TY - JOUR N2 - In this paper, a control strategy for real-time operation of a master-slave controlled microgrid is developed. The basic idea of this control strategy is to schedule all dispatchable energy sources available into a microgrid to minimize its operational costs. Control actions are centrally evaluated by solving a two-stage optimization problem formulated to take place on two different time-scales: in the day-ahead and in the real-time. The first one provides a 24-hour plan in advance. It mainly draws up the active power levels that Distributed Energy Resources (DERs) should provide for each quarter hour of the next day by taking into account energy prices of the day-ahead energy market, the forecasted energy production of non-dispatchable renewables and loads. The real-time optimization problem updates the active power set-points of DERs in order to minimize as much as possible the real-time deviations between the actual power exchanged with the utility grid and its scheduled value. The effectiveness of the proposed methodology has been experimentally tested on an actual microgrid. L1 - http://www.journals.pan.pl/Content/117261/PDF/02_651-659_01507_Bpast.No.68-4_27.08.20.pdf L2 - http://www.journals.pan.pl/Content/117261 PY - 2020 IS - No. 4 (i.a. Special Section on Advances in Electrical Power Engineering) EP - 659 DO - 10.24425/bpasts.2020.134179 KW - microgrids KW - on-line economic dispatch KW - distributed energy sources KW - active distribution networks KW - microgrid planning A1 - Cagnano, A. A1 - De Tuglie, E. A1 - Marcone, F. A1 - Porro, G. A1 - Rasolomampionona, D.D. VL - 68 DA - 31.08.2020 T1 - Economic Dispatch for on-line operation of grid-connected microgrids SP - 651 UR - http://www.journals.pan.pl/dlibra/publication/edition/117261 T2 - Bulletin of the Polish Academy of Sciences Technical Sciences ER -