RT info:eu-repo/semantics/article T1 Flexibility index and decreasing the costs in energy systems with high share of renewable energy A1 Pfeifer, Antun A1 Herc, Luka A1 Bjelic´, Ilija Batas A1 Duic´, Neven K1 Energías renovables K1 Energy transition K1 100% RES K1 Energy system modelling K1 Demand response K1 Decarbonization K1 2510.91 Recursos Renovables K1 3308 Ingeniería y Tecnología del Medio Ambiente AB Recent European Green Deal includes decision to become carbon neutral and even carbon negative region in order to tackle the climate crisis. Main technical challenge and a key factor in techno-economic analysis of the energy system of the future, based on variable renewable energy sources, is their variable production and its ntegration. In order to deal with this problem in long-term energy planning, different approaches have been tried, focusing on overcapacity, storage capacities and sectors coupling with heating and transport. In this research, different flexibility options, storage and demand response technologies are modelled on a national energy systems level. With the case study area modelled in EnergyPLAN model, the goal of the research is to show how each flexibility option influences the economically feasible generation capacities of renewable energy sources, storage technologies and demand response in order to reach a certain share of renewable energy in final energy consumed. To follow the numerous possible configurations of the system, flexibility index for each option and a flexibility vector for each scenario are introduced. Results show which flexibility options play key role in important steps of energy transition to 70%, 80%, 90% and 100% RES energy system. PB Elsevier SN 0196-8904 YR 2024 FD 2024 LK https://uvadoc.uva.es/handle/10324/67459 UL https://uvadoc.uva.es/handle/10324/67459 LA spa NO Energy Conversion and Management, Mayo 2021, n. 240 NO Producción Científica DS UVaDOC RD 23-jun-2024