POWER CONTROL AND HARMONIC ANALYSIS OF MICROGRID

Ramya J Rao, Dharshini G, Sangeeta Modi

Abstract: Microgrid is a solution to the problem of power crisis which makes use of abundantly available distributed energy resources. In microgrid system there is onsite generation of power and hence the transmission and distribution losses will be less. In this paper a inverter control strategy is proposed for the AC microgrid under grid-connected mode. For the control of active and reactive power of the microgrid, decoupling vector control sinusoidal pulse width modulation is applied to the inverter interfacing the microgrid with the utility grid. The power that is injected from the microgrid to the utility grid and power that is extracted from the utility grid due to increase in load demand was analyzed. The power profiles of microsources, utility grid and load was studied. FFT(Fast fourier transform) analysis of the grid voltage and grid current was carried out. The microgrid system of 50kW windturbine and 50kW photovoltaic system was implemented. To validate the results MATLAB/SIMULINK tool was used.

Keywords: Microgrid; power flow; active and reactive power; Grid-Connected; Decoupling Vector Control; Inverter control; DC grid

DOI: https://doi.org/10.15623/ijret.2016.0516082