The fact that microgrids integrate numerous decentralized generation units that are electronically connected and interfaced using inverters in grid-connected or islander mode, control complexity increases and brings with it additional challenges, particularly during the transient phase when system stability, voltage, and frequency regulation must be ensured, as well as power flow sharing. As a result, a reliable control structure combining all these features is an active area of research. However, an in-depth examination of hierarchical control methods for various microgrid topologies is rarely addressed. This study fills this gap by providing an overview of microgrid architectures and hierarchical control methods, focusing on two control strategies, namely droop control and virtual impedance strategies, which are implemented in parallel-connected inverters for efficient power-sharing.