DC commutation failure of the multi-infeed DC system is an important issue that threatens the security of power grid. In order to enhance the dynamic reactive power support capability of the system and reduce the probability of DC commutation failure

the SGCC will allocate a certain number of synchronous condensers in some DC converter stations of the whole network. In this paper

the impact of the commissioning of the synchronous condensers on the DC commutation failure characteristics is analyzed. In view of the shortcomings of the conventional control mode of the synchronous condensers in suppressing the continuous commutation failure of the DC

the effect of the synchronous condensers in the emergency control on the DC continuous commutation failure is analyzed. According to the characteristics of the continuous commutation failure and the control requirements

the emergency control system architecture for preventing DC continuous commutation failure is designed

and the realization method of the emergency control of the synchronous condensers is put forward. The effectiveness of the proposed control architecture and method is verified based on the real grid simulation.