Akademik Veri Yönetim Sistemi
Electrical Engineering, cilt.108, sa.2, 2026 (SCI-Expanded, Scopus)
Although there are currently no grid-connected BESS projects in commercial operation in Türkiye, tenders are ongoing, and several projects are under construction. This study evaluates the economic feasibility of wind-battery hybrid energy systems in the Turkish electricity market and compares multiple investment strategies, recognizing that, while Türkiye has a regulatory framework such as the “Regulation on Acceptance of Electricity Generation and Electricity Storage Facilities,” detailed mechanisms like the Service Performance Measure (SPM) or area-based active power formulas for dead band operation are not yet fully developed. A case study based on a 30-megawatt wind power plant and a 30-megawatt-hour lithium-ion battery storage system located in Istanbul is analyzed across four distinct scenarios: (1) participation in the day-ahead market (DAM) only, (2) battery dispatch based on state of charge, (3) battery operation controlled by market price signals, and (4) combined participation in both the DAM and the ancillary services market. For each scenario, annual energy production, revenue projections, capital expenditures (CAPEX), operational expenditures (OPEX), net present value (NPV), internal rate of return (IRR), and payback period (PP) were calculated. Results show that the standalone wind power plant achieves a payback period of 6 years and an internal rate of return of 17.62%. When the battery system is integrated without ancillary services participation, the payback period extends to 8 years. However, with ancillary services revenues included, the payback period is again reduced to 6 years, and the internal rate of return is 17.8%. These findings highlight that for BESS investments to be economically viable in Türkiye, revenue must be derived from participation in ancillary services markets.