Designing of Microgrid With Different Renewable Energy Sources

Abstract

The microgrid is cluster of loads and micro sources that work together to produce heat and power to a limited region as single controlled system. Both an AC and a DC grid make into a hybrid grid. This research presents a microgrid system containing different renewable energy sources along with its control techniques, as well as the analytical results. This renewable energy resource (RES) has a20-kilowatt wind turbine (WT) with a permanent magnet synchronous generator (PMSG), a 50-kilowatt Fuel cell stack and 25-kilowatt solar array. The WT, PMSG, unregulated rectifier, and dc-dc boost converter are all part of a wind energy plant. IC(Incremental Conductance) type MPPT is used to provide the switching signal for the boost converter connected to Solar PV power plant. PI controllers are used to control the boost converters in both the wind power plant and Fuel Cell(FC) systems. MOSFETs are the switching element in all boost converters. A 1000V DC-bus bar is used to connect the hybrid microgrid. To convert from DC to AC, a full bridge inverter circuit is utilized as the topology, with an IGBT as the switching element. The phase locked loop (PLL) method is employed to keep the AC voltage produced at the inverter's output synchronized with the grid in terms of phase, frequency, and amplitude. The system has been used in a variety of environments, including variable wind speed and solar irradiation And, regardless these constraints, the system has provided the expected result.