The need for a multilevel inverter for medium voltage high power applications has attracted researchers and industrialists to focus on the design of hybrid multilevel inverter topology that uses a considerably lesser number of switches and sources. This paper proposes a symmetrical and asymmetrical multilevel inverter with reduced switches. The novelty of the proposed arrangement is lesser ON state switches and reduced total blocking voltages across switches. The optional series connection of the basic unit increases output voltage levels with high‐quality output voltage. There are multiple algorithms proposed by varying the DC sources to generate different voltage levels using the same configuration. A suitable comparison is presented with conventional topologies and inverters of the same structure. The proposed topology is simulated and validated on hardware setup for both 7 levels, symmetrical and 15 levels, asymmetrical is performed using dSPACE 1104 controller. The impact of change in modulation index on the power and efficiency of the proposed 15‐level inverter is validated under laboratory setup. The feasibility of this topology favors renewable energy integration applications.

中文翻译：

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紧凑的对称和不对称多电平逆变器，开关减少

对于中压大功率应用的多电平逆变器的需求吸引了研究人员和工业家关注于混合多电平逆变器拓扑的设计，该拓扑使用数量少得多的开关和电源。本文提出了一种具有减少开关的对称和非对称多电平逆变器。所提出的布置的新颖性在于较小的导通状态开关和减小的开关两端的总阻断电压。基本单元的可选串联连接可提高输出电压水平和高质量输出电压。通过使用相同配置改变直流电源以产生不同的电压电平，提出了多种算法。与常规拓扑和相同结构的逆变器进行了适当的比较。拟议的拓扑在硬件设置上针对对称和15个级别的7个级别进行了仿真和验证，使用dSPACE 1104控制器执行了非对称。调制指数的变化对所建议的15级逆变器的功率和效率的影响已在实验室设置下得到验证。这种拓扑的可行性有利于可再生能源集成应用。