三相三线三电平有源滤波器的优化3D-SVPWM法
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摘要
三相三线有源滤波器(APF)由于没有中性线,一般不考虑零序分量,通常采用二维空间矢量调制法(2D-SVPWM),然而造成中性点电压偏移,使开关管电压应力加大。提出用三维空间矢量调制法(3D-SVPWM)对三相三线三电平有源滤波器进行调制,控制零序分量保证中点电压稳定,间接控制直流侧电容电压的平衡。通过对3D-SVPWM法开关时间进行归纳,发现开关时间只需根据参考矢量所在的相位划分成12个扇区进行计算。因此可以去除子扇区的划分,简化了3D-SVPWM的运算时间,同时消除子扇区划分误差。仿真与实验证明,采用所提出的优化3D-SVPWM法不但补偿谐波效果好,直流侧电容电压也较平衡。
Two-dimensional space vector modulation( 2 D-SVPWM) is applied in 3-phase 3-wire active power filter( APF),which ignores zero sequence component,because it doesn't have neutral line. The neutral-point voltage offset is caused and the voltage stress of switches increase. Three-dimensional space vector modulation( 3 D-SVPWM) was applied in 3-phase 3-wire three level APF. The neutral-point voltage was ensured and DC-link capacitor voltages was balanced through controlled zero sequence component. After concluding the switches' duty time of 3 D-SVPWM,it is found that the switches' duty times are only related to the phase of reference vector and divided into 12 sections for calculating. Thus sub sections division was cut down,which shortens calculation and sub sections division error was eliminated.Finally,simulation and experimental results validate the correctness and feasibility of proposed algorithm.
Two-dimensional space vector modulation( 2 D-SVPWM) is applied in 3-phase 3-wire active power filter( APF),which ignores zero sequence component,because it doesn't have neutral line. The neutral-point voltage offset is caused and the voltage stress of switches increase. Three-dimensional space vector modulation( 3 D-SVPWM) was applied in 3-phase 3-wire three level APF. The neutral-point voltage was ensured and DC-link capacitor voltages was balanced through controlled zero sequence component. After concluding the switches' duty time of 3 D-SVPWM,it is found that the switches' duty times are only related to the phase of reference vector and divided into 12 sections for calculating. Thus sub sections division was cut down,which shortens calculation and sub sections division error was eliminated.Finally,simulation and experimental results validate the correctness and feasibility of proposed algorithm.
引文
[1] PATNAIK N,PANDA A K. Performance analysis of a 3 phase 4wire UPQC system based on PAC based SRF controller with realtime digital simulation[J]. International Journal of Electrical Pow-er&Energy Systems,2016,74:212.
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[13]王裕,刘翔,谢运祥.三相四线制系统3D-SVPWM调制策略优化设计[J].华南理工大学学报(自然科学版),2015,43(8):21.WANG Yu,LIU Xiang,XIE Yunxiang. Optimization design ofthree-dimensional space vector pulse-width modulation strategy forthree-phase four-wire system[J]. Journal of South China Univer-sity of Technology(Natural Science Edition),2015,43(8):21.
[14] BEIG A R. Synchronized SVPWM algorithm for the over-modula-tion region of a low switching freque-ncy medium-voltage three-level VSI[J]. IEEE Transactions on Industrial Electronics,2012,59(12):4545.
[15] VODYAKHO O,MI C C. Three-level inverter-based shunt activepower filter in three-phase three-wire and four-wire systems[J].IEEE Transactions on Power Electronics,2009,24(5):1350.
[16] BEIG A R,NARAYANAN G,RANGANATHAN V T. ModifiedSVPWM algorithm for three level VSI with synchronized and sym-metrical waveforms[J]. IEEE Transactions on Industrial Elec-tronics,2007,54(1):486.
[17] XIA C,SHAO Hongjun,YUN Zhang,et al. Adjustable propor-tional hybrid SVPWM strategy for neutral-point-clamped three-level inverters[J]. IEEE Transactions on Industrial Electronics,2013,60(10):4234.
[18] LANGER N,BHAT A H,AGARWAL P. Neural-network-basedspace-vector pulse-width modulation for capacitor voltage balan-cing of three-phase three-level improved power quality converter[J]. Power Electronics,IET,2014,7(4):973.
[19] LEON J I,SERGIO V,RAMAON P,et al. Three-dimensionalfeedforward space vector modulation applied to multilevel diode-cla-mped converters[J]. IEEE Transactions on Industrial Elec-tronics,2009,56(1):101.
[20]薛硕,申淑丽,吴迪.三电平逆变器简化3D-SVPWM策略研究[J].大功率交流技术,2017(1):9.XUE Shuo,SHEN Shuli,WU Di. Research on simplified 3D-SVPWM method for three-level inverter[J]. High Power Convert-er Technology,2017(1):9.
