Control and Protection of Multiple-terminal Flexible DC Distribution Network Based on MMC
For improving stable operation ability of multi terminal flexible direct distribution network system,the divided urban medium voltage distribution network is interconnected firstly in this paper,the multi terminal flexible DC hybrid distribution network is designed,and the selection of main converter equipment is designed;Based on the droop control strategy and combined with the curve characteristics of power reference value translation,the DC voltage slope control method considering voltage limit is applied to multi terminal flexible direct distribution network,and the converter protection configuration strategy of design case is formulated. The application case of 10 kV multi terminal flexible direct distribution network is set up in PSCAD/EMTDC. Finally,the effectiveness of DC voltage slope control strategy and protection configuration scheme is verified by simulation.
DC distribution networkMMCvoltage droop controlprotection configuration
万方数据
维普
