基于LCL滤波的PWM整流器应用  

Application of Three-phase PWM Rectifier with LCL-filter

作　　者：谢萌[1] 刘志刚[1] 师睿[1] 

机构地区：[1]北京交通大学,北京100044

出　　处：《电力电子技术》2008年第7期24-25,共2页Power Electronics

基　　金：国家科技支撑项目(2006BAG02B00)~~

摘　　要：L滤波PWM整流器会产生开关频率及其倍数的高次谐波,因此提出采用LCL滤波减小谐波。考虑到LCL滤波元件存在谐振问题并影响系统的稳定性,提出了在滤波电容上串联电阻增加阻尼的方法避免谐振。此外,提出了滤波参数计算的方法。通过仿真表明,该策略能够减小高次谐波并具有较好的稳定性。实验结果证明了工程应用的可行性。To reduce the current harmonics around switching frequency of the three-phase pulsewidth modulation （PWM） rectifiers,a LCL filter is adopted.The addition of a LCL filter poses a problem of performance degradation and potential instability.A control method based on damping resistor in series with capacitance of LCL filter is presented.The results of simulative using Matlab show the validity of the proposed method.Moreover,the good agreement which was obtained through simulative and experimental results validate the proposed approach.

关 键 词：滤波器 脉宽调制/整流器 阻尼 谐振 

分 类 号：TM713[电气工程—电力系统及自动化]