LCL型三电平并网逆变器无差拍控制
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摘要
电压源型脉冲宽度调制(pulse width modulation,PWM)整流器交流侧通过LCL滤波器代替单电感滤波器接入电网,可以由较小的电感电容组合达到较好的滤波效果;但电容支路的引入将使传统的控制策略很难达到优良的控制效果,为此,以LCL滤波器运算电路为基础建立数学模型,并对该数学模型设计出LCL型三电平并网逆变器无差拍控制。MATLAB/Simulink仿真实验验证了所提的LCL型三电平并网逆变器无差拍控制的有效性。
It is able to achieve a better filtering effect by means of smaller inductance capacitor combination which is to use LCL filter to replace single inductor filter at the AC side of pulse width modulation( PWM) rectifier to connect into the power grid,but introduction of the capacitor branch makes the traditional control strategy difficult in achieving excellent control effect. Therefore,this paper establishes a mathematical model based on operational circuit of LCL filter and designs dead-beat control for this LCL threelevel grid-connected inverter. Simulating experiment based on MATLAB/SIMULINK verifies effectiveness of the dead-beat control.
It is able to achieve a better filtering effect by means of smaller inductance capacitor combination which is to use LCL filter to replace single inductor filter at the AC side of pulse width modulation( PWM) rectifier to connect into the power grid,but introduction of the capacitor branch makes the traditional control strategy difficult in achieving excellent control effect. Therefore,this paper establishes a mathematical model based on operational circuit of LCL filter and designs dead-beat control for this LCL threelevel grid-connected inverter. Simulating experiment based on MATLAB/SIMULINK verifies effectiveness of the dead-beat control.
引文
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[14]崔红芬,汪春,叶季蕾,等.多接入点分布式光伏发电系统与配电网交互影响研究[J].电力系统保护与控制,2015,43(10):91-97.CUI Hongfen,WANG Chun,YE Jilei,et al.Research of interaction of distributed PV system w ith multiple access points and distribution netw ork[J].Pow er System Protection and Control,2015,43(10):91-97.
[15]雷亚雄,李建文,李永刚.基于准PR调节器电流双闭环LCL三相并网逆变器控制[J].电力系统保护与控制,2014,42(12):44-50.LEI Yaxiong,LI Jianw en,LI Yonggang.Control strategy of three-phase LCL grid-connected inverter based on quasi-PR adjuster[J].Pow er System Protection and Control,2014,42(12):44-50.
[16]郭卫农,段善旭,康勇,等.电压型逆变器的无差拍控制技术研究[J].华中理工大学学报,2000(6):30-33.GUO Weinong,DUAN shanxu,KANG Yong,et al.Research on no-beat control technology of voltage inverter[J].Journal of South China University of Technology,2000(6):30-33.
[2]LYU J,HU W,WU F,et al.Three-level saddle space vector pulse w idth modulation strategy based on tw o-level space vector pulse w idth modulation for neutral-point-clamped three-level inverters[J].IET Pow er Electronics,2016,9(5):874-882.
[3]ZMOOD D N,HOLMES D G,BODE G H.Frequency-domain analysis of three-phase linear current regulators[J].IEEE Transactions on Industry Applications,2001,37(2):601-610.
[4]陈炜,陈成,宋战锋,等.双馈风力发电系统双PWM变换器比例谐振控制[J].中国电机工程学报,2009(15):1-7.CHEN Wei,CHEN Cheng,SONG Zhanfeng,et al.Proportional resonance control of dual PWM converter w ith doubly-fed w ind pow er generation system[J].Proceedings of the CSEE,2009(15):1-7.
[5]张兴,汪杨俊,余畅舟,等.LCL并网逆变器改进型重复控制策略[J].电力系统自动化,2014(20):101-107.ZHANG Xing,WANG Yangjun,YU Changzhou,et al.LCL grid-connected inverter improved repetitive control strategy[J].Pow er System Automation,2014(20):101-107.
[6]杨立永,杨烁,张卫平,等.单相PWM整流器改进无差拍电流预测控制方法[J].中国电机工程学报,2015(22):5842-5850.YANG Liyong,YANG Shuo,ZHANG Weiping,et al.LCL grid-connected inverter improved repetitive control strategy[J].Proceedings of the CSEE,2015(22):5842-5850.
[7]史丽萍,蔡儒军,陈丽兵,等.三相三线制有源滤波器的改进无差拍控制[J].电力系统保护与控制,2014,42(14):32-37.SHI Liping,CAI Rujun,CHEN Libing,et al.Improved imperfect beat control for three-phase three-w ire active filter[J].Pow er System Protection and Control,2014,42(14):32-37.
[8]陈燕东,罗安,周乐明,等.一种功率前馈的鲁棒预测无差拍并网控制方法[J].中国电机工程学报,2013(36):62-70,10.CHEN Yandong,LUO An,ZHOU Leming,et al.A robust predictive no-beat parallel control method for pow er feedforw ard[J].Proceedings of the CSEE,2013(36):62-70,10.
[9]黄天富,石新春,魏德冰,等.基于电流无差拍控制的三相光伏并网逆变器的研究[J].电力系统保护与控制,2012,40(11):36-41.HUANG Tianfu,SHI Xinchun,WEI Debing,et al.Research on three-phase photovoltaic grid-connected inverter based on current no-difference beat control pow er system protection and control,2012,40(11):36-41.
[10]高金辉,邢倩.无差拍控制的非隔离型并网逆变器漏电流分析[J].电力系统保护与控制,2014,42(9):120-125.GAO Jinhui,XING Qian.Deadbeat control for transformerless PV grid inverter leakage current analysis[J].Pow er System Protection and Control,2014,42(9):120-125.
[11]张战彬,翟红霞,徐华博,等.光伏电站多逆变器并网系统输出谐波研究[J].电力系统保护与控制,2016,44(14):142-146.ZHANG Zhanbin,ZHAI Hongxia,XU Huabo,et al.Study on output harmonic of multi-inverter grid-connected in photovoltaic plant[J].Pow er System Protection and Control,2016,44(14):142-146.
[12]黄冬冬,吴在军,窦晓波,等.光伏规模化并网的电能质量复合控制策略研究[J].电力系统保护与控制,2015,43(3):107-112.HUANG Dongdong,WU Zaijun,DOU Xiaobo,et al.A pow er quality composite control strategy based on large-scale grid-connected photovoltaic pow er generation[J].Pow er System Protection and Control,2015,43(3):107-112.
[13]王亮,王志新,陆斌锋,等.基于LCL滤波器的单相光伏并网逆变控制器设计[J].电网与清洁能源,2014,30(12):114-118.WANG Liang,WANG Zhixin,LU Binfeng,et al.Design of the controller of the single phase PV grid-connected inverter w ith LCL filter[J].Pow er System and Clean Energy,2014,30(12):114-118.
[14]崔红芬,汪春,叶季蕾,等.多接入点分布式光伏发电系统与配电网交互影响研究[J].电力系统保护与控制,2015,43(10):91-97.CUI Hongfen,WANG Chun,YE Jilei,et al.Research of interaction of distributed PV system w ith multiple access points and distribution netw ork[J].Pow er System Protection and Control,2015,43(10):91-97.
[15]雷亚雄,李建文,李永刚.基于准PR调节器电流双闭环LCL三相并网逆变器控制[J].电力系统保护与控制,2014,42(12):44-50.LEI Yaxiong,LI Jianw en,LI Yonggang.Control strategy of three-phase LCL grid-connected inverter based on quasi-PR adjuster[J].Pow er System Protection and Control,2014,42(12):44-50.
[16]郭卫农,段善旭,康勇,等.电压型逆变器的无差拍控制技术研究[J].华中理工大学学报,2000(6):30-33.GUO Weinong,DUAN shanxu,KANG Yong,et al.Research on no-beat control technology of voltage inverter[J].Journal of South China University of Technology,2000(6):30-33.