New Approaches to Reactive Power Sharing and Voltage Control in Islanded AC Microgrids

Advanced dynamic control strategies are presented to approach primary voltage control and reactive power sharing among Grid-Supporting inverters interfacing production units in AC islanded Microgrids (MG). After defining the MG structure and the power system model used in the analytical analysis, new methods are introduced and analyzed. Then, a setting procedure of control parameters is developed in order to meet the requirements of a correct power sharing, voltage stability and maintenance of acceptable voltage profile. Next, a comparison among the new approaches and the conventional droop results is performed, by means of dedicated simulations on a common benchmark network in order to show advantages of the new approaches.