Adaptive Inertia Control of Virtual Synchronous Generator Based on Power Feedback

In traditional power electronic power generation devices, there is no rotor inertia like a synchronous machine. Load changes will cause sudden changes in the frequency of the microgrid system, which can easily trigger the protection device of the system and have a negative impact on the stable operation of the microgrid system. At the same time, if there is a large inertia in control loop, it will reduce the response speed of the system and easily cause oscillation. In this article, an adaptive inertia control technology based on power feedback is proposed. By adding power feedback control in the inertia link, the rate of change of frequency can be suppressed and the transient response of the system can be improved at the same time. Finally, the effectiveness of the proposed method is validated by the simulation results.