Smart grid realization with introducing unified power quality conditioner integrated with DC microgrid

This paper presents a new design of the hybrid AC/DC microgrid for optimization of the performance of the smart grid. This design by using the capacity of the DC microgrid and introducing a new unified power quality conditioner, named UPQC-DC, and providing appropriate control schemes for two back to back interface converter between the AC and DC microgrids, presents important characteristics such as power quality improvement, power flow control, reactive power compensation, and elimination of power swings. The proposed method guarantees the realization of all aforementioned goals in both grid connected and isolated modes for the first time. Several computer simulations are performed using Matlab/Simulink software for verifying the proposed scheme.