According to two typical droop control strategies of Udc-P and Udc-Idc used in flexible DC distribution system

a small signal stability analysis model of droop control is established to investigate the stability of the system based on the change of influence factors such as DC line parameters

the intensity of interconnected AC power grid

and the DC load. Then the feedforward compensation droop control method on the basis of band-pass filter is put forward

and an analysis on the comparison of system stability before and after compensation is taken. Finally

a time-domain simulation test through modified IEEE 33-node test system is made. The results show that the proposed method is an effective way to increase damping and improve the stability of the system.