BEHAVIOURAL ANALYSIS OF MICROGRID: A SUBSET OF SMART GRID

Dharshini G, Ramya J Rao, Sangeeta Modi

Abstract: Microgrid is a integration of distributed energy resources which can be tied to the utility grid through power electronic interface. The proposed system can be employed for rural electrification. In this paper active (P) and reactive (Q) power control is implemented for AC microgrid system in grid- connected mode. The power electronic interface used in the sytem is the multilevel inverter. The sources are coupled through three level inverter and connected to the utility grid. The selected microgrid configuration includes a 24kW of photovoltaic cell module, 20kW of PMSG based wind turbine module, fuel cell stack of 9.6kW. The PQ control strategy is applied to the three level inverter to maintain the system voltage and frequency. A phase locked loop is employed in the control strategy to synchronize utility grid and the microsources. The decoupled current (Id & Iq) is used to control active and reactive power through PQ control algorithm and it is applied to inverter. Active and reactive power is controlled using Id and Iq respectively. The control strategy is simulated in MATLAB/Simulink.

Keywords: Microgrid, Distributed Energy Sources, Control of Microgrid, Grid-Connected Mode, Inverter Control

DOI: https://doi.org/10.15623/ijret.2016.0516041