基于MMC的混合开关电容DC-DC变换器

Marcus Vieira Soares, G. Lambert, Y. Rômulo de Novaes
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引用次数: 2

摘要

不同类型的dc-dc转换器一直是研究的主题,以满足互联可再生能源、现有或新的电网、电子负载和基于电池的系统的需求。为了解决高电压电平和大功率的问题,提出了基于模块化多电平变换器的结构。另一方面,对于较低的额定功率,开关电容器和混合开关电容器变换器由于其结构简单和自电压平衡特性而出现。在这种情况下,提出了一种基于模块化多电平变换器的非隔离混合开关电容dc-dc变换器,并通过电路分析对其单向结构进行了检验。在所提出的变换器中,电压静态增益与子模块的数量无关,允许高压应用的输出电压的良好调节范围。此外,开关电容的行为提供了臂电压的自动箝位,避免了交流回路执行臂电压平衡的需要。提出了一种基于电流尖峰限制的变换器设计方法。通过与仿真波形的比较,验证了理论分析和设计方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Hybrid Switched Capacitor DC-DC Converter Based On MMC
Different types of dc-dc converters have been subject of research to fulfill the need of interconnecting renewable generation sources, existing or new grids, electronic loads and battery based systems. To deal with high voltage levels and high power, Modular Multilevel Converter based structures have been proposed. On the other hand, for lower power ratings, Switched Capacitor and Hybrid Switched Capacitor converters have emerged due to their simple structures and self voltage balancing characteristics. In this scenario, a non-isolated Hybrid Switched Capacitor dc-dc converter based on Modular Multilevel Converter is proposed and its unidirectional structure is examined through circuit analysis. In the proposed converter, the voltage static gain is independent of the number of submodules, allowing a good regulation range of the output voltage for high voltage applications. Moreover, the Switched Capacitor behavior provides automatic clamp of the arms voltages, avoiding the need of ac loops to perform the arms voltage balance. A converter design methodology based on current spikes limitation is also proposed. All the theoretical analysis and the design methodology are validated through comparisons with simulated waveforms.
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