李泽斌;罗安;田园;刘奇;谢龙裕;徐千鸣;

• 1:国家电能变换与控制工程技术研究中心(湖南大学)

摘要(Abstract)：

针对LCL型光伏并网逆变器存在的谐振问题,建立了电流内环的控制模型,并分析了其开环传递函数。由分析可知,采用逆变器输出电流反馈进行电流内环控制时,控制器中包含一个固有阻尼项,该阻尼项有利于提高控制系统的阻尼、抑制LCL滤波器的谐振。在此基础上,提出了一种基于逆变器输出电流反馈的准比例谐振(proportional resonant,PR)电流内环控制策略。该控制策略没有引入额外的无源阻尼和有源阻尼,仅使用逆变器输出电流反馈进行控制,便可有效抑制LCL滤波器的谐振问题,提高控制系统的稳定性。仿真和实验结果验证了所提控制策略的有效性。

关键词(KeyWords)： 光伏并网逆变器;LCL滤波器;逆变器输出电流反馈;电流内环;准PR控制

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金重点项目(51237003);; 中国与欧洲政府间国际合作计划项目(2010DFA61640)~~

作者(Author): 李泽斌;罗安;田园;刘奇;谢龙裕;徐千鸣;

Email:

DOI: 10.13335/j.1000-3673.pst.2014.10.024

参考文献(References)：

• [1]艾欣,韩晓男,孙英云.大型光伏电站并网特性及其低碳运行与控制技术[J].电网技术,2013,37(1):15-23.Ai Xin,Han Xiaonan,Sun Yingyun.Grid-connection characteristics of large-scale photovoltaic power station and its low-carbon operation and control technology[J].Power System Technology,2013,37(1):15-23(in Chinese).
• [2]Xianwen Bao,Fang Zhuo,Yuan Tian,et al.Simplified feedback linearization control of three-phase photovoltaic inverter with an LCL filter[J].IEEE Transactions on Power Electronics,2013,28(6):2739-2752.
• [3]武海涛,刘永和.大功率电流型光伏并网换流器的拓扑与控制[J].电网技术,2013,37(8):2086-2093.Wu Haitao,Liu Yonghe.Topology and control of high-power current source converter for grid-connection of photovoltaic generation system[J].Power System Technology,2013,37(8):2086-2093(in Chinese).
• [4]汪海瑛,白晓民,马纲.并网光伏电站的发电可靠性评估[J].电网技术,2012,36(10):1-5.Wang Haiying,Bai Xiaomin,Ma Gang.Reliability assessment of grid-integrated solar photovoltaic system[J].Power System Technology,2012,36(10):1-5(in Chinese).
• [5]Guo Xiaoqiang,Wu Weiyang,Gu Herong.Modeling and simulation of direct output current control for LCL interfaced grid-connected converters with parallel passive damping[J].Simulation Modeling Practices and Theory,2010,18(7):946-956.
• [6]徐志英,许爱国,谢少军.采用LCL滤波器的并网逆变双闭环入网电流控制技术[J].中国电机工程学报,2009,29(27):36-41.Xu Zhiying,Xu Aiguo,Xie Shaojun.Dual-loop grid current control technique for grid-connected inverter using an LCL filter[J].Proceedings of the CSEE,2009,29(27):36-41(in Chinese).
• [7]尹靖元,金新民,吴学智,等.基于带通滤波器的LCL型滤波器有缘阻尼控制[J].电网技术,2013,37(8):2376-2382.Yin Jingyuan,Jin Xinmin,Wu Xuezhi,et al.Active damping control strategy for LCL filter based on band pass filter[J].Power System Technology,2013,37(8):2376-2382(in Chinese).
• [8]王颖杰,伍小杰,戴鹏,等.采用参数辨识及新型主动阻尼控制的LCL滤波脉宽调制整流器[J].中国电机工程学报,2012,32(15):31-39.Wang Yingjie,Wu Xiaojie,Dai Peng,et al.PWM rectifier with LCL filter based on parameter identification and a new active damping control[J].Proceedings of the CSEE,2012,32(15):31-39(in Chinese).
• [9]曾正,赵荣祥,杨欢,等.多功能并网逆变器及其在微电网电能质量定制中的应用[J].电网技术,2013,36(5):58-67.Zeng Zheng,Zhao Rongxiang,Yang Huan,et al.A multi-functional grid-connected inverter and its application to customized power quality of microgrid[J].Power System Technology,2013,36(5):58-67(in Chinese).
• [10]Yi Tang,Poh Chiang Loh,Peng Wang,et al.Generalized design of high performance shunt active power filter with output LCL filter[J].IEEE Transactions on Industrial Electronics,2012,59(3):1443-1452.
