5kW单相非隔离逆变器的研制
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摘要
针对采用传统PI和比例谐振PR控制的并网逆变器对电网干扰信号的抑制能力较弱问题,提出了一种基于准PR控制策略的单相并网逆变器控制方案,并针对自行研制的一种可大规模用于家庭供电的体积小、成本低的单相非隔离5kW逆变器进行了仿真研究和并网实验。从硬件和软件两方面阐述了逆变器的设计原理;采用Matlab软件中的S-Function函数进行了仿真分析,控制策略为准PR控制,将其与传统的PI和PR控制器进行了对比,并在仿真基础上用实验样机进行了实验验证。研究结果表明,所提出的准PR控制策略在消除稳态误差、提高网侧电流品质和抗电网干扰等方面,相较于PI和PR控制具有很大的优越性,不仅可以更好地实现无静差控制,且具有可扩展性。凭借准PR控制器的无静差特性,单相非隔离5kW逆变器在家用供电系统中将具有广阔的应用前景。
Aiming at the weaker suppression ability of grid-connected inverters with traditional PI and proportional resonance PR control,a single-phase grid-connected inverter control scheme based on quasi-PR control strategy is proposed.A smallscale,low-cost single-phase non-isolated 5 kW inverter that can be used for large-scale power supply at home has been simulated and connected to the grid.The design principle of the inverter is expounded from two aspects of hardware and software.The simulation analysis is carried out by using the S-Function function in Matlab software.The control strategy is based on quasiPR control and compared with the traditional PI and PR controllers.Based on the simulation,the experimental verification is carried out with an experimental prototype.The research results show that the proposed quasi-PR control strategy has great advantages compared with PI and PR control in eliminating steady-state error,improving grid-side current quality and resisting grid interference.Not only can it be better to achieve no static control,but also has scalability.With the static-free characteristics of the quasi-PR controller,the single-phase non-isolated 5 kW inverter will have broad application prospects in the home power supply system.
Aiming at the weaker suppression ability of grid-connected inverters with traditional PI and proportional resonance PR control,a single-phase grid-connected inverter control scheme based on quasi-PR control strategy is proposed.A smallscale,low-cost single-phase non-isolated 5 kW inverter that can be used for large-scale power supply at home has been simulated and connected to the grid.The design principle of the inverter is expounded from two aspects of hardware and software.The simulation analysis is carried out by using the S-Function function in Matlab software.The control strategy is based on quasiPR control and compared with the traditional PI and PR controllers.Based on the simulation,the experimental verification is carried out with an experimental prototype.The research results show that the proposed quasi-PR control strategy has great advantages compared with PI and PR control in eliminating steady-state error,improving grid-side current quality and resisting grid interference.Not only can it be better to achieve no static control,but also has scalability.With the static-free characteristics of the quasi-PR controller,the single-phase non-isolated 5 kW inverter will have broad application prospects in the home power supply system.
引文
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[15]祝龙记,张旭立.光伏并网逆变器LCL陷波校正滤波器[J].电工技术学报,2012,27(9):237-241.ZHU Longji,ZHANG Xuli.LCL notch correction filter for photovoltaic grid-connected inverter[J].Transactions of China Electrotechnical Society,2012,27(9):237-241.
[16]王飞,吴健芳,王红波.基于准比例谐振控制单相并网逆变器的研究[J].电气开关,2017,55(3):55-58.WANG Fei,WU Jianfang,WANG Hongbo.Research on single-phase grid-connected inverter based on quasi-proportional resonance control[J].Electrical Switch,2017,55(3):55-58.
[17]刘艳萍,赵腾,张进东.STM32的CPLD离线烧写系统设计[J].新器件新技术,2015,44(2):60-63.LIU Yanping,ZHAO Teng,ZHANG Jindong.Design of CPLD offline programming system for STM32[J].New Devices,New Technology,2015,44(2):60-63.
[18]张犁,孙凯,冯兰兰,等.一种低漏电流六开关非隔离全桥光伏并网逆变器[J].中国电机工程学报,2012(15):1-7.ZHANG Li,SUN Kai,FENG Lanlan,et al.A low leakage current six-switch non-isolated full-bridge photovoltaic grid-connected inverter[J].Proceedings of the CSEE,2012(15):1-7.
[19]王国峰,王国庆,张洪涛,等.一种新型单相非隔离型光伏并网逆变器研究[J].电力电子技术,2013,47(3):45-47.WANG Guofeng,WANG Guoqing,ZHANG Hongtao,et al.A novel single-phase non-isolated photovoltaic grid-connected inverter[J].Power Electronics,2013,47(3):45-47.
[20]宋伟.基于DSP的单相逆变器并联控制技术研究[D].成都:西南交通大学,2010.SONG Wei.Research on Parallel Control Technology of Single-Phase Inverter Based on DSP[D].Chengdu:Southwest Jiaotong University,2010.
[2]刘星桥,田嘉,许洁.基于DSP的单相光伏并网逆变电源的设计[J].信息技术,2014(9):50-55.LIU Xingqiao,TIAN Jia,XU Jie.Design of single-phase grid-connected photovoltaic inverter based on DSP[J].Information Technologe,2014(9):50-55.
[3]王丛,惠晶.一种新型单相非隔离光伏并网逆变器[J].电力电子技术,2013,47(4):61-63.WANG Cong,HUI Jing.A novel single-phase non-isolated photovoltaic grid-connected inverter[J].Power Electronics,2013,47(4):61-63.
