Coordinated Utilization of Adaptive Inertia Control and Virtual Impedance Regulation for Transient Performance Increase of VSG Under Different Faults

For boosting the transient performance of a virtual synchronous generator (VSG) during different faults, this paper presents a methodology of collaboratively utilizing adaptive inertia control (AIC) and virtual impedance regulation (VIR). The VSG’s mathematical model is established, and its transient behaviors are probed. In the proposed coordination methodology, the function of the AIC is to flexibly change the rotor inertia in terms of the angular frequency variation, and the impact of the VIR is to timely and usefully eliminate the overcurrent risk. From these two benefits, the VSG’s power angle stability (PAS) enables to be kept, and the caused fault current rush can be powerfully mitigated to fulfill a low voltage ride through (LVRT) operation. To testify the feasibility and validity of the proposed coordination methodology, the VSG’s simulation model is built using MATLAB, and the VSG’s transient performance assessment is implemented by considering various faults. The findings show that the PAS margin is distinctly enhanced, and the LVRT problem of the VSG is well figured out. The simulation results favorably agree with the theoretical investigation.