Abstract：In order to eliminate the problem of low inertia and large frequency fluctuation in wind power gridconnected system when power disturbance occurs，an improved virtual inertia control strategy was proposed. A

cooperative control strategy of adaptive moment of inertia and damping coefficient was introduced in the main

control system of wind power inverter. The energy storage static synchronous compensator（STATCOM/BESS）

was used to provide the active power and reactive power required by the system. At the same time，the power

output of STATCOM/BESS was adjusted according to the frequency deviation and change rate of the system. By

analyzing the small signal model of virtual synchronous generator（VSG）of the fan，the setting rules of the

adaptive VSG moment of inertia and damping coefficient were determined. The Matlab/Simulink simulation results

show that the strategy has a more obvious effect on frequency fluctuation，and can effectively suppress the voltage

drop of the fan junction point，and improve the ability of safe and stable operation of the system.

      Key words：damping coefficient；virtual synchronous generator（VSG）；frequency suppression；moment of

inertia；STATCOM/BESS