Direct single-phase isolated improved gamma Z-source AC–AC converter suitable for DVR application

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2024-03-11 DOI:10.1049/pel2.12681

Alireza Razavi Majarshin, Ebrahim Babaei, Arash Khoshkbar-Sadigh

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Abstract

A direct single-phase isolated improved gamma Z-source AC–AC converter is designed and manufactured in proposed paper. This converter contains an impedance source structure and its advantages. In general, these advantages are as follows. Firstly, the proposed structure has a wide range of output voltage as boost and buck as well as in-phase or out-of-phase states. Secondly, the proposed converter is electrically isolated thanks to a high frequency transformer (HFT), which significantly reduces the volume of the structure; therefore, in applications such as dynamic voltage restorer (DVR), there is no need to install a coupling transformer with the grid frequency which is very bulky and full of losses. Furthermore, the HFT of the proposed converter is a three winding transformer which also acts as the inductance needed for impedance source network. In addition, the safe commutation method has been utilized, which reduces the voltage spikes on the power switches. Finally, the analysis and design of this converter has been done, and then confirmed by a small-scale laboratory prototype.

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适合 DVR 应用的直接单相隔离改进型伽马 Z 源交流-交流转换器

本文设计并制造了一种直接单相隔离改进型伽马 Z 源交流-交流转换器。该转换器采用阻抗源结构，具有以下优点。总的来说，其优点如下。首先，所提出的结构具有升压和降压以及同相或非同相状态等多种输出电压范围。其次，由于采用了高频变压器（HFT），拟议的转换器实现了电气隔离，从而大大减小了结构的体积；因此，在动态电压恢复器（DVR）等应用中，无需安装与电网频率耦合的变压器，因为这种变压器非常笨重且充满损耗。此外，拟议变流器的 HFT 是一个三绕组变压器，它也是阻抗源网络所需的电感。此外，还采用了安全换向方法，从而减少了电源开关上的电压尖峰。最后，对该转换器进行了分析和设计，并通过小型实验室原型进行了确认。

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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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.