A generalized diode containing bidirectional topology for multilevel inverter with reduced switches and power loss,International Journal of Circuit Theory and Applications

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A generalized diode containing bidirectional topology for multilevel inverter with reduced switches and power loss
International Journal of Circuit Theory and Applications ( IF 1.8 ) Pub Date : 2021-05-30 , DOI: 10.1002/cta.3077
Babak Hosseini Montazer ₁ , Javad Olamaei ₂ , Majid Hosseinpour _{1,

3} , Babak Mozafari ₄

Affiliation

Multilevel inverters (MLIs) have made great strides in utilizing renewable energy and industrial applications compared to conventional two-level inverters in terms of output voltage quality, smaller size of the output filter, and higher efficiency. This paper describes a new diode containing bidirectional topology for single-phase MLI. This structure is presented to reduce the count of switches, isolated voltage sources, and drivers that can increase the number of output levels modularly. This converter, despite the use of diodes, can feed bidirectionally the low power factor inductive–resistive loads. The proposed structure has been designed to achieve a higher output voltage levels relative to the number of switches, drivers, and direct current (DC) voltage sources. Three different algorithms have been proposed to determine the values of DC voltage sources. To confirm the superiority of the proposed structure, a detailed comparison has been carried out with other MLI topologies. Then the proposed topology is simulated in Matlab/Simulink environment using the nearest level modulation technique. Finally, experimental results are presented to confirm the performance of the designed structure in symmetric and asymmetric topologies.

中文翻译：

一种包含双向拓扑结构的广义二极管，用于减少开关和功率损耗的多电平逆变器

与传统的两电平逆变器相比，多电平逆变器（MLI）在输出电压质量、输出滤波器的更小尺寸和更高的效率方面在利用可再生能源和工业应用方面取得了长足的进步。本文介绍了一种包含用于单相 MLI 的双向拓扑结构的新型二极管。提出这种结构是为了减少开关、隔离电压源和驱动器的数量，可以模块化地增加输出电平的数量。尽管使用了二极管，该转换器仍可双向馈送低功率因数感阻负载。所提出的结构旨在实现相对于开关、驱动器和直流 (DC) 电压源数量更高的输出电压水平。已经提出了三种不同的算法来确定直流电压源的值。为了证实所提出结构的优越性，已经与其他 MLI 拓扑进行了详细的比较。然后使用最近电平调制技术在 Matlab/Simulink 环境中模拟所提出的拓扑。最后，给出了实验结果以确认所设计结构在对称和非对称拓扑中的性能。

更新日期：2021-05-30

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