Key Laboratory of the Ministry of Education on Smart Power Grids (Tianjin University), Tianjin 300072, China
This work is supported by National Key R&D Program of China (No. 2018YFB0904600) and National Natural Science Foundation of China (No. 51677125).
The isolation and recovery of faults is the key issue to guarantee the supply reliability in the DC distribution network. Using converters with fault clearance capability and isolating switches to achieve fault current blocking and isolation has become an important development direction of DC distribution network. From the three aspects of protection technology and fault location, fault isolation and fault recovery, this paper summarizes the research status of fault processing technology based on blocking converters in the DC distribution network. Then the problems and difficulties of fault processing technology based on blocking converters in the DC distribution network are sorted out. Finally, the development trend of key technologies in this research direction is prospected.