This dissertation focuses on designing and developing single-phase inverter (SPIs)control typologies for different microgrid (MG) frameworks. SPIs are considered a major part of the distributed energy resources (DERs), especially at the power distribution level laterals. Thus, effective and collective management of SPIs at normal grid operating conditions and under disturbances is a critical factor for reliable and efficient operation of grid integrated DERs with SPIs. The major contribution of this dissertation is that, first, a local control architecture is designed that works for Stand-Alone (SA) and Grid-Connected (GC) modes of operation of SPI and does not require switching between control modes. The architecture also provides a seamless transfer of the SPIs from GC to SA without compromising the grid quality and confirming to interconnect on standards. Second, a control architecture for multiple inverters connected to the same phase that can share the loads is designed. This is extended to multiple inverters connected to each phase in one lateral during normal operation and under unbalance conditions. Third, an architecture that can be used for grid support function with SPIs connected at different parts of the power distribution network is designed. For this, an adaptive droop-based architecture is explored that identifies the system’s impedance matrix and can be applied for varying network topology. The approach is based on the alternate direction method of multipliers (ADMM) for identifying the grid impedance as a multiple input-multiple output (MIMO) trans. Finally, a coordinated framework is proposed for using SPIs along with legacy grid controllers to support the power distribution system. Overall the results show that the proposed control architectures perform better than the state-of-the-art and also provides grid functions that allow high penetration of SPIs in the power grid.