study their influence on the system's dynamic performance. The correctness of the established model and the rationality of the analysis are simulated and verified by software Saber.
To study the effect of the inherent characteristics of high-frequency isolated quasi-Z source inverter and the Z-source network devices on the inverter's dynamic performance, state space averaging method is used in a continuous current mode to model the inverter on its DC side. Afterwards, small signal perturbation is used to obtain the control and output transfer function, which provides a theoretical basis for the design and control strategy for the highfrequency isolated quasi-Z source inverter. The transfer function exists at the right-half-plane zero, indicating that the inverter has the characteristics of non-minimum phase output. The control and output transfer function is used to study the influence of the high-frequency isolated quasi-Z source passive components on the system's zero-pole, and further study their influence on the system's dynamic performance. The correctness of the established model and the rationality of the analysis are simulated and verified by software Saber.
引文
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[19]王博,陈万强,李祥阳.电液舵机系统的建模及模型验证研究[J].重庆理工大学学报:自然科学版,2015,29(12):133-137.Wang Bo,Chen Wanqiang,Li Xiangyang.Modeling and electro-hydraulic steering system model validation studies[J].Journal of Chongqing University of Technology:Natural Science,2015,29(12):133-137(in Chinese).
[2]李媛,彭方正.Z源/准Z源逆变器在光伏并网系统中的电容电压恒压控制策略[J].电工技术报,2011,26(5):63-69.Li Yuan,Peng Fangzheng.Constant capacitor voltage control strategy for Z-Source/Quasi-Z-Source inverter in gridconnected photovoltaic systems[J].Transactions of China Electrotechnical Society,2011,26(5):63-69.
[3]李斌,刘洁,吴菲,等.准Z源逆变器升压控制策略研究[J].电子世界,2012(10):92-93.Li Bin,Liu Jie,Wu Fei,et al.Research on boost control strategy for quasi-Z-source inverter[J].The electronic world.2012(10):92-93.
[4]Vinnikov D,Roasto I.Quasi-Z-source-based isolated DC/DCconverters for distributed power generation[J].IEEE Transactions on Industrial Electronics,2011,58(1):192-201.
[5]Martinez C,Jalakas T,Vinikov D,et al.QZSI DC/DC converters in input-series output-parallel connection for distributed generation[J].International Symposium on Power Electronics,Electrical Drivers,Automation and Motion,2012:952-957.
[6]Loh P C,Gao Feng,Blaabjerg F.Embedded EZ-source inverters[C].IEEE Transcations on Industry Applications,2010,46(1):256-267.
[7]Gao Feng,Loh P C,Li D,et al.Asymmetrical and symmetrical embedded Z-source inverters[C].IET Power Electronics,2011,4(2):181-193.
[8]Li Ding,Loh P C,Zhu Miao,et a1.Cascaded trans-Z-source inverters[C].IEEE Transactions on Power Electronics,2011,1976-1980.
[9]Qian Wei,Peng Fangzheng,Cha Honnyong.Trans-Z-source inverters[C].IEEE Transactions on Power Electronics,2010,26(12):3453-3463.
[10]熊小伏,陈康,郑伟,等.基于最小二乘法的光伏逆变器模型辨识[J].电力系统保护与控制,2012,40(22):52-57.Xiong Xiaofu,Chen Kang,Zheng Wei,et al.Photovoltaic inverter model identification based on least squares method[J].Power System Protection and Control,2012,40(22):52-57.
[11]郑伟,熊小伏.基于Wiener模型的光伏并网逆变器模型辨识方法[J].中国电机工程学报,2013,33(36):18-26.Zheng Wei,Xiong Xiaofu.A model identification method for photovoltaic grid-connected inverters based on the Wiener model[J].Proceedings of the CSEE,2013,33(36):18-26.
[12]方宇,谢勇.电子镇流器中谐振逆变器建模方法研究[J].电力电子技术,2006,40(5):98-100.Fang Yu,Xie Yong.Modeling method for resonant inverter applied to electronic ballast[J].Power Electronics,2006,40(5):98-100.
[13]蔡春伟,曲延滨,盛况.准Z源逆变器的暂态建模与分析[J].电机与控制学报,2011,15(10):7-13.Cai Chunwei,Qu Yanbin,Sheng Kuang.Transient modeling and analysis of quasi-z-sources-inverter[J].Electric Machines and Control.2011,15(10):7-13.
[14]Li Yuan,Anderson J,Peng Fangzheng,et al.Quasi Zsource inverter for photovoltaic power generation systems[C].IEEE Applied Power Electronics Conference&Exposition,2009:918-924.
[15]丁永欢.高频隔离准Z源逆变器的研究与应用[D].南京:南京理工大学,2013.Ding Yong huan.Research on high frequency isolated Quasi-Z-source inverter and application[D].Nan Jing.Nanjing University of Science&Technology.2013.
[16]Ding Yonghuan,Li Lei,Liu Jiaojiao.High frequency transformer isolated cascaded Quasi-Z-Source inverter[C].Industrial Electronics&Applications,2012:792-796.
[17]Ding Yonghuan,Li Lei.Research and application of high frequency isolated Quasi-Z-Source inverter[J].Conference of the IEEE Industrial Electronics Society,2012:714-718.
[18]邵桂荣,苏世栋,詹平红.DC-DC开关变换器的动力学建模与稳定性分析[J].重庆理工大学学报:自然科学版,2010,24(11):93-96.Shao Guirong,Su Shidong,Zhan Pinghong.Dynamic modeling and stability studyof DC-DC switching converter[J].Journal of Chongqing University of Technology:Natural Science,2010,24(11):93-96(in Chinese).
[19]王博,陈万强,李祥阳.电液舵机系统的建模及模型验证研究[J].重庆理工大学学报:自然科学版,2015,29(12):133-137.Wang Bo,Chen Wanqiang,Li Xiangyang.Modeling and electro-hydraulic steering system model validation studies[J].Journal of Chongqing University of Technology:Natural Science,2015,29(12):133-137(in Chinese).