中文摘要：

直流配电系统适用于分布式电源多点接入,可促进直流家电和＂直流生态住宅＂的发展,是配电领域新的发展方向。继电保护技术是直流配电系统发展的关键技术之一,目前尚处于起步阶段,亟需深入研究。该文旨在系统地介绍国内外直流配电系统保护技术的研究状况。介绍了目前直流配电领域的三种保护设备,总结直流配电领域保护的研究现状,包括地铁、舰船直流配电的保护和直流配电系统的保护;重点介绍了直流配电系统故障定位和隔离,以及典型直流配电系统的整体保护配置方案。指出了目前直流配电系统保护亟需解决的关键问题和未来的发展方向。

英文摘要：

DC distribution system is suitable for multiple access of distributed generation, promoting the development of DC appliances and ＂DC eco-house＂. Therefore, it will be the development direction in distribution areas. Relay protection technology, which is one of the key technologies of the development of DC distribution system, still stays in its infancy and needs further study urgently. This paper aimed to systematically introduce the research situation about the protection technology of DC distribution system at home and abroad. Three types of protection equipment of DC distribution system were introduced. The paper summarized the protection research status in DC distribution areas, including the protection of DC distribution in subway and ships and that in power systems. The fault location and isolation of DC distribution system was mainly introduced. Moreover, the achievements of protection configuration of typical DC distribution system were also stated. The key issues of protection in DC distribution system at present were discussed and its future development direction was given.