基于合成中矢量的三电平PWM整流器中点平衡新方法  

Novel Neutral Point Voltage Balance Method of 3-phase 3-level PWM Rectifier on Synthesizing Radial Vector

作　　者：伍文俊[1] 钟彦儒[1] 伍超[1] 

机构地区：[1]西安理工大学

出　　处：《电气传动》2007年第12期26-30,共5页Electric Drive

摘　　要：通过分析各种矢量对三相三电平PWM整流器中点电位的影响,提出了一种基于合成中矢量的新的5段式矢量调制算法。采用Matlab对新型5段式和传统7段式三电平PWM整流系统进行了对比仿真。结果表明,该法从中矢量入手,有效地解决了在小输出滤波电容情况下,PWM整流器瞬态过程中的中点电位不平衡问题。By analyzing the influences of all space vector upon the neutral point voltage of three-phase three-level PWM rectifier, a novel five-section vector modulating method based on synthesizing radial vector was proposed. The simulations of three-level PWM rectifier are completed by using the new five-section modulation and traditional seven-section modulation. The result shows that the transient neutral point voltage balance has effectively been controlled with new method under small capacitor.

关 键 词：三电平PWM整流器 合成中矢量 中点平衡 

分 类 号：TM461[电气工程—电器]