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关于改进飞跨电容多电平变换器的移相PWM技术

On Improving Phase-Shifted PWM for Flying Capacitor Multilevel Converters

语言:

中文摘要

本文提出了一种针对飞跨电容(FC)多电平变换器的改进型移相脉宽调制(PS-PWM)技术。传统PS-PWM在处理线电压时存在非相邻电平切换问题,导致谐波性能下降。该方法通过优化调制策略,确保线电压始终在相邻电平间切换,从而显著提升了输出电压质量。

English Abstract

This letter proposes a phase-shifted pulse-width modulation (PS-PWM) technique for the flying capacitor (FC) multilevel converter that improves the quality of the line-to-line voltages. In traditional PS-PWM, the line-to-line voltages include intervals that switch between nonadjacent voltage levels, which deteriorates the harmonic performance. The proposed PS-PWM constantly achieves line-to-line v...
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SunView 深度解读

飞跨电容(FC)多电平拓扑在提升功率密度和降低输出谐波方面具有显著优势,适用于阳光电源的高功率密度组串式逆变器及大型储能变流器(如PowerTitan系列)。该改进型PS-PWM技术通过优化线电压谐波,有助于减小输出滤波器体积,进一步提升系统效率和并网电能质量。建议研发团队评估该调制策略在三电平及以上拓扑中的计算复杂度,并探索其在提升中高压储能变流器并网性能方面的应用潜力。