Analysis and Investigation of a Simple and Extendable DC-DC Converter to Obtain High Voltage-Gain for Renewable Energy Applications

2022 IEEE Industry Applications Society Annual Meeting (IAS) Pub Date : 2022-10-09 DOI:10.1109/IAS54023.2022.9939964

Peyman Alavi, N. Chaudhuri

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Abstract

In this article, an extendable high step-up DC-DC converter is proposed and investigated. The topology of the proposed converter is simple, and despite other similar structures, this converter does not implement switched-capacitor (SC) cells, switched-inductor (SI) cells, diode-capacitor-inductor (DCL) cells, or coupled inductors to enhance the voltage gain. In addition to the simple topology of the proposed converter, its high voltage-gain and reduced voltage stresses across the elements can be listed as the main advantages of this structure. In this paper, the proposed extendable high step-up converter is explained, and its operational modes are investigated comprehensively. The voltage stress across different elements and the voltage gain of the proposed converter are obtained. In addition, a 2-stage model of the proposed converter is designed for efficiency investigation and compared to other similar topologies. Finally, the designed 2-stage (25-400V, 500W) model of the proposed converter is simulated in PSCAD/EMTC environment to verify the theoretical analysis.

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可再生能源应用中获得高电压增益的简单可扩展DC-DC变换器的分析与研究

本文提出并研究了一种可扩展的高升压DC-DC变换器。所提出的转换器的拓扑结构很简单，尽管有其他类似的结构，但该转换器没有实现开关电容(SC)单元，开关电感(SI)单元，二极管电容电感(DCL)单元或耦合电感来增强电压增益。除了所提出的转换器的简单拓扑结构外，其高电压增益和元件之间的低电压应力可以被列为该结构的主要优点。本文对所提出的可扩展高升压变换器进行了说明，并对其工作模式进行了全面的研究。得到了不同元件间的电压应力和变换器的电压增益。此外，本文还设计了该转换器的两级模型以进行效率研究，并与其他类似拓扑结构进行了比较。最后，在PSCAD/EMTC环境下对所设计的2级(25-400V, 500W)变换器模型进行了仿真，验证了理论分析。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2022 IEEE Industry Applications Society Annual Meeting (IAS)

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