交直流配电网典型形态特征对比与应用模式

Comparison of Typical Configuration Characteristics and Application Mode of AC/DC Hybrid Distribution Network

作为未来配电网的重要发展方向,交直流配电网方面的研究目前仍处于初始阶段,关于未来交直流配电网形态特征与应用模式的研究还不够充分和全面。该文首先总结国内外对直流配电网典型拓扑结构的研究,并阐述影响拓扑选取的原则;其次,针对连接交、直流配电网的关键设备包括换流器、软开关(soft open point,SOP)、电力电子变压器(power electronic transformer,PET)的基本特征进行简要阐述;再次,从这三种交直流转换装置组网的角度出发,研究交直流配电网的形态特征及适合的应用模式;最后,对比基于三种不同互联装置的交直流配电网在设备组网形态、网架结构发展两方面的差异,为构建新型交直流配电网提供参考思路。

As an important development direction of the future distribution network,AC/DC hybrid distribution network is still in the initial research stage,and the research on the configuration characteristics and application mode of the future AC/DC distribution network is not comprehensive.This paper firstly summarizes the research on typical topologies of DC distribution network,and expounds the principles that influence the selection of topology.Secondly,the basic characteristics of the key equipment connecting AC and DC distribution network,including converter,soft open point and power electronic transformer,are briefly described.Thirdly,from the perspective of networking of these AC/DC conversion devices,the paper studies the configuration characteristics of AC/DC distribution network and the suitable application mode.Finally,the differences in equipment configuration and structure development of AC/DC distribution networks based on three different interconnection devices are compared.It provides a reference for constructing a new AC/DC distribution network.