DC Power Distribution System and Its Protection Configuration

In order to absorb renewable energy and electric vehicles, the typical design and protection scheme of AC/DC power distribution system are studied. Firstly, the advantages of DC distribution are analyzed from the point of view of power grid and users. Secondly, the energy router is configured as the system energy supply center and conversion hub, and the typical topology structure is designed. Finally, in order to solve the problems of fault location, isolation and self-healing, the fault current precise control and selective cutting technology based on source and load characteristics are adopted, and the multi-voltage level DC distribution network frame is constructed for verification.