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电网技术  2014 

基于导抗网络的电压型隔离双向DC/DC变换器

DOI: 10.13335/j.1000-3673.pst.2014.02.024, PP. 424-430

Keywords: 双向直流变换器,导抗网络,降压模式,升压模式,单位功率因数,回流功率,微电网

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Abstract:

根据导抗网络的基本特性,提出一种新型双向直流变换器(bidirectionalDC/DCconverter,BDC)。分析了所提双向变换器在boost模式和buck模式下电路的工作模态。由导抗网络的基本特性可知,在任意的工作模式下,都可保证变换器中全桥变换器交流侧的功率因数为1,可使回流功率为零以提高系统效率。分析了双向变换器中的物理量关系,给出了变换器中变压器、导抗网络参数优化设计的规则,提出了双向变换器的信号调制策略及相应控制策略。实验结果表明所提BDC性能优良。

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