基于复合控制的有源电力滤波器电流控制策略
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摘要
大量电力电子设备的使用,导致电网中产生了一系列的谐波。针对谐波抑制方法,提出了一种集无差拍控制和改进型重复控制于一体的复合控制策略,实现对pk±1次谐波的高效补偿。依据有源电力滤波器(Active Power Filter,APF)的数学模型,推导出应用于有源电力滤波器的无差拍控制算法;提出一种改进型重复控制,缩短工频延时,通过调节内模p的值,抑制pk±1次谐波;详细研究了复合控制的设计方法。将无差拍控制和复合控制进行仿真对比和实验验证,经滤波后网侧电流畸变率分别降至7.8%和2.8%。该结果表明,复合控制可以效地补偿谐波,改善波形质量,同时满足稳态精度和动态性能的要求。
The wide application of power electronic equipment makes harmonic problem become increasingly serious. The deadbeat control combined with repetitive control are utilized to realize the high efficiency compensation for pk±1harmonics. The deadbeat control is deduced by mathematical model in order to control different harmonics, and a repetitive control is proposed to eliminate periodic steady-state error and shorten frequency delay through adjusting the value of the internal model p. The results of simulation and experiments demonstrate the effectiveness of current control for APF, the total harmonic distortion values of source current by deadbeat control and compound control reduce to 7.8% and 2.8%. The compensation meet the requirements of the higher precision and better dynamic performance.
The wide application of power electronic equipment makes harmonic problem become increasingly serious. The deadbeat control combined with repetitive control are utilized to realize the high efficiency compensation for pk±1harmonics. The deadbeat control is deduced by mathematical model in order to control different harmonics, and a repetitive control is proposed to eliminate periodic steady-state error and shorten frequency delay through adjusting the value of the internal model p. The results of simulation and experiments demonstrate the effectiveness of current control for APF, the total harmonic distortion values of source current by deadbeat control and compound control reduce to 7.8% and 2.8%. The compensation meet the requirements of the higher precision and better dynamic performance.
引文
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[15]邹志翔,王政,程明.双模结构重复控制器在单相并联有源滤波器中的应用[J].中国电机工程学报,2013,33(36):88-95.ZOU Zhixiang,WANG Zheng,CHENG Ming.A hybrid current regulation scheme for single-phase active power filters based on dual-mode structure repetitive control[J].Proceedings of the CSEE,2013,33(36):88-95.
[2]吕广强,刘娱,段海军.APF中一种改进的变步长LMS自适应谐波检测算法[J].电力系统保护与控制,2016,44(7):96-101.LüGuangqiang,LIU Yu,DUAN Haijun.An improved variable step-size LMS adaptive harmonic detection algorithm for active power filters[J].Power System Protection and Control,2016,44(7):96-101.
[3]王洪诚,王蕾,沈霞,等.基于改进增益型自适应LMS算法的谐波检测方法[J].电力系统保护与控制,2016,44(5):42-46.WANG Hongcheng,WANG Lei,SHEN Xia,et al.New harmonic detection method based on LMS algorithm of improved adaptive gain[J].Power System Protection and Control,2016,44(5):42-46.
[4]GARCIA CERRADA A,PINZON ARDILA O,FELIU BATLLE V,et al.Application of a repetitive controller for a phase active power filter[J].IEEE Transactions on Power Electronics,2007,22(1):237-246.
[5]徐群伟,钟晓剑,胡健,等.基于误差迭代PI和改进重复控制的APF补偿电流控制[J].电力系统自动化,2015,39(3):124-131.XU Qunwei,ZHONG Xiaojian,HU Jian,et al.Compensation current control of APF based on error iteration PI and improved repetitive control[J].Automation of Electric Power Systems,2015,39(3):124-131.
[6]HUANG Wei,ZHOU Lidan,LI Lixue,et al.A novel recursive integral PI repetitive control for three-phase three-wire shunt active power filter[C]//Industrial Electronics and Applications(ICIEA),2011 6th IEEE Conference on:IEEE,2011,49(20):493-498.
[7]陈玉庆,武玉强,蔡彬.基于电流环复合控制的有源电力滤波器[J].电力自动化设备,2009,29(10):43-49.CHEN Yuqing,WU Yuqiang,CAI Bin.Active power filter based on compound control of current loop[J].Electric Power Automation Equipment,2009,29(10):43-49.
[8]刘飞,宫金武,彭光强,等.一种复合式重复控制在并联型有源电力滤波器设计中的应用[J].电工技术学报,2012,27(12):138-145.LIU Fei,GONG Jinwu,PENG Guangqiang,et al.Application of compound repetitive control in shunt active power filter[J].Transactions of China Electrotechnical Society,2012,27(12):138-145.
[9]SUN Jianjun,GONG Jinwu,CHEN Baifeng,et al.Analysis and design of repetitive controller based on regeneration spectrum and sensitivity function in active power filter system[J].IET Power Electronics,2014,7(7):2133-2140.
[10]宫金武,查晓明,陈佰锋.一种快速重复控制策略在APF中的实现和分析[J].电工技术学报,2011,26(10):110-117.GONG Jinwu,ZHA Xiaoming,CHEN Baifeng.Analysis and realization of a fast repetitive controller in active power filter system[J].Transactions of China Electrotechnical Society,2011,26(10):110-117.
[11]RODRIGUEZ A,GIRóN C,SáEZ V,et al.Analysis of repetitive-based controllers for selective harmonic compensation in active power filters[C]//IECON Proceedings,2010:2013-2018.
[12]何英杰,刘进军,王兆安,等.基于重复预测原理的三电平APF无差拍控制方法[J].电工技术学报,2010,25(2):114-120.HE Yingjie,LIU Jinjun,WANG Zhaoan,et al.A deadbeat control algorithm based on repetitive predictor theory for three-level active power filter[J].Transactions of China Electrotechnical Society,2010,25(2):114-120.
[13]周娟,秦静,王子绩,等.内置重复控制器无差拍控制在有源滤波器中的应用[J].电工技术学报,2013,28(2):233-238.ZHOU Juan,QIN Jing,WANG Ziji,et al.Application of deadbeat control with plug-in repetitive controller in active power filter[J].Transactions of China Electrotechnical Society,2013,28(2):233-238.
[14]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.A deadbeat control scheme for three-phase three-wire active power filter[J].Power System Protection and Control,2014,42(14):32-37.
[15]邹志翔,王政,程明.双模结构重复控制器在单相并联有源滤波器中的应用[J].中国电机工程学报,2013,33(36):88-95.ZOU Zhixiang,WANG Zheng,CHENG Ming.A hybrid current regulation scheme for single-phase active power filters based on dual-mode structure repetitive control[J].Proceedings of the CSEE,2013,33(36):88-95.