Sezai PolatEmrah BiyikHacer Sekerci OzturaŞekerci Öztura, HacerOztura, Hacer SekerciPolat, SezaiBiyik, Emrah2025-10-0620250378-77961873-204610.1016/j.epsr.2025.1116292-s2.0-105000486632http://dx.doi.org/10.1016/j.epsr.2025.111629https://gcris.yasar.edu.tr/handle/123456789/6861https://doi.org/10.1016/j.epsr.2025.111629The intermittent nature of renewable energy complicates grid integration requiring an efficient Energy Management System (EMS). This study addresses day-ahead EMS in distribution systems (DS) with a focus on active and reactive power scheduling utilizing the reactive power support of inverters in Photovoltaic (PV) and Battery Energy Storage Systems (BESS). A novel current-based method is proposed accounting for current limits bus voltage inverter lifetime reduction costs and inverter losses modeled as load. This method impacts load flow bus voltage and voltage-dependent loads enabling optimal decisions for compensating inverter losses via the grid BESS or PV. Simulations on the IEEE 33 test system show a 5% reduction in inverter losses with the currentbased method and 6% with the traditional power-based method. Inverter lifetime reduction costs were minimized by 42% and 58% with the current- and power-based methods respectively under summer conditions. In winter reductions reached 49% and 14%. Crucially inverter output depends on bus voltage challenging the assumption of constant rated power. At voltages below 1.00 p.u. inverters underperform achieving only 209 kVA of a 215 kVA rating. These findings emphasize the need for accurate modeling to improve EMS performance and reliability in renewable energy systems.Englishinfo:eu-repo/semantics/closedAccessBattery Storage, Energy Management System, Inverter, Optimization, Photovoltaic, Reactive PowerDISTRIBUTION NETWORK, ENERGY-STORAGEEnergy Management SystemInverterBattery StorageOptimizationReactive PowerPhotovoltaicArticle