A New Double-Switch SEPIC-Buck Topology for Renewable Energy Applications

IF 3 4区工程技术 Q3 ENERGY & FUELS

Energies Pub Date : 2024-01-02 DOI:10.3390/en17010238

Walid Emar, Haitham Issa, Hasan Kanaker, Osama Fares, Hani Attar

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引用次数: 0

Abstract

In addition to their conventional use in electric motor drives, DC-DC converters have a variety of other uses, such as energy storage, energy conversion, cyber security systems, uninterruptible power supplies, and renewable energy systems. An innovative DC-DC converter is suggested in this article. Designing a new, high-gain DC-DC converter scheme known as a double-switch SEPIC-buck converter (DSSB) is possible after making some adjustments to the SEPIC converter that is currently known in accordance with accepted techniques. The output voltage magnitude of the proposed converter is either larger than or less than the input voltage magnitude and is the same sign as the input voltage. According to the theoretical and analytical study that has been supported by the real-world application, high voltage gain, low switching stress, and low inductor current ripple are the main characteristics of the proposed DSSB converter. The related small-signal model was also used to build the closed-loop system. The frequency response and output voltage behavior were investigated when the input source voltage abruptly changed as a step function. Based on the comparison study with other DC-DC converters, the DSSB converter outperforms currently known DC-DC converters such as Buck, SEPIC, Boost, Buck-Boost, and other SEPIC converter topologies in terms of voltage gain, harmonic content, normalized current ripple, dynamic performance, and efficiency. Additionally, the frequency response and control of the proposed converter using an alternate current (AC), small-signal, analysis-based, current-mode control technique are both provided. Thus, the DSSB is regarded as safe in overcurrent situations because of the small-signal analysis with the current control strategy. As a result of the verification of the proposed control technique, the resistance to changes in the DSSB parameters, improved dynamic performance, and higher control accuracy are further advantages of current-mode control based on small-signal analysis over other control approaches (PI controllers). Finally, the experimental and simulation results from Simplorer 7 and MATLAB/Simulink are used to validate the findings of the analytical and comparative investigation.

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适用于可再生能源应用的新型双开关 SEPIC 降压拓扑结构

直流-直流转换器除了在电机驱动中的传统用途外，还具有多种其他用途，如能量存储、能量转换、网络安全系统、不间断电源和可再生能源系统。本文提出了一种创新型直流-直流转换器。在根据公认技术对目前已知的 SEPIC 转换器进行一些调整后，就可以设计出一种新的、高增益直流-直流转换器方案，即双开关 SEPIC 降压转换器（DSSB）。拟议转换器的输出电压幅值要么大于输入电压幅值，要么小于输入电压幅值，并且与输入电压的符号相同。根据已得到实际应用支持的理论和分析研究，高电压增益、低开关应力和低电感电流纹波是所提 DSSB 转换器的主要特点。相关的小信号模型也被用于构建闭环系统。研究了输入源电压作为阶跃函数突然变化时的频率响应和输出电压行为。根据与其他直流-直流转换器的比较研究，DSSB 转换器在电压增益、谐波含量、归一化电流纹波、动态性能和效率方面优于目前已知的直流-直流转换器，如降压、SEPIC、升压、降压-升压和其他 SEPIC 转换器拓扑结构。此外，还提供了频率响应以及使用交变电流（AC）、小信号、基于分析的电流模式控制技术对所建议的转换器进行控制的情况。因此，由于采用了电流控制策略的小信号分析，DSSB 被认为在过流情况下是安全的。经过对所提控制技术的验证，与其他控制方法（PI 控制器）相比，基于小信号分析的电流模式控制具有更强的抗 DSSB 参数变化能力、更好的动态性能和更高的控制精度。最后，Simplorer 7 和 MATLAB/Simulink 的实验和仿真结果用于验证分析和比较研究的结果。

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

Energies ENERGY & FUELS-

CiteScore

6.20

自引率

21.90%

发文量

8045

审稿时长

1.9 months

期刊介绍： Energies (ISSN 1996-1073) is an open access journal of related scientific research, technology development and policy and management studies. It publishes reviews, regular research papers, and communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced.