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一种用于减少开关数量的准Z源三电平逆变器中同时降低共模电压与平衡中点电压的新型调制方案

A Novel Modulation Scheme for Simultaneous Common-Mode Voltage Reduction and Neutral-Point Voltage Balance in the Reduced Switch Count Quasi-Z-Source Three-Level Inverter

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中文摘要

本文提出了一种针对减少开关数量的准Z源三电平逆变器(RSC-QZS-TLI)的新型调制方案。该拓扑在保持准Z源逆变器输入电流连续性优势的同时,有效降低了开关数量与系统成本。针对该拓扑面临的共模电压(CMV)高及中点电压(NPV)不平衡挑战,该方案通过优化调制策略,实现了系统性能的提升。

English Abstract

The reduced switch count quasi-Z-source three-level inverter (RSC-QZS-TLI) not only maintains the advantages of continuous input current in the conventional quasi-Z-source three-level inverter but also reduces the number of power switches and system cost. However, it inevitably faces the challenges of high common-mode voltage (CMV) and neutral-point voltage (NPV) imbalance, which threaten system s...
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SunView 深度解读

该研究针对的RSC-QZS-TLI拓扑在降低系统成本和提高功率密度方面具有潜力,与阳光电源的组串式逆变器及储能变流器(PCS)产品线高度相关。通过优化调制策略解决CMV和NPV平衡问题,有助于提升逆变器在复杂电网环境下的电磁兼容性(EMC)和输出电能质量。建议研发团队关注该调制方案在PowerTitan或PowerStack等储能系统中的应用可行性,特别是在需要高效率与紧凑设计的应用场景下,通过减少开关器件数量来进一步优化成本结构,同时利用该调制技术提升系统运行的可靠性与稳定性。