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首页> 外文期刊>Power Electronics, IET >A transformerless modular step-up dc??dc converter for high power applications
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A transformerless modular step-up dc??dc converter for high power applications

机译:适用于大功率应用的无变压器模块化升压型DC-DC转换器

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摘要

This study presents a new step-up dc-dc converter topology suitable for medium voltage, megawatt scale applications. The proposed converter interconnects unipolar or bipolar dc networks using a single inductor and a modular active switching network. The active switching network contains multiple series-connected identical converter modules. Each module consists of four switches and one capacitor. The modular nature of the switching network allows scalable implementation of the converter, and utilisation of low-voltage switches and capacitors. The proposed converter avoids the use of medium-frequency isolation transformers. Soft switching is utilised to reduce the converter's switching losses. An analytical model of the converter is developed to facilitate converter design. Theoretical predictions are supported by a 7.6 kW scaled laboratory prototype achieving an efficiency of as high as 93.2%.
机译:这项研究提出了一种适用于中压,兆瓦级应用的新型升压型DC-DC转换器拓扑。提出的转换器使用单个电感器和模块化有源开关网络将单极或双极直流网络互连。有源开关网络包含多个串联的相同转换器模块。每个模块由四个开关和一个电容器组成。开关网络的模块化特性允许转换器的可扩展实现,以及低压开关和电容器的利用。所提出的转换器避免了使用中频隔离变压器。利用软开关来减少转换器的开关损耗。开发了转换器的分析模型以促进转换器设计。理论预测得到7.6 kW规模的实验室原型的支持,效率高达93.2%。

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