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.
出处
《电气传动》
北大核心
2007年第12期26-30,共5页
Electric Drive
关键词
三电平PWM整流器
合成中矢量
中点平衡
three-level PWM rectifier synthesizing radial vector neutral point balance
