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Novel carrier-based hybrid pulse width modulation method for cascaded capacitor-clamp multilevel inverter

机译：级联电容钳位多电平逆变器的基于载波的新型混合脉宽调制方法

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摘要

This study presents a new carrier-based hybrid pulse width modulation (PWM) Method for the cascaded capacitor-clamp multilevel inverter (CCCMLI), which combines the benefits of a new alternative level-shifted carrier PWM and a phase-shifted carrier PWM. For modulating the CCCMLI, the phase disposition sub-harmonic PWM was first proposed, but does not show good performances in an even load sharing between inverter cells connected in series, flying-capacitor voltage balancing and output waveform quality. On the other hand, a proposed PWM method enables to achieve a balanced load sharing between cascaded cells even at low amplitude modulation indices as well as the excellent voltage balancing control of the flying-capacitors with a much smaller voltage ripple and the good harmonic characteristics in output waveforms. The proposed modulation is verified through both simulation and field-programmable gate array (FPGA) based experimental results.
机译：这项研究提出了一种用于级联电容钳位多电平逆变器（CCCMLI）的新的基于载波的混合脉宽调制（PWM）方法，该方法结合了新的可选电平移位载波PWM和相移载波PWM的优势。为了调制CCCMLI，首先提出了相位配置次谐波PWM，但在串联连接的逆变器单元之间的负载均衡分配，飞跨电容器电压平衡和输出波形质量方面没有表现出良好的性能。另一方面，提出的PWM方法即使在低幅度调制指数下也能够在级联单元之间实现平衡的负载分担，并且能够以极小的电压纹波和良好的谐波特性在飞电容器上实现出色的电压平衡控制。输出波形。通过仿真和基于现场可编程门阵列（FPGA）的实验结果验证了所提出的调制方式。

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