CAJ | 학술논문

对二极管箝位型和飞跨电容型两种三电平变流器拓扑的多载波PWM(脉冲宽度调制)控制策略进行研究,重点对这两种拓扑结构中存在的中点电位不平衡问题,以及不同拓扑结构所适用的多载波PWM方法,进行了理论分析和论证;通过 Matlab/Simulink软件的仿真研究,分析了在不同调制度下输出电压的谐波分布和谐波畸变率,确定了载波层叠法与载波移相法的拓扑结构实用类型,论证了多载波PWM控制策略的实用性和可行性.
대이겁관겸위형화비과전용형량충삼전평변류기탁복적다재파PWM(맥충관도조제)공제책략진행연구,중점대저량충탁복결구중존재적중점전위불평형문제,이급불동탁복결구소괄용적다재파PWM방법,진행료이론분석화론증;통과 Matlab/Simulink연건적방진연구,분석료재불동조제도하수출전압적해파분포화해파기변솔,학정료재파층첩법여재파이상법적탁복결구실용류형,론증료다재파PWM공제책략적실용성화가행성.
This paper presents researches on the pulse width modulation(PWM) strategies and the principal for three-level diode-clamped and flying-capacitor converters,especially,the neutral-point unbalanced problem and the control strategies for different topological structures.An investigation was made of the harmonic wave distribution and the aberration rate of the line-voltage in different modulation rates on the basis of the Matlab/Simulink software,which determines the practical topology types in two different modulation strategies(phase disposition and phase shift).Both the theoretical and experimental results prove its practicability and feasibility.