Improved Hold-Up Time for WBG-based Single-Phase Converters
Improved Hold-Up Time for WBG-based Single-Phase Converters
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DOI：
10.23919/epe.2019.8914818
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发表时间：
2019-09
期刊：
影响因子：
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通讯作者：
Rajesh Rajamony;Wenlong Ming
中科院分区：
文献类型：
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作者：
Rajesh Rajamony;Wenlong Ming
电源转换器的安全、不间断运行需要保持时间。这可以防止不必要的系统重置。本文研究了具有显著减小的直流电容的单相变换器的保持时间。选择所需的断开电容和辅助电容，以确保在输入电源故障后保持一定的时间。为了最大限度地利用脱链电压，本文提出了一种简化的中性点支路控制策略，保证了在保持状态下变流器的控制。提出了一种权衡设计策略，并与不加辅助电容的方案进行了比较。仿真研究验证了变换器的保持时间性能。
Hold-up time is required for the safe and uninterrupted operation of the power converters. This prevents unwanted resetting of the systems. In this paper, the hold-up time for a single-phase converter with siginificantly-reduced DC capacitors is investigated. The required de-link and auxiliary capacitors are selected to ensure a certain period of hold-up time after the input supply fails. To maximize the utilization of de-link voltage, this paper presents a simplified neutral leg control strategy and it has been ensured the converter control under hold-up operations. A trade-off design strategy is presented and the outcome has been compared with the solution without the auxiliary capacitor. Simulation studies were carried out to verify the hold-up time performance of the converters.