Abstract This paper introduces a compact three-phase modular multilevel inverter (MMLI) based on asymmetrical input multi-terminal for different ratings of PV systems. The proposed three-phase inverter utilizes reduced component counts. It combines three half-bridge cells for each phase for 7-level output voltage generation. Therefore, the proposed MLI exhibits less number of switching devices for the cost aspects as well as control simplicity. The proposed inverter is analyzed for modular operation and supported by a vital comparative study to show the inverter merits. The proposed MMLI is investigated and analyzed using Matlab/Simulink. Finally, the MMLI is experimentally validated.

中文翻译：

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用于可再生能源应用的基于三相模块化多电平逆变器的多端非对称直流输入

摘要 本文介绍了一种基于非对称输入多端的紧凑型三相模块化多电平逆变器（MMLI），适用于不同额定值的光伏系统。建议的三相逆变器利用减少的组件数量。它为每相组合了三个半桥单元，以产生 7 级输出电压。因此，所提出的 MLI 在成本方面以及控制简单性方面表现出较少数量的开关设备。建议的逆变器针对模块化操作进行了分析，并得到了一项重要的比较研究的支持，以展示逆变器的优点。使用 Matlab/Simulink 对建议的 MMLI 进行了调查和分析。最后，MMLI 得到了实验验证。