The New Hybrid Multilevel Inverter with Reduced Number of Switches

2021 IEEE 11th International Conference on System Engineering and Technology (ICSET) Pub Date : 2021-11-06 DOI:10.1109/ICSET53708.2021.9612532

L. K. Haw, Nur Atiqah Jefry, Wong Kiing Ing

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Abstract

This paper extended the findings of the previously proposed multilevel inverter (MLI) topology to produce 51-level of AC output voltage waveform in hybrid configuration. The proposed topology is structured by merging the feature of Cascaded H-bridge Multilevel inverter (CHB-MLI) and the Diode Clamped Multilevel Inverter (DC-MLI). When compared with the previous work, this proposed topology utilized 1 additional DC voltage source plus 4 switches (i.e., making it a total of 23 components) to achieve the aforementioned outcome. With such great number of voltage level being generated, the proposed topology also meets the total harmonic distortion (THD) limit set by IEEE standard (i.e., 5%) across the selected ranges of modulation indexes (i.e., 0.3 to 1). Through the simulation conducted via Matlab/Simulink, the variations between the number of voltage level, THD, and its RMS voltage are being analyzed and thoroughly discussed. The comparison of the proposed topology against the recently presented topologies are also carried to strengthen its novelty.

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减少开关数的新型混合多电平逆变器

本文扩展了先前提出的多电平逆变器(MLI)拓扑的研究结果，以产生混合配置下51电平的交流输出电压波形。该拓扑结构融合了级联h桥多电平逆变器(CHB-MLI)和二极管箝位多电平逆变器(DC-MLI)的特点。与之前的工作相比，该拓扑利用了1个额外的直流电压源和4个开关(即总共23个元件)来实现上述结果。由于产生如此多的电压电平，所提出的拓扑结构也满足IEEE标准规定的在调制指数范围(即0.3至1)内总谐波失真(THD)限值(即5%)。通过Matlab/Simulink进行仿真，分析并深入讨论了电压电平数、THD及其有效值电压之间的变化。将所提出的拓扑与最近提出的拓扑进行比较，以增强其新颖性。

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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2021 IEEE 11th International Conference on System Engineering and Technology (ICSET)

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