交错三电平双向DC-DC变换器及潮流控制

2018 3rd International Conference on Intelligent Green Building and Smart Grid (IGBSG) Pub Date : 2018-04-22 DOI:10.1109/IGBSG.2018.8393534

Zhizhong Kan, Pengcheng Li, Ranran Yuan, Chunjiang Zhang

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引用次数: 9

摘要

本文提出了一种适用于高压、高功率应用的交错三电平双向DC-DC变换器拓扑结构，该拓扑结构简单，适用于单母线直流微电网。三电平逆变器开关管电压应力降低到高压侧输出的一半，而交错并联技术可以降低电感值，提高变换器动态性能，扩大变换器容量，适用于储能装置。分析了所提出的交错三电平双向DC-DC变换器的工作原理以及占空比对工作状态的影响。提出了变换器飞电容电压控制方法，研究了双向功率控制方法和模式切换，实现了功率的双向流动。最后对实验结果进行了分析，验证了交错三电平双向DC-DC变换器的正确性和变换器控制策略的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Interleaved three-level bi-directional DC-DC converter and power flow control

An interleaved three-level bi-directional DC-DC converter topology was proposed for high voltage, high power applications in the paper, which has simple structure and is suitable for single bus DC microgrid. The three-level inverter switching tubes voltage stress decrease to a half of the output of the high voltage side, while the interleaved parallel technology can reduce the inductance value, improve the converter dynamic performance and enlarge the converter capacity for applications in the energy storage units. The operating principle of the proposed interleaved three-level bi-directional DC-DC converter as well as the influence of the duty cycle on the operating state were analysed. The converter flying capacitor voltage control was presented, bidirectional power control method and the mode switching was studied in order to realize the bidirectional flow of power. Finally the experimental result is analysed to verified the correctness of the interleaved three-level bi-directional DC-DC converter and the effectiveness of the converter control strategy.

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来源期刊

2018 3rd International Conference on Intelligent Green Building and Smart Grid (IGBSG)

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