多电平变换器PWM控制技术研究现状综述及最新进展

近年来,多电平变换器成为高压、大功率电力电子系统应用领域的一个研究热点,而多电平脉宽调制PWM(pulse width modulation)控制方法是多电平变换器研究领域的核心问题之一.首先,阐述了3种载波PWM控制方法,并根据不同的控制指标介绍了各类优化载波PWM控制方法;其次,介绍了传统空间矢量脉宽调制SVPWM...

Overview of PWM Control Technology for Multi-level Converters and Its Recent Progress

In recent years, multi-level converters have become a research hotspot in the application field of high-voltage and high-power power electronic systems, and the multi-level PWM control method is one of the core issues in the research field of multi-level converters.In this paper, three kinds of carrier PWM control methods are described first, and various optimized carrier PWM control methods are introduced according to different control indexes. Secondly, the traditional space vector PWM algorithm is introduced, and the space vector PWM under different coordinate transformations is introduced in detail according to the algorithm optimization and control index, and the application of virtual space vector PWM and various optimized virtual space vector PWM derived from it in midpoint voltage balance control are emphasized. Finally, the essential relationship between n-level arbitrary segment multilevel SVPWM modulation and SPWM is introduced, and the optimized PWM algorithm proposed based on its unity.