Frequency and Voltage Control Techniques through Inverter-Interfaced Distributed Energy Resources in Microgrids: A Review

Microgrids (MG) are small-scale electric grids with local voltage control and power management systems to facilitate the high penetration grid integration of renewable energy resources (RES). The distributed generation units (DGs), including RESs, connected (micro) through electronics-based inverters. Therefore, new paradigms required for frequency regulation by inverter-interfaced DGs (IIDGs). Notably, employing effective methods establishing power-sharing among parallel inverters in MGs is most critical issue. This paper provides a comprehensive study, comparison, classification communication-based, decentralized, construction compensation techniques. development inverter-dominated has caused limitations classical techniques due their defective performance handling non-linear models IIDGs. To this end, article reviews illustrates advanced controllers that can deal challenges created uncertain arbitrary impedance characteristics IIDGs dynamics/transients.