一种新型级联多电平逆变器SVPWM控制

H桥级联多电平逆变器调速系统中，由于电压矢量数目过多而带来参考矢量计算困难及电压矢量优化选择问题，在对多电平系统电压矢量的特点和规律进行深入分析的基础上，提出了一种新型的电压空间矢量控制算法。基于这种算法能够很容易确定参考电压矢量的位置和各矢量的作用时间，并且计算的复杂度不受逆变器电平数的影响，可以用在任何高电平级联型H桥逆变器中。通过五级H桥级联型逆变器驱动系统的仿真及实验验证了这种方法的有效性。

A NOVEL SVPWM CONTROL OF CASCADED H-BRIDGE MULTILEVEL INVERTER

To solve the problem of reference vector computational complexity in multilevel inverters due to the large number of space vectors and redundant switching states, a novel voltage space vector pulse width modulation （SVPWM） control algorithm was developed by analyzing the characteristics of the voltage vectors. Based on this algorithm, the location of the reference voltage vector can be easily determined and the calculation of dwell times becomes very simple. It is also mentioned that the calculation complexity of the SVPWM is uninfluenced by the number of inverter levels, and it can be used in any high voltage level H - bridge cascaded inverter. To verify the algorithms, a five cascaded H - bridge inverter drive system was constructed and simulation, the results validated the validity of this algorithm.