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用于模块化多电平变换器电容电压纹波和开关损耗降低的闭环不连续调制技术

Closed-Loop Discontinuous Modulation Technique for Capacitor Voltage Ripples and Switching Losses Reduction in Modular Multilevel Converters

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中文摘要

本文提出了一种用于模块化多电平变换器(MMC)的新型不连续调制技术。该技术通过在原始调制信号中注入零序分量,使MMC桥臂钳位至直流母线的上下端。钳位间隔根据输出电流的绝对值进行控制,旨在有效降低电容电压纹波并减少开关损耗。

English Abstract

In this paper, a new discontinuous modulation technique is presented for the operation of the modular multilevel converter (MMC). The modulation technique is based on adding a zero sequence to the original modulation signals so that the MMC arms are clamped to the upper or lower terminals of the dc-link bus. The clamping intervals are controlled according to the absolute value of the output curren...
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SunView 深度解读

MMC拓扑在阳光电源的高压大功率储能系统(如PowerTitan系列)及大型地面光伏并网应用中具有重要研究价值。该文提出的闭环不连续调制技术能够显著降低开关损耗并优化电容电压纹波,这对于提升大型储能变流器(PCS)的效率、减小滤波电感体积以及延长电容寿命具有直接的工程指导意义。建议研发团队评估该调制策略在不同功率因数下的动态表现,并探索其在提升系统整体功率密度和降低散热成本方面的应用潜力。