This paper reviews advanced control techniques for microgrids, focusing on decentralized, distributed, and hierarchical control. It begins by discussing decentralized control methods, including droop control and its modifications to address nonlinear loads and resistive line impedances. The paper then examines stability analysis of decentralized controlled microgrids, highlighting the importance of droop gains and the use of virtual impedance loops. The hierarchical control architecture for microgrids is also reviewed, detailing three control levels: primary control for inner DG unit management, secondary control for frequency and amplitude restoration, and tertiary control for power flow regulation at the point of common coupling (PCC). The paper concludes by discussing future trends in microgrid control, emphasizing the role of energy management systems and multi-agent coordination in microgrid clusters.This paper reviews advanced control techniques for microgrids, focusing on decentralized, distributed, and hierarchical control. It begins by discussing decentralized control methods, including droop control and its modifications to address nonlinear loads and resistive line impedances. The paper then examines stability analysis of decentralized controlled microgrids, highlighting the importance of droop gains and the use of virtual impedance loops. The hierarchical control architecture for microgrids is also reviewed, detailing three control levels: primary control for inner DG unit management, secondary control for frequency and amplitude restoration, and tertiary control for power flow regulation at the point of common coupling (PCC). The paper concludes by discussing future trends in microgrid control, emphasizing the role of energy management systems and multi-agent coordination in microgrid clusters.