Implementation of Space Voltage PWM Method and Neutral-Point Voltage Control for Single-Phase Three-Level Rectifiers
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摘要: 通过分析单相电压型三电平中点钳位(NPC)整流器的工作原理、传统单相三电平空间电压矢量调制(SVPWM)和中点电位控制方法的缺点,提出了一种改进的SVPWM算法和中点电位控制方法,并进行了计算机仿真和小功率实验样机试验.理论分析、计算机仿真和试验结果表明:在保证开关频率恒定的情况下,该SVPWM算法开关损耗小,输出PWM脉冲具有对称性,可使交流侧电流的高次谐波分布在2倍开关频率附近,且易于用DSP(数字化处理器)实现;无论负载是否变化,该中点电位控制方法均能有效解决中点电位不平衡的问题,具有较强的抗干扰能力,且易于实现.Abstract: An improved SVPWM (space voltage pulse width modulation) method and a novel neutral-point voltage control method were proposed by analyzing the operating principle of single-phase three-level NPC (neutral-point-clamped) voltage-source rectifiers and the disadvantages of the conventional single-phase three-level SVPWM and the neutral-point voltage control method. In addition,a computer simulation was done,and a low power prototype was designed and implemented. The theoretic analysis,computer simulation and experiment results show that in the condition of a constant frequency,the SVPWM method can obtain litter switch wasting and symmetric PWM drive signals,the high harmonic frequencies of the line current is close to twice switch frequency,and the method is easy to implement in DSP (digital signal processor). Whether the load is variational or constant,the proposed neutral-point voltage control method can solve the neutral-point voltage problem effectively and resist disturbance strongly,and it is easy to implement.
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黄济荣.电力牵引交流传动与控制[M].北京:机械工业出版社,1998.[2] 李伟,张黎.交-直-交传动系统网侧变流器预测电流控制方法的计算机仿真及实现[J].中国铁道科学,2002,23(12):49-54.LI Wei,ZHANG Li.Implementation and computer simulation of a converter control for AC-DC-AC driver system[J].China Railway Science,2002,23(12):49-54.[3] 邹仁.四象限变流器瞬态电流控制的仿真研究[J].机车电传动,2003,6(11):17-20.ZOU Ren.Simulation study on transient current control of four quadrant converter[J].Electric Drive for Locomotive,2003,6(11):7-20.[4] SHEN J,BUTTERWORTH N.Analysis and design of a three-level PWM converter system for railway-traction applications[J].IEE Proceedings Electric Power Applications,1997,144(5):357-371.[5] CHEOK A D,KAWAMOTO S,MATSUMOTO T,et al.Hish power AC/DC converter and DC/AC inverter for high speed train applications[C]//Proceeding of TECON.New York:IEEE Press,2000:423-428.[6] CHANG G W,LIN H W CHEN S K.Modeling characteristics of harmonic currents generated by hish-speed railway traction drive converters[J].IEEE Trans.on Power Delivery,2004,19(2):766-773.[7] CHAO K H,CHEN P Y,CHENG C H.A three-level converter with output voltage control for high-speed railway tractions[C]//The 33rd Annual Conference of the IEEE Industrial Electronics Society(IECON).New York:IEEE Press,2007:1793-1798.[8] LIN B R,LU H H.A Novel PWM scheme for single-phase three-level power-factor correction circuit[J].IEEE Trans.on Industrial Electronics.2000.47(2):245-252.[9] 宋文胜,冯晓云,蒋威.一种单相三电平NPC整流器的SVPWM控制方法[J].电工技术学报,2007,22(7):69-73.SONG Wensheng,FENG Xiaoyun,JIANG Wei.A space voltage pulse width modulation method for single phase three-level NPC voltage-surce rectifier[J].Trans.of China Electrotechnical Society,2007,22(7):69-73.[10] OSAWA C,MATSUMOTO Y,MIZUKAMI T,et al.A state-space modeling and a neutral point voltage control for an NPCpower converter[C]∥Power Conversion Conference.Nagaoka:IEEJ Press,1997:225-230.[11] SALAET J,ALEPUZ S,GILABERT A,et al.Comparison between two methods of dq transformation for single phase converters control.application to a 3-level boost rectifier[C]∥,The 35th IEEE PESC.New York:IEEE Press,2004:214-220.[12] SALAET J,ALEPUZ S,GILABERT A,et al.D-Q modeling and control of a single phase three-level boost rectifier with power factor correction and neutral-point voltage balancing[C]∥The 33th IEEE PESC.New York:IEEE Press,2002:514-519.[13] SONG J H,CHO S J,CHOY I,et al.New PWM method for single-phase three-level PWM rectifiers[C]∥Proceedings,ofthe International Symposium on Industrial Electronics.New York:IEEE Press,1997:283-287.[14] SALAET J,CANO A,GIMENO L M,et al.Adaptive balancing of the neutral point voltage in a single-phase three-level rectifier[C]∥IEEE Compatibility in Power Electronics.New York:IEEE press,2005:108-113.[15] SALAET J,GILABERT A.BORDONAU J,et al.Nonlinear control of neutral point in three-level single-phase converter by means of switching redundant states[J].Electronics Letters,2006,42(5):304-306.[16] FLINDERS F,OGHANNA W.A new minimum input distortion,model following controller for single phase pwm rectifiers[C]∥Proceedings of the IEEE International Symposium on Industrial Electronics.New York:IEEE Press,1997:606-611.
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