Adaptive Control of Microgrid Security

The low inertia of inverter-based distributed energy resources (IBDERs) can threaten the dynamic security of microgrids (μGs) and make μGs more susceptible to incipient fault transients. This letter proposes a control approach to improve the transient response of IBDER and maintain a reasonable dynamic security margin for μGs. The IBDER is controlled to mimic the inertial response and voltage support characteristic of synchronous generators subjected to severe disturbances. The proposed method adapts to various μG conditions and maintains the coherency of IBDER with synchronous generator-based distributed energy resources.