中文摘要：

随着电力电子技术的发展,相比交流配电网,直流配电网在很多领域取得了技术和经济优势,具有巨大的发展前景。首先对直流配电的发展历程、优势及运行特点等进行了论述和分析;在此基础上,介绍了直流配电网在一些发达国家的研究现状与发展情况。其次,对直流配电网研究中的系统架构、控制技术、保护技术等关键问题和相关研究现状进行了全面的阐述。最后,对直流配电网在中国的发展进行了介绍和展望。

英文摘要：

With the development of power electronics technology, compared to the AC power distribution network, the DC power distribution network has tremendous potential for its obvious advantage in technology and economic. In this paper, firstly, the development history, advantages as well as operation features were described and analyzed. On this basis, the research and developments of DC power distribution network in various countries were summarized. Secondly, the key topics, such as system architecture, control and protection technologies, and their research developmentswere comprehensively expounded. At last, the development of DC power distribution network in China was introduced and forecasted.