Abstract

A novel asymmetrical cascaded one-twenty-five level multilevel inverter is proposed with optimal components. The proposed inverter consists of three sub-cells connected asymmetrical configuration to generate a 125-level output voltage. The sub-cell comprises six power switches and two DC sources to produce five output voltage levels with symmetrical configuration. This paper presents the five, twenty-five, one-twenty five-level inverters with optimal components with very lower harmonics. The results of the proposed inverters are experimentally tested with linear and non-linear loads. During dynamic circumstances, the suggested inverters are extremely stable. The proposed inverters will generate a greater voltage level with nominal harmonics as per IEEE standards. A complete comparison is made with previously published similar MLIs with proposed twenty-five MLI. The Proposed MLI has several merits such as cost factor, optimal components, THD, and TSV. The proposed five, twenty-five, and one-twenty-five level inverters are experimentally implemented with the help of the dSPACE RTI1104 controller. The proposed inverters are well suited for grid-connected and renewable applications.

摘要

提出了一种具有最佳元件的新型非对称级联二十五电平多电平逆变器。所提出的逆变器由三个子电池组成，这些子电池以非对称配置连接，以产生 125 级输出电压。子电池包括六个电源开关和两个直流电源，以产生具有对称配置的五个输出电压电平。本文介绍了具有极低谐波的最佳组件的五电平、二十五电平、二十五电平逆变器。所提出的逆变器的结果用线性和非线性负载进行了实验测试。在动态环境下，推荐的逆变器非常稳定。根据 IEEE 标准，提议的逆变器将产生具有标称谐波的更高电压电平。与之前发布的类似 MLI 以及提议的 25 个 MLI 进行了完整的比较。拟议的 MLI 有几个优点，例如成本因素、最佳组件、THD 和 TSV。在 dSPACE RTI1104 控制器的帮助下，通过实验实现了建议的 5、25 和 125 电平逆变器。提议的逆变器非常适合并网和可再生应用。