Abstract: To reduce the risk of commutation failures (CFs) at the receiving end caused by AC faults at the sending end of the high voltage direct current (HVDC) transmission system, the influencing factors of such CFs are first analyzed, with a focus on studying the impact of the phase shift of the receiving end voltage on the switching margin and triggering deviation during faults. Considering the control mode of the inverter side during fault recovery, the impact of the sudden increase in DC on CFs is analyzed. Then, a complete suppression scheme, including multiple suppression strategies and parameter selection, is constructed based on the aforementioned influencing factors and mechanisms. This scheme predicts the phase shift of the commutation bus at the receiving end, determines the critical value of the trigger command based on the predicted amount, and corrects the trigger deviation caused by the phase shift to achieve dynamic adjustment of the inverter trigger command. At the same time, the current control strategy on the rectifier side is improved to address the sudden increase in DC caused by different response speeds of the control strategy during recovery, enabling the system to recover quickly and smoothly, further reducing the risk of CFs. Finally, simulation and comparison verification are conducted based on the CIGRE standard testing system, and the results show that the proposed suppression scheme can effectively suppress commutation failure caused by AC faults at the sending end.