Abstract: The reactive power support capability of grid side energy storage is expected to improve the voltage characteristic of multi-infeed high voltage direct current (MIDC). However, the interaction between power electronic equipment affects the control characteristic of MIDC. This paper analyzes the subsequent commutation failure (SCF) mechanism considering the interaction of grid side energy storage. It is found that, during the fault duration stage, the DC current value is greater when the constant current control is switched to the constant extinction angle control, and the reduction of current deviation control causes the decrease of the advance angle, which leads to the insufficient commutation supply area. During the fault clearing stage, the decrease of advance angle and large fluctuation may lead to insufficient commutation supply area. Also, if the MIDC power recovery process is underway when the reactive power instruction of grid side energy storage is set to zero, the SCF risk is aggravated. Thus, by improving the grid side energy storage and MIDC control strategy, the SCF prevention strategy of MIDC considering the interaction of grid side energy storage is proposed. Finally, the effectiveness of the proposed control strategy is verified under various fault types.