An Integrated Arm and Integrated Three-Phase Module DC-AC Modular Converter with Minimal Energy Storage Requirements
An Integrated Arm and Integrated Three-Phase Module DC-AC Modular Converter with Minimal Energy Storage Requirements
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DOI：
10.23919/icpe2023-ecceasia54778.2023.10213479
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发表时间：
2023-05
期刊：
影响因子：
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通讯作者：
Wiwin Lew;Mahima Gupta
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文献类型：
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作者：
Wiwin Lew;Mahima Gupta
模块化转换器在低到高电压应用中获得了普及，因为它是在21世纪初首次推出，由于设计的灵活性。传统的模块化变换器需要大的子模块电容来适应导致使用电解电容器的单相交流处理功率要求。各子模块中电解电容的使用增加了变换器的体积，影响了变换器的效率。本文提出了一种集成正、负臂和集成半桥模块的集成模块化拓扑结构。所提出的电路设计允许显著减少能量存储需求，因为每个开关周期的能量平衡，因此一个微小的共享电容器（几个微法拉对几个毫法拉）。转换器中所需的电容器数量也显著减少，因为在正负臂之间只需要一个电容器。该工作通过实验室规模的原型和电路仿真进行了实验验证。
Modular converters gained popularity in low to high voltage applications since it was first introduced in early 2000s due to the design flexibility. Conventional modular converters require large submodule capacitance to accommodate single-phase AC processing power requirement that lead to the use of electrolytic capacitors. The use of electrolytic capacitor in each submodule increases the converter volume and affects the efficiency of the converter. This paper presents an integrated modular topology with integrated positive and negative arms and integrated half-bridge modules. The proposed circuit design permits significant reduction in energy storage requirement due to energy balance per switching cycle and thus a tiny shared capacitor (few micro-farads versus several milli-farads). The number of capacitors required in the converter is also reduced significantly because only one capacitor is needed between the positive and negative arms. The work is verified experimentally using a laboratory-scale prototype and circuit simulations.