RT info:eu-repo/semantics/article T1 Method to Model the Hourly Variability of Renewable Energy Sources in Integrated Assessment Models A1 Parrado-Hernando, Gonzalo A1 Frechoso Escudero, Fernando A1 Miguel González, Luis Javier K1 Integrated assessment model (IAM) K1 energy transition K1 policy K1 power system K1 Vensim K1 PNIEC K1 NECP K1 3306 Ingeniería y Tecnología Eléctricas K1 3322 Tecnología Energética AB A decarbonized economy implies deep structural changes across industries, including the power system, whose operation needs to balance supply and demand instantaneously. The energy planning community usually work with hourly-resolution tools, while the integrated assessment community do so with the year as the time unit. This article describes a model that integrates both time frames to consider limitations and competition among suppliers of electricity in long-term scenarios, with Spain as the case of study. The calibration was carried out over four historical years (2017-2020, including the impact of Covid) to show both the sensitivity of different meteorological conditions and differences in the ranking of priorities to supply power. The results show values below Spain’s objective of 74% presence of renewables in the electricity mix in 2030; while this objective is reached by our own proposal. PB International Centre for Sustainable Development of Energy, Water and Environment Systems SDEWES SN 18489257 YR 2024 FD 2024 LK https://uvadoc.uva.es/handle/10324/75756 UL https://uvadoc.uva.es/handle/10324/75756 LA eng NO Journal of Sustainable Development of Energy, Water and Environment Systems, Marzo 2024, vol.12, n.1, p. 1-25 NO Producción Científica DS UVaDOC RD 18-may-2025