现代多电平逆变器的控制策略

Control Strategies for Novel Multilevel Converters

今天多电平逆变器已引起人们极大的兴趣,但是随着电平数的增加,控制的复杂性也随之增加,并且带来了电压不平衡等问题。文章对当今水平的多电平逆变器的调制技术和控制策略,如:多电平正弦脉冲宽度调制、空间矢量调制、多电平选择性谐波消除、空间矢量控制以及电容器平衡技术等,进行了系统的分析。

The multilevel inverter has drawn tremendous interest of engineers; however, a high number of levels increase the control complexity and introduce voltage unbalance problems. This paper systematically analyzes several modulations and control strategies for state-of-art multilevel inverters. They are multilevel sinusoidal pulse width modulation, space vector modulation, multilevel selective harmonic elimination, space vector control, capacitor balancing techniques etc.