光伏水泵系统中Z源逆变器的应用研究
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摘要
针对传统光伏水泵系统中逆变器存在桥臂易直通、开关管和驱动电路数量多、电力电子器件易受电磁干扰损坏等问题,采用Z源逆变器替代传统的Boost变换器。文中具体分别搭建基于Boost变换器的传统光伏水泵系统和基于Z源逆变器的光伏水泵系统的仿真模型,进一步对比两种系统的升压能力、调速性能和工作效率。结果表明,Z源逆变器直流侧最大超调电压减少了150 V,输出转矩稳态误差和波动明显减小,运行效率提高了10%。基于Z源逆变器光伏水泵系统比传统光伏水泵系统具有更好的性能。
Traditional photovoltaic pump system has many problems in the working process,such as power electronic devices will damage when the upper and lower switch bridge arm short-circuit,the system need a lot of switch tubes and drive circuit and power electronic devices are vulnerable to electromagnetic interference of external factors of problem.Z source inverter is used to replace the traditional Boost converter.Specifically,the traditional photovoltaic pump system based on Boost converter and the photovoltaic pump system based on Z source inverter are built.In addition,comparison of the two systems of boost capacity,speed performance and efficiency shows that the maximum overshoot voltage of the DC side of the Z source inverter is reduced by 150 V,the steady-state error and the fluctuation of output torque are obviously reduced,and the operating efficiency is improved by 10%.The photovoltaic pump system based on Z source inverter has better performance than the traditional photovoltaic pump system.
Traditional photovoltaic pump system has many problems in the working process,such as power electronic devices will damage when the upper and lower switch bridge arm short-circuit,the system need a lot of switch tubes and drive circuit and power electronic devices are vulnerable to electromagnetic interference of external factors of problem.Z source inverter is used to replace the traditional Boost converter.Specifically,the traditional photovoltaic pump system based on Boost converter and the photovoltaic pump system based on Z source inverter are built.In addition,comparison of the two systems of boost capacity,speed performance and efficiency shows that the maximum overshoot voltage of the DC side of the Z source inverter is reduced by 150 V,the steady-state error and the fluctuation of output torque are obviously reduced,and the operating efficiency is improved by 10%.The photovoltaic pump system based on Z source inverter has better performance than the traditional photovoltaic pump system.
引文
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[2]Fang Zhengpeng.Z-source inverter[J].IEEE Transactions on Industry Applications,2003,39(2):504-510.
[3]Liu Jingbo,Hu Jiangang,Xu Longya.Dynamic modeling and analysis of Z source converter—derivation of AC small signal model and design-oriented analysis[J].IEEE Transactions on Power Electronics,2007,22(5):1786-1796.
[4]贺文涛.户用光伏水泵变频驱动电源的研制[D].合肥:合肥工业大学,2006.
[5]Minh Khai Nguyen,Young Cheol Lim,Sung Jun Park.Improved trans-Z-source inverter with continuous input current and boost inversion capability[J].IEEE Transactions on Power Electronics,2013,28(10):4500-4510.
[6]林涛,王彦章.双闭环逆变器控制策略仿真研究[J].电子科技,2014,27(7):121-125.
[7]Yang Yongheng,Blaabjerg F,Zou Zhixiang.Benchmarking of grid fault modes in single-phase grid-connected photovoltaic systems[J].IEEE Transactions on Industry Applications,2013,49(5):2167-2176.
[8]孙振,刘玉丛.电动汽车充电站Z源光伏并网发电装置[J].电子科技,2013,26(3):63-66.
[9]Knight J,Shirsavar S,Holderbaum W.An improved reliability cuk based solar inverter with sliding mode control[J].IEEE Transactions on Power Electronics,2006,21(4):1107-1115.
[10]Sira Ramírez H.Sliding motions in bilinear swithed networks[J].IEEE Transactions on Circuits and System,1987,CAS-34(8):919-933.
[11]Maity S,Tripathy D,Bhattaeharya T K,et al.Bifurcation analysis of PWM-1 voltage-mode-controlled buck convener using the exact discrete model[J].IEEE Transactions on Circuit and Systems I:Regular Papers,2007,54(5):1120-1130.
[12]Ortega R,Van Der Schaft A,Castanos F,et al.Control by interconnection and standard passivity-based control of porthamiltonian systems[J].IEEE Transactions on Automatic Control,2008,53(11):2527-2541.
[13]解娅楠.阻抗网络型并网逆变器的研究[D].哈尔滨:哈尔滨工业大学,2009.
[14]Ding Xinping,Qian Zhaoming,Yang Shuitao,et al.A direct peak DC-link boost voltage control strategy in Z-source inverter[C].Beijing:Applied Power Electronics Conference,APEC 2007-Twenty Second Annual IEEE,2007.
[15]陈中,顾春雷.基于Matlab按转子磁链定向矢量控制系统的仿真[J].合肥工业大学学报:自然科学版,2009(9):1331-1334.