Reduced common mode carrier-based modulation strategies for cascaded multilevel inverters

Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344) Pub Date : 2002-12-10 DOI:10.1109/IAS.2002.1043807

P. Loh, D. G. Holmes, Y. Fukuta, T. Lipo

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引用次数: 36

Abstract

This paper presents carrier-based modulation strategies for cascaded multilevel inverters that substantially eliminate common mode voltage on the output phases. The paper begins by developing generic multilevel inverter reference waveforms that use only "allowed" space vectors to achieve reduced common mode voltage. A graphical technique is then proposed that allows various carrier disposition modulation strategies for a diode clamped inverter to be converted to equivalent modulation of a cascaded inverter for any fundamental reference waveform. This graphical technique is confirmed for both alternative phase opposition disposition (APOD) and phase disposition (PD) equivalent modulation of a cascaded inverter, and is then used to create reduced common mode modulation strategies for cascaded inverters from their equivalent counterparts for diode-clamped inverters under both continuous and discontinuous switching conditions. The strategies have been confirmed by both simulation and experimental results obtained using a cascaded five-level inverter.

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级联多电平逆变器的减少共模载波调制策略

本文提出了一种基于载波的级联多电平逆变器调制策略，该策略实质上消除了输出相位上的共模电压。本文首先开发通用的多电平逆变器参考波形，仅使用“允许的”空间矢量来实现降低共模电压。然后提出了一种图形技术，允许二极管箝位逆变器的各种载波配置调制策略转换为任何基本参考波形的级联逆变器的等效调制。这种图形技术在级联逆变器的可选相位对立配置(APOD)和相位配置(PD)等效调制中得到证实，然后用于在连续和不连续开关条件下创建与二极管箝位逆变器等效对应的级联逆变器的减少共模调制策略。采用级联五电平逆变器的仿真和实验结果验证了上述策略的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344)

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