Exploring backup requirements to complement wind, solar and hydro generation in a highly renewable Spanish power system

Planning the deployment of energy storage systems to integrate high shares of renewables: The Spain case study

“…8 shows how wind capacity more than doubles to achieve a 100% RES scenarios, wind overinvestment and curtailment results cost competitive due to the large costs of seasonal storage. Again, this remark correlates with other studies as the extra need of wind over solar for a fully decarbonised system [27], or the potential role that firm technologies might have on the system [4,20].…”

“…In Ref. [27], the authors study storage strategies in the Spanish power system. They conclude that higher wind energy is needed compared to Solar PV to achieve 100% RES power system as wind production accommodates better and requires less storage.…”