[2] ZADKHAST S,FIRUZABAD M F,AMINIFAR F,et al. Reliabil-ity evaluation of an HVDC transmission system tapped by a VSCstation[J]. IEEE Transactions on Power Delivery,2010,25(3):1962.
[3] BARRENA J A,MARROYO L,MR V,et al. Individual voltagebalancing strategy for PWM cascaded H-bridge converter basedSTATCOM[J]. IEEE Transactions on Industrial Electronics,2008,55(1):21.
[4] ASIMINOAEI L,RODRIGUEZ P,BLAABHERG F. Applicationof discontinuous PWM modulation in active power filters[J].IEEE Transactions on Power Electronics,2008,23(4):1692.
[5]刘洪臣,王国立,赵丹,等.空间矢量调制的五相Z源逆变器[J].电机与控制学报,2014,18(6):72.LIU Hongchen,WANG Guoli,ZHAO Dan,et al. Five-phase Z-source inverter based on space vector modulation[J]. Electric Ma-chines and Control,2014,18(6):72.
[6] LI X,DUSMEZ S,AKIN B,et al. A new SVPWM for the phasecurrent reconstruction of three-phase three-level T-type converters[J]. IEEE Transactions on Power Electronics,2016,31(3):2627-2637.
[7] FAN B,TAN G,FAN S. Comparison of Three different 2-Dspace vector PWM algorithms and their FPGA implementations[J]. Journal of Power Technologies,2014,94(3):176.
[8] PEDRO V,MARQUES G D. Four-wire current regu-lated PWMvoltage converter[J]. IEEE Transactions on Industrial Electron-ics,1998,45(5):761.
[9] MAN C,WONG J T. Cylindrical coordinate control of three-di-mensional PWM technique in three-phase four-wired trilevel invert-er[J]. IEEE Transactions on Power Electronics,2003, 18(1):208.
[10]邱赫男,王旭东,李志伟,等.基于五段式SVPWM的永磁同步电机反馈线性化直接转矩控制[J].哈尔滨理工大学学报,2015,20(6):65.QIU Henan,WANG Xudong,LI Zhiwei,et al. Feedback linear-ization direct torque control of permanent magnet synchronous mo-tor based on the five-stage SVPWM[J]. Journal of Harbin Uni-versity of Science and Technology,2015,20(6):65.
[11] WU W,ZHONG Y,DUAN B. A 3-D SVPWM without mediumvectors for 3-Phase 3-wire 3-level rec-tifier[C]//InternationalConference on Electrical M-achines and Systems. IEEE,2008:4199-4204.
[12] DAIN Y,WANG M,HAN Y. Application of a thr-ee-level NPCinverter as a three-phase four-wire power quality compensator bygeneralized 3DSVM[J]. IEEE Transactions on Power Electron-ics,2006,21(2):440.
[13]王裕,刘翔,谢运祥.三相四线制系统3D-SVPWM调制策略优化设计[J].华南理工大学学报(自然科学版),2015,43(8):21.WANG Yu,LIU Xiang,XIE Yunxiang. Optimization design ofthree-dimensional space vector pulse-width modulation strategy forthree-phase four-wire system[J]. Journal of South China Univer-sity of Technology(Natural Science Edition),2015,43(8):21.
[14] BEIG A R. Synchronized SVPWM algorithm for the over-modula-tion region of a low switching freque-ncy medium-voltage three-level VSI[J]. IEEE Transactions on Industrial Electronics,2012,59(12):4545.
[15] VODYAKHO O,MI C C. Three-level inverter-based shunt activepower filter in three-phase three-wire and four-wire systems[J].IEEE Transactions on Power Electronics,2009,24(5):1350.
[16] BEIG A R,NARAYANAN G,RANGANATHAN V T. ModifiedSVPWM algorithm for three level VSI with synchronized and sym-metrical waveforms[J]. IEEE Transactions on Industrial Elec-tronics,2007,54(1):486.
[17] XIA C,SHAO Hongjun,YUN Zhang,et al. Adjustable propor-tional hybrid SVPWM strategy for neutral-point-clamped three-level inverters[J]. IEEE Transactions on Industrial Electronics,2013,60(10):4234.
[18] LANGER N,BHAT A H,AGARWAL P. Neural-network-basedspace-vector pulse-width modulation for capacitor voltage balan-cing of three-phase three-level improved power quality converter[J]. Power Electronics,IET,2014,7(4):973.
[19] LEON J I,SERGIO V,RAMAON P,et al. Three-dimensionalfeedforward space vector modulation applied to multilevel diode-cla-mped converters[J]. IEEE Transactions on Industrial Elec-tronics,2009,56(1):101.
[20]薛硕,申淑丽,吴迪.三电平逆变器简化3D-SVPWM策略研究[J].大功率交流技术,2017(1):9.XUE Shuo,SHEN Shuli,WU Di. Research on simplified 3D-SVPWM method for three-level inverter[J]. High Power Convert-er Technology,2017(1):9.