the probability of temporary faults in the future voltage source converter(VSC)based DC grid will increase
and effective reclosing strategies must be adopted for the system recovery. To reduce the adverse impacts of protection misoperation
insulation failure
and even damage to power electronic devices caused by the synchronous operation of the hybrid DC circuit breaker transfer branch
a novel reclosing strategy based on the step-by-step operation of transfer branch is proposed. The results show that the abrupt change of voltage is largely reduced during the step-by-step operation of transfer branch
and the potential negative impacts could be eliminated thoroughly. Finally
the validity and feasibility of the novel reclosing strategy are verified in a four-terminal annular VSC based DC grid electromagnetic transient model
and the applicability of the two reclosing strategies is analyzed.