The inverters controlled by virtual synchronous generator(VSG)can provide inertia and damping for microgrids. A method for identifying the parameters of VSG is proposed to provide the basis for the optimal design of microgrids. Firstly

a second-order transfer function model of VSG's active power output to command power is proposed. Secondly

according to the active power response of VSG-controlled inverter to the command power

and the mathematical relationship between transfer function parameters and inertia and damping coefficients

the inertia and damping coefficients of the inverter are identified by using the recursive least squares algorithm. Meanwhile

the errors caused by steady state equilibrium shift and the bilinear transformation on the identification results are analyzed

which shows that the parameter identification of VSG by using the recursive least squares algorithm can satisfy a certain accuracy requirement. Finally

the feasibility and effectiveness of the proposed method are verified by simulations with MATLAB and experiments.