Solar-Wind and Battery Supported Grid Interfaced Microgrid with Seamless Grid/DG Set Synchronization

This paper deals with the battery-supported grid interfaced microgrid with solar PV (Photovoltaic) array and wind-based generation unit. This microgrid is operated successfully in three modes i.e. 1) grid connected (GC) mode, 2) islanded (IS) mode, and 3) DG set (Diesel Generator) connected mode. The reason behind the three modes of microgrid function is to feed the local loads without interruption of the power. The control strategy seamlessly switches the operating modes and maintains the grid/DG set voltage and current power quality. Furthermore, the control strategy of the microgrid provides a constant power injection mode during sudden variation of solar and wind powers for improving the grid stability. Moreover, this microgrid exhibits the performance during modes of transition, unbalanced load condition, solar power and wind power variation.