Introducing a tool to evaluate variable renewable energy droughts

Variable renewable energy sources (VRE) are pivotal for decarbonizing energy systems. With increasing VRE deployment, variability issues driven by extreme weather events become more pronounced. Long-lasting periods of very limited VRE availability (‘VRE droughts’) add pressure to renewable energy systems, especially in times of peak demand. Given the dependence on weather conditions, VRE droughts are not limited to a specific region but vary largely across space and time. In this talk, I will discuss distinct definitions of VRE droughts and introduce a novel tool for systematic evaluation. Based on preliminary results of a European and Australian case study, I will discuss key indicators, e.g., duration, frequency, and cross-regional correlation. Insights illustrate the crucial and challenging aspects of resilient renewable energy systems and their role in robust energy systems modeling and planning.