An evaluation of voltage variation and flicker severity in micro grid

This paper evaluates the effects of voltage fluctuation in a micro grid. The micro grid is modeled and simulated using the DIgSILENT software. The voltage flicker due to the variation of power productions from renewable sources in microgrid during off-grid and grid-connected mode are presented. The results indicate that the main sources of voltage fluctuation in the studied micro grid are PV and wind generations. The situation becomes worse when the microgrid is operated in off-grid mode. The renewable sources can improve voltage profiles in some cases.