Network Structure and Power Quality of DC Distribution System: A Review

With the innovation of energies and technologies, DC distribution system (DDS) is an inevitable trend of the power system development. Thus, the voltage level and network structure of the DDS are firstly generalized in terms of application scenarios, thereby proposing its three layers network architecture. Secondly, based on the variation mechanism of DC voltage, an index frame is established to evaluate the power quality of a DDS, providing an assessment method for a DDS. Finally, the key technologies for improving each index of the DDS are explored and prospected in this paper, hopefully enriching the DDS in terms of theoretical research development and application.