ABSTRACT Virtual synchronous generators (VSGs) based inverters have been widely applied for active frequency and voltage support. However, when the grid encounters unexpected large disturbances, like voltage drops, the power electronic components of the inverters are prone to suffer from overcurrent, resulting in the inverter being disconnected from the grid, and threatening the stability of the power system. To enhance the fault ride‐through (FRT) capability for the VSGs, an FRT control method based on dynamic power compensation (DPC) is proposed in this article, which comprehensively considers both the fault current limitation and power angle stability for the VSG. The special phenomenon of injecting reactive power into the grid during faults, resulting in the VSG absorbing active power after voltage recovery, is thoroughly analysed. Then, an improved control strategy is proposed that coordinates the regulation of the VSG's active and reactive current references, effectively avoiding active power backflow. Finally, the feasibility of the proposed method is verified through simulation and experiment.
Li et al. (Wed,) studied this question.