无谐波检测控制的三电平APF死区效应补偿策略
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摘要
为了在无谐波检测控制的三电平有源电力滤波器中根据补偿电流反馈削弱死区效应,本文提出一种适用于无谐波检测控制的三电平有源电力滤波器的补偿电流计算方法。该方法通过分析不同开关状态下有源电力滤波器滤波电感所承受的电压来计算补偿电流,并利用级联延迟信号对消滤波器提高运算的准确性,然后基于计算得出的补偿电流对空间矢量脉宽调制信号进行修正。通过Matlab/Simulink仿真研究表明,该方法不但避免了大量的死区,并且消除了不必要的开关切换,改善了有源电力滤波器的滤波效果。
To attenuate the dead-time effect of a three-level active power filter(APF)under non-harmonic detection control based on the feedback of compensation current,a compensation current calculation method for a three-level APF is proposed,which is applicable for the non-harmonic detection control. Through analyzing the voltage on the APF filter inductance in different switching states,the compensation current is calculated.Moreover,the operation accuracyis improved by using a cascaded delayed signal cancellation(CDSC)filter,then the space vector pulse width modulation(SVPWM)signal is corrected based on the calculated compensation current.Simulations are conducted using Matlab/Simulink,and results show that this method not only avoids a large number of dead zones,but also eliminates unnecessary switches and improves the filtering effect of APF.
To attenuate the dead-time effect of a three-level active power filter(APF)under non-harmonic detection control based on the feedback of compensation current,a compensation current calculation method for a three-level APF is proposed,which is applicable for the non-harmonic detection control. Through analyzing the voltage on the APF filter inductance in different switching states,the compensation current is calculated.Moreover,the operation accuracyis improved by using a cascaded delayed signal cancellation(CDSC)filter,then the space vector pulse width modulation(SVPWM)signal is corrected based on the calculated compensation current.Simulations are conducted using Matlab/Simulink,and results show that this method not only avoids a large number of dead zones,but also eliminates unnecessary switches and improves the filtering effect of APF.
引文
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[14]姜子健,杨欢,沈建辉,等(Jiang Zijian,Yang Huan,Shen Jianhui,et al).基于级联延时信号消除-锁相环算法的配电网静止同步补偿器控制策略(DSTATCOM control strategy based on cascaded delayed signal cancellationphase locked loop algorithm)[J].电网技术(PowerSystemTechnology),2015,39(7):1989-1994.
[15]吴恒,杨东升,阮新波(Wu Heng,Yang Dongsheng,Ruan Xinbo).基于串联信号延迟对消法的三相非理想电网锁相控制策略(Phase-locked loop based on cascaded delayed signal cancellation for distorted grid)[J].电工技术学报(TransactionsofChinaElectrotechnicalSociety),2014,29(8):255-264.
[2]周京华,柴小丰,祝天岳,等(Zhou Jinghua,Chai Xiaofeng,Zhu Tianyue,et al).三电平有源电力滤波器谐波电流及中点电位平衡控制(Control of harmonic current and neutral-point potential balance for three-level active power filter)[J].电网技术(Power System Technology),2017,41(6):2012-2019.
[3]胡健,陈文宪,陈冬冬,等(Hu Jian,Chen Wenxian,Chen Dongdong,et al).基于中线电流注入的三电平有源电力滤波器中点平衡策略(A neutral current injection based neutral point potential control strategy for neutral point clamping based tri-level shunt active power filter)[J].电网技术(Power System Technology),2014,38(11):3160-3165.
[4]刘建华,周万鹏,赵世杰(Liu Jianhua,Zhou Wanpeng,Zhao Shijie).有源电力滤波器自适应谐波检测新算法(New adaptive harmonic detection algorithm of active power filter)[J].电力系统及其自动化学报(Proceedings of the CSU-EPSA),2016,28(9):112-116.
[5]王广柱(Wang Guangzhu).有源电力滤波器谐波及无功电流检测的不必要性(一)(The unnecessaries of harmonic and reactive current detection for active power filters—PartⅠ)[J].电工技术学报(Transactions of China Electrotechnical Society),2007,22(1):137-141,148.
[6]王广柱(Wang Guangzhu).有源电力滤波器谐波及无功电流检测的不必要性(二)—仿真及实验(Investigation on the unnecessary of harmonic and reactive current detection for active power filters(PartⅡ)—Simulation and experiment)[J].电工技术学报(Transactions of China Electrotechnical Society),2007,22(2):132-136.
[7]王广柱(Wang Guangzhu).并联型有源电力滤波器电流控制的等效原理(Equivalence principle of current control for shunt active power filters)[J].中国电机工程学报(Proceedings of the CSEE),2006,26(15):40-45.
[8]周娟,陈映,唐慧英,等(Zhou Juan,Chen Ying,Tang Huiying,et al).基于脉冲调整的四桥臂逆变器死区补偿策略(Dead-time compensation strategy for four-leg inverter based on pulse-tuning)[J].电工技术学报(TransactionsofChinaElectrotechnicalSociety),2016,31(3):16-24.
[9]袁佳歆,薛钢,赵震,等(Yuan Jiaxin,Xue Gang,Zhao Zhen,et al).三相逆变器无死区最优矢量控制研究(Newoptimal dead-time elimination for three-phase voltagesource inverters)[J].电力系统保护与控制(Power System Protection and Control),2014,42(24):18-24.
[10]武敏,孟润泉,赵刚(Wu Min,Meng Runquan,Zhao Gang).三电平并联型APF死区效应分析及其对策研究(Tri-level shunt APF dead-time effect analysis and its countermeasure research)[J].电力系统保护与控制(Power System Protection and Control),2016,44(13):20-26.
[11] Wang Yifei,Li Yunwei. Three-phase cascaded delayed signal cancellation PLL for fast selective harmonic detection[J]. IEEE Trans on Industrial Electronics,2012,60(4):1452-1463.
[12]孙华,张迎,李成君(Sun Hua,Zhang Ying,Li Chengjun).三电平APF死区效应及其补偿策略研究(Study on dead-time effect of active filter with a three-level NPC inverter and its compensation strategies)[J].电力电子技术(Power Electronics),2011,45(10):108-110.
[13]徐榕,于泳,杨荣峰,等(Xu Rong,Yu Yong,Yang Rongfeng,et al).基于单相级联延时信号消除法的三相基波正序有功电流检测方法(A methodto detect three-phase fundamental positive-sequence active current based on single-phase cascaded delayed signal cancellation)[J].电网技术(Power SystemTechnology),2014,38(8):2231-2236.
[14]姜子健,杨欢,沈建辉,等(Jiang Zijian,Yang Huan,Shen Jianhui,et al).基于级联延时信号消除-锁相环算法的配电网静止同步补偿器控制策略(DSTATCOM control strategy based on cascaded delayed signal cancellationphase locked loop algorithm)[J].电网技术(PowerSystemTechnology),2015,39(7):1989-1994.
[15]吴恒,杨东升,阮新波(Wu Heng,Yang Dongsheng,Ruan Xinbo).基于串联信号延迟对消法的三相非理想电网锁相控制策略(Phase-locked loop based on cascaded delayed signal cancellation for distorted grid)[J].电工技术学报(TransactionsofChinaElectrotechnicalSociety),2014,29(8):255-264.