Auxiliary power supply for medium-voltage power electronics systems
Auxiliary power supply for medium-voltage power electronics systems
复制标题
中压电力电子系统辅助电源
DOI：
10.1109/apec.2018.8341005
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
S. Lukic
中科院分区：
文献类型：
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作者：
Jehyuk Won;Gholamreza Jalali;Xinyu Liang;Chi Zhang;Srdjan Srdic;S. Lukic
提出了一种基于模块化多电平串并联变换器的中压电力电子系统辅助电源。该转换器在输入端连接到2.4 kV RMS，在输出端产生24 V直流电，提供100 W的功率和10 kV隔离。与使用电网频率庞大且沉重的电压互感器的传统解决方案不同，与传统方法相比，所提出的转换器可以在更高的开关频率下操作，从而减轻重量并提供更高的功率密度。此外，建议的转换器具有内部电容器电压平衡，并通过使用预测控制实现功率因数校正（PFC）。建议的转换器进行了仿真，其操作实验验证在低输入电压下的原型。
This paper presents an auxiliary power supply for medium-voltage (MV) power electronics systems, based on modular multilevel series-parallel converter (MMSPC). The converter connects to 2.4 kV RMS at the input, and produces 24 V dc at the output, providing 100 W of power with 10 kV isolation. Unlike the traditional solutions which use a grid-frequency bulky and heavy potential transformers, the proposed converter can operate at higher switching frequencies, thus reducing the weight and providing higher power density, compared to the traditional approach. Additionally, the proposed converter features an internal capacitor voltage balancing and achieves power factor correction (PFC) by using predictive control. The proposed converter is simulated and its operation is experimentally validated on the developed prototype at low input voltage.