Review on DC Distribution Network Protection Technology with Distributed Power Supply

With the rapid development of power electronics technology, DC distribution network has technical and economic advantages in many fields and has great development space. In this paper, the topology of the DC distribution network with two power supply “hand in hand” is taken as the research object, and the protection configuration of the DC distribution network is discussed. By analyzing the fault type, fault detection, fault identification, fault location and fault isolation process of DC distribution network. The key problems and technical difficulties faced by DC distribution network protection are proposed. Finally, the future development direction of DC distribution network protection technology is prospected, which lays a foundation for subsequent research.