[4]张宁云.LCL型单相光伏并网逆变器电流控制与有源阻尼控制技术研究[D].上海:上海交通大学,2015.ZHANG Ningyun.Research on Current Control and Active Damping Control Technology of LCL Type Single-Phase Photovoltaic Gridconnected Inverter[D].Shanghai:Shanghai Jiaotong University,2015.
[5]马桂鹏.5kW两级式非隔离型单相光伏并网逆变器设计[D].上海:华东理工大学,2013.MA Guipeng.5kW Two-stage Non-isolated Single-phase Photovoltaic Grid-connected Inverter Design[D].Shanghai:East China University of Science and Technology,2013.
[6]刘迪,陈国联.单相两级式非隔离型光伏并网逆变器的研制[J].电源学报,2011(2):29-33.LIU Di,CHEN Guolian.Development of single-phase two-stage non-isolated photovoltaic grid-connected inverter[J].Journal of Power Supply,2011(2):29-33.
[7]王逸超,罗安,金国彬,等.单相LCL型并网逆变器新型谐波阻尼策略[J].中国电机工程学报,2014,34(33):5803-5810.WANG Yichao,LUO An,JIN Guobin,et al.New harmonic damping strategy of single-phase LCL grid-connected inverter[J].China Journal of Electrical Engineering,2014,34(33):5803-5810.
[8]赵清林,郭小强,邬伟扬.单相逆变器并网控制技术研究[J].中国电机工程学报,2007(16):60-64.ZHAO Qinglin,GUO Xiaoqiang,WU Weiyang.Research on single-phase inverter grid-connected control technology[J].Proceedings of the CSEE,2007(16):60-64.
[9]黄如海,谢少军.基于比例谐振调节器的逆变器双环控制策略研究[J].电工技术学报,2012,27(2):77-81.HUANG Ruhai,XIE Shaojun.Study on double-loop control strategy of inverter based on proportional resonant regulator[J].Transactions of China Electrotechnical Society,2012,27(2):77-81.
[10]余晓丹,徐宪东,陈硕翼,等.综合能源系统与能源互联网简述[J].电工技术学报,2016,31(1):1-13.YU Xiaodan,XU Xiandong,CHEN Shuoyi,et al.Brief introduction to integrated energy system and energy internet[J].Journal of Electrical Engineering,2016,31(1):1-13.
[11]胡巨,赵兵,王俊,等.三相光伏并网逆变器准比例谐振控制器设计[J].可再生能源,2014,32(2):152-157.HU Ju,ZHAO Bing,WANG Jun,et al.Design of quasi-proportional resonant controller for three-phase photovoltaic grid-connected inverter[J].Renewable Energy,2014,32(2):152-157.
[12]朱彬彬.高性能非隔离单相光伏并网逆变器控制策略研究[D].苏州:苏州大学,2015.ZHU Binbin.Research on Control Strategy of High Performance Non-isolated Single-phase Photovoltaic Grid-connected Inverter[D].Suzhou:Suzhou University,2015.
[13]薛家祥,张文,侍威,等.一种单相非隔离光伏并网逆变器的控制设计[J].低压电器,2013(8):25-30.XUE Jiaxiang,ZHANG Wen,SHI Wei,et al.Control design of a single-phase non-isolated photovoltaic grid-connected inverter[J].Low Voltage Apparatus,2013(8):25-30.
[14]夏向阳,唐伟,冉成科,等.基于DSP控制的单相光伏并网逆变器设计[J].电力科学与技术学报,2011,26(3):52-56.XIA Xiangyang,TANG Wei,RAN Chengke,et al.Design of single-phase photovoltaic grid-connected inverter based on DSP control[J].Journal of Electric Power Science and Technology,2011,26(3):52-56.
[15]祝龙记,张旭立.光伏并网逆变器LCL陷波校正滤波器[J].电工技术学报,2012,27(9):237-241.ZHU Longji,ZHANG Xuli.LCL notch correction filter for photovoltaic grid-connected inverter[J].Transactions of China Electrotechnical Society,2012,27(9):237-241.
[16]王飞,吴健芳,王红波.基于准比例谐振控制单相并网逆变器的研究[J].电气开关,2017,55(3):55-58.WANG Fei,WU Jianfang,WANG Hongbo.Research on single-phase grid-connected inverter based on quasi-proportional resonance control[J].Electrical Switch,2017,55(3):55-58.
[17]刘艳萍,赵腾,张进东.STM32的CPLD离线烧写系统设计[J].新器件新技术,2015,44(2):60-63.LIU Yanping,ZHAO Teng,ZHANG Jindong.Design of CPLD offline programming system for STM32[J].New Devices,New Technology,2015,44(2):60-63.
[18]张犁,孙凯,冯兰兰,等.一种低漏电流六开关非隔离全桥光伏并网逆变器[J].中国电机工程学报,2012(15):1-7.ZHANG Li,SUN Kai,FENG Lanlan,et al.A low leakage current six-switch non-isolated full-bridge photovoltaic grid-connected inverter[J].Proceedings of the CSEE,2012(15):1-7.
[19]王国峰,王国庆,张洪涛,等.一种新型单相非隔离型光伏并网逆变器研究[J].电力电子技术,2013,47(3):45-47.WANG Guofeng,WANG Guoqing,ZHANG Hongtao,et al.A novel single-phase non-isolated photovoltaic grid-connected inverter[J].Power Electronics,2013,47(3):45-47.
[20]宋伟.基于DSP的单相逆变器并联控制技术研究[D].成都:西南交通大学,2010.SONG Wei.Research on Parallel Control Technology of Single-Phase Inverter Based on DSP[D].Chengdu:Southwest Jiaotong University,2010.