单相PWM整流器谐波电流抑制算法研究  

Research on Harmonic Current Elimination Method of Single-phase PWM Rectifiers

作　　者：高吉磊[1] 张雅静[1] 林飞[1] 郑琼林[1] 

机构地区：[1]北京交通大学电气工程学院,北京市海淀区100044

出　　处：《中国电机工程学报》2010年第21期32-39,共8页Proceedings of the CSEE

摘　　要：单相脉宽调制(pulse width modulation,PWM)整流器广泛应用于交流传动领域,是交流传动电力机车主牵引和辅助供电系统的重要组成部分,同时也是牵引网的主要谐波源。详细分析牵引网谐波电压和直流电压脉动对单相PWM整流器网侧电流的影响,提出采用嵌入式重复控制和N次陷波器相结合的控制算法,对网侧谐波电流进行抑制。详细讨论电流环嵌入式重复控制器的设计方法,理论分析重复控制算法对牵引网谐波电压的抑制效果,给出电流环控制参数的选取原则。针对直流电压脉动,提出采用N次陷波器抑制其对网侧电流的影响,给出与电压环PI调节器相结合的设计方法,并讨论电压环的跟随性。最后,搭建单相PWM整流器的实验装置,对该算法进行实验验证。实验结果证明了该算法的正确性和有效性。Single-phase PWM rectifiers have been widely used in the field of AC electric drives. They have been playing important parts as main traction and power supply systems on board of electric trains. However,they are also harmonic current sources for traction grids. The affections on grid current caused by grid harmonic voltage and DC-link pulsating voltage was analyzed in this paper. The plug-in repetitive control method combined with DC-link voltage N-order notch filters was proposed to solve the problems. Design principles of current controller based on plug-in repetitive control have been given in details. The effectiveness of the method to eliminate harmonic current caused by grid harmonic voltage was analyzed in theory. For the affection of DC-link pulsating voltage,N-order notch filter was adopted and the detailed description of PI-controller ＋ notch filter design criteria was given to make sure the voltage loop stable. Experimental results verified the proposed method.

关 键 词：谐波电流 PWM整流器 重复控制 陷波器 稳定性 

分 类 号：TM46[电气工程—电器]