A Study of Existing Microgrid System

The paper represents an overview of the microgrid architecture present in the existing power system. Depending on the availability of resources, geographical locations, load demand, and existing electrical transmission and distribution system, microgrids can be either connected to the grid or can work in an autonomous mode. Storage can also be a part of the microgrids architecture. To deploy the distributed generation properly the characteristics of various sources like photovoltaic (PV), wind turbine (WT) and load establishment should be done. The total cost for the implementation of the distributed generation system consisting of an investment cost of DG, maintenance cost, running cost, fuel cost and environment compensation cost is taken as objective function whereas node voltage and size of the storage unit is taken as a main constraints for the system. Microgrids with a variety of distributed generations (DGS) are very common in modern power system. When a fault occurs in the power system, the microgrid will operate as an isolated grid to ensure security. Then DGS were separated from the microgrid and the measures of load shedding were taken accordingly. When the fault is cleared, it is important to restore the whole network and as much load as it can. The future electricity network must be flexible, accessible, reliable, and economic according to the worldwide smartgrid initiative.