The most prominent issue relevant to the initiative multi-level inverters is how to provide a high-step staircase quasi-sinusoidal voltage against low switch numbers. This paper presents an innovative asymmetrical multi-level inverter structured by cascaded sub-multi-level inverter bonded to H-bridge inverter to unravel aforesaid issue. DC power sources of sub-multi-level inverters have been determined based on an especial exponential model to provide zero and positive steps, and so, negative steps can be achieved using H-bridge inverter bonded to cascaded sub-multi-level inverters. From viewpoint of harmonic components of high level output voltage, high order harmonics must be indispensability eliminated. Toward this subject, Rectangular Incision-Selective Harmonic Elimination-Pulse Width Modulation (RI-SHEPWM) along with fractional values of DC sources have been scheduled to be the fundamental approach aimed at elimination of twenty-ninth, thirty-first and thirty-fifth harmonics. In according to the nature of multi-objective state of the problem, executing the multi-objective optimization method isn’t avoidable. Due to high performance of Multi Objective Bees Algorithm (MOBA) to solve the non-linear objectives, the elimination of these harmonics is formulated by pertinent fitness functions utilizing MOBA. Putting it all together, the pertinent deductive analysis as well as both the simulation and experimental outcomes have transparently corroborated the capability of the held forth asymmetrical multi-level inverter. Meanwhile, elimination of all determined high-order harmonics i.e., twenty-ninth, thirty-first and thirty-fifth harmonics utilizing RI-SHEPWM based on MOBA has been approved.

中文翻译：

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非对称多电平逆变器高次谐波的选择性消谐策略分析与应用

与主动多电平逆变器相关的最突出问题是如何针对低开关次数提供高阶阶梯准正弦电压。本文提出了一种创新的非对称多电平逆变器，它由级联亚多电平逆变器与 H 桥逆变器相连，以解决上述问题。子多电平逆变器的直流电源已根据特殊的指数模型确定，以提供零阶和正阶跃，因此，使用与级联亚多电平逆变器绑定的 H 桥逆变器可以实现负阶跃。从高电平输出电压的谐波分量来看，必须消除高次谐波。针对这个话题，矩形切口选择性谐波消除脉冲宽度调制 (RI-SHEPWM) 连同 DC 源的分数值已被安排为旨在消除二十九、三十一和三十五次谐波的基本方法。根据问题的多目标状态的性质，执行多目标优化方法是不可避免的。由于多目标蜜蜂算法 (MOBA) 在解决非线性目标方面的高性能，这些谐波的消除是通过利用 MOBA 的相关适应度函数制定的。综上所述，相关的演绎分析以及仿真和实验结果都清楚地证实了所提出的非对称多电平逆变器的能力。同时，