A power electronic transformer (PET) with multiport bidirectional resonant DC-DC converters for electric traction applications
A power electronic transformer (PET) with multiport bidirectional resonant DC-DC converters for electric traction applications
复制标题
用于电力牵引应用的具有多端口双向谐振 DC-DC 转换器的电力电子变压器 (PET)
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
Yongdong Li
中科院分区：
文献类型：
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作者：
Chunyang Gu;Zedong Zheng;Yongdong Li
提出了一种新型的多端口双向谐振DC-DC变换器的电力电子Transformer（PET）拓扑结构，该拓扑采用多个中频多绕组变压器实现隔离。该拓扑具有高功率密度和高效率的特点，是机车、高速动车组等电力牵引应用的理想解决方案。功率平衡可以通过Transformer的公共磁链来实现，使得PET端口的负载可以彼此不同。提出了三种多端口双向LLC谐振DC-DC变换器的控制策略，适用于LC参数相差较小的独立和并联次级直流环节。仿真和实验结果验证了所提出的拓扑结构和控制策略。
A novel power electronic transformer (PET) topology with multiport bidirectional resonant DC-DC converters is proposed where several medium-frequency multi-winding transformers is applied to realize the isolation. The topology is with high power density as well as high efficiency, which is a appropriate solution for electric tracton application like locomotives and high speed EMU trains. The power balancing could be realized by common flux linkage of the transformer, so that the load of the PET ports can be different from each other. Three control strategies of the multiport bidirectional LLC resonant DC-DC converters are proposed for either independent and paralleled secondary DC links with small LC parameter difference. Simulation and experimental results are given to validate the proposed topology and control strategies.