Abstract: With the rapid development of the distributed generation technology and microgrid technology， more and more power electronic devices are used in modern power system especially in microgrids. Meanwhile， power electronic converters in microgrid may affect the stability of the system due to lack of necessary inertia and damping. To deal with the problem， this paper， by simulating the traditional synchronous machine rotor equation， equips the droop control with virtual inertia and damping to set up a virtual synchronous generator control model for inverter control. Next， the influence of inertia and damping parameters on the control stability of the virtual synchronous generator is studied. By designing reasonable trigger mechanism， the virtual synchronous generator control strategy with adaptive parameters is put forward， which can flexibly switch adaptive parameter adjustment mode according to control requirements. At last， simulation result and comparative analysis show that the proposed strategy is beneficial to enhance the frequency and power stability of the system to a certain extent.

Key words: microgrid, inverter, virtual synchronous generator, adaptive parameters, stability control