Performance evaluation of a DG voltage controller for smart grids

In a previous paper a DG reactive power control scheme aimed at improving the voltage profile in a smart grid has been proposed. In this paper the control scheme is recalled and validated by detailed numerical simulations. In particular, the performance is tested in presence of uncertainties of the load variations, interactions of the proposed control scheme with the control system in the primary substation and large random variability of the DG primary source. The analysis of the results and a comparison with classical DG reactive power regulation give evidence of the obtained improvements of the voltage profile.