Research on key technologies of highly reliable flexible distribution facing tidal load

Under the background of steady development of DC transmission and distribution technology, a series of pilot projects and demonstrations have been carried out gradually in the Engineering application of DC distribution network. In this paper, the typical mode of low voltage DC distribution network- flexible distribution system, is taken as the main research object. The interface between low voltage DC distribution and AC distribution, the distributed energy resource and electric vehicle, and the characteristics of electrical load is considered synthetically. The DC voltage level, power supply radius and capacity, the mode of grounding and connection, and topology structure are analyzed and studied. The typical DC distribution structure is analyzed by simulation. And the DC network load mutual supply experiment system suitable for different scenarios is constructed.