Research on Start-stop Control of Flexible DC Distribution System

The fast start-stop of the flexible DC distribution system is the basis of ensuring the safe and reliable operation of the flexible DC distribution system. Therefore, the start-stop control of the flexible DC distribution system is studied in this paper. Firstly, the typical structure of the flexible DC distribution system is given. Then, the timing and logic of the access and exit of different power supply and load and start and stop of system are designed. Finally, the overall operation of modular multi-level converter, DC transformer and DC distribution system during start-up process is analyzed by simulation. The research results can be used for reference in theoretical research and engineering practice of the flexible DC distribution system..