中文摘要：

多端口变换器具有很多优势,研究并在电网中推广应用多端口变换器对电能的发、输、配、用都具有重要意义。首先,概述和总结了国内外在多端口变换器拓扑领域方面的最新研究进展;然后,结合智能电网的需求,从容量、效率、成本、可靠性方面分析了各种多端口拓扑的优缺点和适用范围;最后,在此基础上对大容量多端口变换器的拓扑构造方法进行展望。构造合适的能量传输路径,在保证足够的控制自由度条件下,通过器件或者模块复用的方式,简化主回路结构,减少变换级数,达到减小体积和降低成本、降低损耗的目的。

英文摘要：

The research and application of multi ports converter in power system is very important for power generation,transmission,distribution and consumption. First,recent advances in topology of multiport converters were reviewed and summarized in this paper. Then,considering the demand of smart grid,the advantages and disadvantages of various multi port topologies were analyzed in terms of capacity,efficiency, cost and reliability. On this basis, the topology construction method of high power multi port converter is prospected. The suitable energy transmission path is constructed under the condition of sufficient control degrees of freedom, and the main circuit is simplified and the number of energy transformations is reduced with the multiplex semiconductor devices of modules in the circuit,which can reduce the cost, the loss and the volume.