An Efficient Control of DC Microgrid with Variable Generation and Energy Storage System in Standalone or Grid Integrated Mode

This paper represents a hybrid system implant of Solar (PV) Energy storage device (Battery) and Supercapacitor (SC) and fuel cell to obtain isolated DC load demand. The solar (PV) is the preliminary energy source, where battery and Supercapacitor both are considered for their discrete power density to supply transient and static load consecutively. All source are joined to DC link bus by different DC-DC converters. A power flow control scheme modify theirfluctuate DC voltage to bus voltage by means of these converters. In this work, SC is taken to work for a limited period where fluctuation in load demand. Battery and FC are used for energy storage purposes. Battery is eligible to supply long term energy demand and Fuel cell used for backup source of energy which is used absence of solar energy and battery. Fuel cell charged the battery if it goes his minimum soc. SC is essential to meet temporary load demand. After that fault analysis will take place at different point of micro grid. The flawless energy management concept has been validated in MATLAB/SIMULINK with irregular load demand and solar radiation profile.