摘　要：介绍了双直流环结构电力电子变压器的拓扑和工作原理,对其各级子电路提出了相应的控制方案;分析了电力电子变压器的能量双向流动,并进行了仿真.仿真结果表明:电力系统中,双直流环结构电力电子变压器可以实现网侧电流灵活控制、电网接近单位功率因数运行,有较好的负载输出电压,还能实现能量双向流动.
关键词：电力电子变压器;脉冲宽度调制;能量双向流动
分类号：TM41 　文献标识码：A
文章编号：1004-9649(2007)10-0052-05

Research on bidirectional energy flow for power electronic transformer

DONG De-zhi　 SONG Yue　

作者简介：董德智(1980-),男,安徽六安人,硕士,从事电力电子在电力系统中应用及仿真研究.E-mail:dezhidong@126.com
作者单位：董德智（铜陵学院,电气工程系,安徽,铜陵,244000）　
　　　　　 宋玥（北京安泰恒业科技有限公司,北京,100097）　

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