The virtual synchronous generators (VSG) has the similar power oscillation characteristics as those of the traditional synchronous generators. The frequency deviation feedforward-based damping method is simple to be implemented and can

in case of active power reference or grid frequency step

suppress the active power oscillation of VSG without affecting the original inertia characteristics of VSG at the same time. However

in the existing study the influence of the low-pass filtering is not considered when the closed-loop transfer function model of the active power loop of frequency deviation feedforward-based damping method is set up

and the system order changes from the third order to the second order. If the existing parameter tuning method is still used

it may lead to the feedforward coefficient design incorrect. To this end

the transfer function model of VSG considering the effect of low-pass filtering is set up in this paper

and the reasons that the damping ratio of VSG cannot be freely adjusted between 0 and 1 are identified based on the pole-zero maps. Meanwhile

the method of selecting feedforward coefficient according to the desired damping ratio and natural oscillation frequency is given

which simplifies the parameter design process. The correctness of the parameter design method is verified by simulation results.