四电平二极管箝位逆变器调制方法的比较

随着高压技术的发展,逆变器的容量要求越来越高,由于电力电子器件的限制,传统的两电平逆变器的容量已经很难达到大功率的要求.因此各国的科技工作者不断地提出了各种性能优越的新型多电平逆变器拓朴结构.介绍了四电平中点箝位逆变器的拓扑结构、特点以及工作原理,并对电压移位调制PWM技术中的IPD、POD和APOD3种排列方式及原理进行了详细说明.通过仿真和实验研究,给出了3种排列方式下电流iA、相电压VAN和线电压VAB的仿真波形和频谱图.

Comparison of voltage shifted modulation technology in four-level diode clamping inverter

With the development of high voltage technology,the requirement for the inverter capacity is higher and higher,but the traditional two-level inverter capacity can't meet the requirements of high power system due to the restriction of the electronic devices.In this paper we introduced the topology,characteristics and mechanism of four-level diode clamping inverter,illustrated the arrangement and mechanism of IPD,POD and APOD in voltage shifted modulation.Finally,the simulation waveforms and spectrogram of th...