This paper implements a 125 level asymmetric cascaded multilevel inverter using fuzzy logic which is used in the dynamic voltage restorer. The inverter is designed with a reduced number of switches. The higher switching frequency is defined for the better performance of the multilevel inverter. The 125 level output is obtained in this proposed approach with only twelve switches and six voltage sources. By changing the switching frequency, the proposed output voltage level is obtained in the inverter. The paper is organized into two phases. In the first step the design of 125 level inverter is proposed, and in the second phase, the power quality improvement using the designed inverter is discussed. The proposed design of an inverter is implemented for dynamic voltage restorer solves the power quality problems such as are voltage sag, voltage swell, and harmonics. The power quality issue mitigation performance is increased with the proposed 125 level inverter. The enrichment of the proposed design is investigated using the comparison of existing works. The proposed work is implemented in the Matlab/Simulink environment.

中文翻译：

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基于模糊控制器的125电平非对称级联多电平逆变器设计。

本文利用动态电压恢复器中使用的模糊逻辑实现了一个125电平的非对称级联多电平逆变器。逆变器的开关数量减少了。为了使多电平逆变器具有更好的性能，定义了较高的开关频率。在这种建议的方法中，只有十二个开关和六个电压源才能获得125电平输出。通过改变开关频率，可以在逆变器中获得建议的输出电压电平。本文分为两个阶段。第一步，提出了125级逆变器的设计，第二阶段，讨论了使用设计的逆变器改善电能质量的方法。为动态电压恢复器实施的逆变器设计方案解决了电能质量问题，例如电压骤降，电压骤升，和谐波。所建议的125级逆变器提高了电能质量问题缓解性能。通过对现有作品进行比较，对所提出的设计进行了研究。拟议的工作在Matlab / Simulink环境中实现。