Ceylan, OğuzhanAhmedi, BahmanCeylan, OğuzhanÖzdemir, Aydoğan2020-12-172020-12-1720208978-172811078-3https://hdl.handle.net/20.500.12469/3563https://doi.org/10.1109/UPEC49904.2020.9209880Optimal sizing and siting of distributed generation (DG) units play an important role for improving voltage profile and reducing power losses. Moreover, battery energy storage system (BESS) units may help peak shaving. This paper presents a two stage approach, first of which aims optimal DG unit allocation, and second aims to determine optimal location and operation of BESS units. The problem formulation adopted due to the regulations in Turkey that supports DG units (Photovoltaics-PVs and Wind Turbines-WTs) with maximum unit size of 1 MW. A recently developed heuristic optimization method named as Harris hawks optimization (HHO) algorithm is used for obtaining near optimal solutions. We tested the developed model by using 33 and 141 bus distribution test systems.eninfo:eu-repo/semantics/closedAccessbattery energy storage system (BESS)distributed generation (DG)distribution networks (DNs)harris hawks optimization (HHO)optimizationConference ObjectWOS:00062777100012010.1109/UPEC49904.2020.92098802-s2.0-85095607047N/AN/A