• [11]彭双剑,罗安,荣飞,等.LCL滤波器的单相光伏并网控制策略[J].中国电机工程学报,2011,31(21):17-24.Peng Shuangjian,Luo An,Rong Fei,et al.Single-phase photovoltaic grid-connected control strategy with LCL filter[J].Proceedings of the CSEE,2011,31(21):17-24(in Chinese).
• [12]汤赐.基于LCL输出滤波器的并网逆变器四种PI控制器设计方法[J].电网技术,2013,37(11):3268-3275.Tang Ci.Four design methods for proportional-integral controller of grid-connected inverter with LCL output filter[J].Power System Technology,2013,37(11):3268-3275(in Chinese).
• [13]Zhao Wenqiang,Chen Guozhu.Comparison of active and passive damping methods for application in high power active power fileter with LCL-filter[C]//International Conference on Sustainable Power Generation and Supply.Nanjing:IEEE,2009:1-6.
• [14]张承慧,叶颖,陈阿莲,等.基于输出电流控制的光伏并网逆变电源[J].电工技术学报,2007,22(8):41-45.Zhang Chenghui,Ye Ying,Chen Alian,et al.Research on grid-connected photovoltaic inverter based on outpput current control[J].Transactions of China Electrotechnical Society,2007,22(8):41-45(in Chinese).
• [15]Ning He,Dehong Xu,Ye Zhu,et al.Weighted average current control in a three-phase grid inverter with an LCL filter[J].IEEE Transactions on Power Electronics,2013,28(6):2785-2797.
• [16]李芬,邹旭东,邹云屏,等.并网LCL滤波的PWM整流器输入阻抗分析[J].电工技术学报,2010,25(1):97-103.Li Fen,Zou Xudong,Zou Yunping,et al.Input impedance analysis of LCL-filter pwm rectifier connected to grid[J].Transactions of China Electrotechnical Society,2010,25(1):97-103(in Chinese).
• [17]马琳,金新民,唐芬,等.三相并网逆变器比例谐振控制及其网压前馈问题分析[J].电工技术学报,2012,27(8):56-63.Ma Lin,Jin Xinmin,Tang Fen,et al.Analysis of three-phase grid-connected inverter proportional resonant control and grid voltage feed-forward[J].Transactions of China Electrotechnical Society,2012,27(8):56-63(in Chinese).
• [18]周林,张林强,廖波,等.单相光伏逆变器控制技术研究[J].电网技术,2012,36(9):25-30.Zhou Lin,Zhang Linqiang,Liao Bo,et al.Research on control strategy of single-phase photovoltaic inverter[J].Power System Technology,2012,36(9):25-30(in Chinese).
• [19]周京华,刘劲东,陈亚爱,等.大功率光伏逆变器的低电压穿越控制[J].电网技术,2013,37(7):1799-1807.Zhou Jinghua,Liu Jindong,Chen Yaai,et al.Low voltage ride-through control of high power inverter for grid-connection of photovoltaic generation[J].Power System Technology,2013,37(7):1799-1807(in Chinese).
• [20]陈燕东,罗安,谢三军,等.一种无延时的单相光伏并网功率控制方法[J].中国电机工程学报,2012,32(25):118-125.Chen Yandong,Luo An,Xie Sanjun,et al.A single-phase photovoltaic grid-connected power contro method without delay[J].Proceedings of the CSEE,2012,32(25):118-125(in Chinese).
• [21]Xuehua Wang,Xinbo Ruan,Shangwei Liu,et al.Full feedforward of grid voltage for grid-connected inverter with LCL filter to suppress current distortion due to grid voltage harmonics[J].IEEE Transactions on Power Electronics,2010,25(12):3119-3127.
• [22]张兴,张崇巍.PWM整流器及其控制[M].北京:机械工业出版社,2012:33.
• [23]Fangrui Liu,Shanxu Duan,Fei Liu,et al.A variable step size INC MPPT method for PV systems[J].IEEE Transactions on Industrial Electronics,2008,55(7):2622-2628.