An equivalent electromagnetic model that enables post-fault recovery simulation of self-blocking modular multilevel converters(SB-MMC)is proposed. Firstly

the post-fault recovery controller and sequence are designed to re-start the system quickly after the clearance of DC fault. The dynamics of SB-MMC during recovery is analyzed. Based on the analysis

an equivalent electromagnetic model suitable for simulating all operating conditions is proposed. Finally

the correctness of the equivalent model is validated in PSCAD/EMTDC. The equivalent model can solve the time consuming and low efficiency problem well. And the effectiveness of the fast recovery strategy is also validated.