Techno-Economic Evaluation of Energy Arbitrage Using Battery Energy Storage Systems at Strategic Nodes of the National Interconnected Electric System of Peru under the New Ancillary Services Framework Established by Law No. 32249

Muñoz W.L.R.; Cordova R.J.C.; Aquino D.R.G. · 2026 5th International Conference on Energy and Electrical Power Systems, ICEEPS 2026 (2026) · DOI: 10.1109/iceeps70377.2026.11662639

Resumen

This study assessed the techno-economic feasibility of Battery Energy Storage Systems for energy arbitrage at strategic nodes of the National Interconnected Electric System of Peru under the ancillary-services framework associated with Law No. 32249. Historical 15-min marginal-cost records from 90 nodes were analyzed for 2022-2025. A quantitative screening procedure combining marginal-cost variability, positive-spread persistence, low-price charging availability, and electrical representativeness identified 18 nodes for detailed evaluation. A 10 MW/40 MWh BESS was modeled to charge during the four lowest-cost hours and discharge during the four highest-cost hours, considering 90% round-trip efficiency, one equivalent full cycle per day, and 10%-90% state-of-charge limits. Zorritos 220 presented the strongest arbitrage performance, with an average efficiency-adjusted daily spread of 86.55 S/MWh, positive spreads on 81.72% of valid days, and annualized revenue of 0.973 million S/year. All valid days were retained, and mandatory cycling on negative-spread days reduced annual revenue by 1.42%-3.86% across the selected nodes. Nevertheless, arbitrage-only operation produced an NPV of -25.40 million S at Zorritos 220. Break-even operation requires approximately 2.983 million S/year from ancillary services, indicating that economic feasibility depends on sufficient complementary revenue or combined improvements in investment cost and market income.

Instituciones: Universidad Continental