基于电流电压内在关系的SAPF的SVPWM控制算法的研究及稳定性分析
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摘要
为了提高并联型有源电力滤波器(Shunt Active Power Filter,SAPF)的电流跟踪性能,提出一种基于SVPWM的并联型有源电力滤波器的电流跟踪控制算法。由于SAPF参考指令是电流值,而SVPWM参考指令是电压值,因此根据电流电压内在关系将SVPWM控制算法与SAPF的参考指令电流相结合,通过改变SVPWM调制方式减少功率器件的开关次数,从而降低功率器件的开关损耗,提高控制性能。并且通过构造Lyapunov函数,对SVPWM控制的SAPF的稳定性进行了分析。仿真和实验结果证明该算法简单,可以很好地跟踪指令电流,能实现对SAPF的实时控制,并且具有非常好的谐波补偿效果。SAPF在负载扰动下的补偿效果证明了关于SVPWM控制的SAPF的稳定性分析的正确性。
To improve the current tracking ability of parallel Shunt Active Power Filter(SAPF), a current tracking control algorithm based on Space Vector Pulse-Width Modulation(SVPWM) is proposed. The reference instruction of SAPF is the current value, but the reference instruction of SVPWM is the voltage value, so based on the internal relationship between the current and voltage, the control algorithm of SVPWM is combined with the reference current of SAPF, and by changing the modulation way of the SVPWM, the switching frequency of power device is decreased, which can reduce the switching loss and improve the control performance. By constructing the Lyapunov function, the stability of SAPF controlled by the SVPWM is analyzed. Simulation and tests show that the algorithm is simple, it can track the instruction current well, the real-time control of SAPF can be realized, and it has good harmonic comparison results. The compensation results of SAPF under the load disturbance prove the correctness of the analysis of this paper on the stability of SAPF controlled by the SVPWM.
To improve the current tracking ability of parallel Shunt Active Power Filter(SAPF), a current tracking control algorithm based on Space Vector Pulse-Width Modulation(SVPWM) is proposed. The reference instruction of SAPF is the current value, but the reference instruction of SVPWM is the voltage value, so based on the internal relationship between the current and voltage, the control algorithm of SVPWM is combined with the reference current of SAPF, and by changing the modulation way of the SVPWM, the switching frequency of power device is decreased, which can reduce the switching loss and improve the control performance. By constructing the Lyapunov function, the stability of SAPF controlled by the SVPWM is analyzed. Simulation and tests show that the algorithm is simple, it can track the instruction current well, the real-time control of SAPF can be realized, and it has good harmonic comparison results. The compensation results of SAPF under the load disturbance prove the correctness of the analysis of this paper on the stability of SAPF controlled by the SVPWM.
引文
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[2]张永峰,程新功,宗西举,等.单相有源电力滤波器的非线性切换控制[J].电力系统保护与控制,2011,39(18):139-144.ZHANG Yong-feng,CHENG Xin-gong,ZONG Xi-ju,et al.Nonlinear switching control of single-phase active power filter[J].Power System Protection and Control,2011,39(18):139-144.
[3]宋文南,刘宝仁.电力系统谐波分析[M].北京:水利电力出版社,1995.SONG Wen-nan,LIU Bao-ren.Power system harmonic analysis[M].Beijing:Water Resources and Electric Power Press,1995.
[4]张晓,孔令军.三相三线制并联型有源电力滤波器的准滑模变结构控制[J].电力系统保护与控制,2011,39(21):40-44.ZHANG Xiao,KONG Ling-jun.The quasi-sliding mode control of the shunt active power filter in three-phase three-wire system[J].Power System Protection and Control,2011,39(21):40-44.
[5]王兆安,杨君,刘进军.谐波抑制和无功功率补偿[M].北京:机械工业出版社,1998.WANG Zhao-an,YANG Jun,LIU Jin-jun.Harmonic restraint and reactive compensate[M].Beijing:China Machine Press,1998.
[6]徐永海,刘晓博.考虑指令电流的变环宽准恒频电流滞环控制方法[J].电工技术学报,2012,27(6):90-95.XU Yong-hai,LIU Xiao-bo.A variable hysteresis-band and quasi-constant current controller with reference current[J].Transactions of China Electrotechnical Society,2012,27(6):90-95.
[7]陆兵,刘维亭.三相SPWM逆变器的调制建模和仿真[J].电子技术工程,2013,21(1):132-134.LU Bing,LIU Wei-ting.Simulation of three-phase SPWM inverter based on Matlab/Simulink[J].Electronic Design Engineering,2013,21(1):132-134.
[8]刘婷婷,谭彧,吴刚,等.基于SVPWM的高转速永磁同步电机控制系统的研究[J].电力系统保护与控制,2009,37(12):11-19.LIU Ting-ting,TAN Yu,WU Gang,et al.Simulating of high speed PMSM control system based on SVPWM[J].Power System Protection and Control,2009,37(12):11-19.
[9]DELL'AQUILA A,LECCI A,MONOPOLI V G.Fuzzy controlled active filter driven by an innovative current reference for cost reduction[C]//Industrial Electronics,2002.ISIE 2002.Proceedings of the 2002 IEEE International Symposium on,2002,3:948-952.
[10]K?MüRCüGIL H,KüKRER ?.Control strategy for single-phase PWM AC/DC voltage-source converters based on Lyapunov’s direct method[J].Int J Electron,2000,87(12):1485-1498.
[11]HASAN K,OSMAN K.Lyapunov-based control for three-phase PWM AC/DC voltage-source converters[J].IEEE Trans on Power Electronic,1998,13(5):801-813.
[12]于晶荣,滕召胜.有源电力滤波器预测电流控制及稳定性分析[J].电工技术学报,2009,24(7):164-170.YU Jing-rong,TENG Zhao-sheng.Predictive current control and stability analysis of active power filter[J].Transactions of China Electrotechnical Society,2009,24(7):164-170.
[13]杨贵杰,孙力,崔乃政,等.空间矢量脉宽调制方法的研究[J].中国电机工程学报,2001,21(5):79-83.YANG Gui-jie,SUN Li,CUI Nai-zheng,et al.Study on method of the space vector PWM[J].Proceedings of the CSEE,2001,21(5):79-83.