At 3:00 AM on July 10, 2015, wind turbines in Denmark generated a record setting 140% of national electricity demand.
Approximate Annual Wind Energy Production in Select Countries
Wind power is a significant part of the overall electricity supply in Denmark. The variable nature of wind can cause wide swings in production. At high penetrations, this can have a meaningful impact on the overall supply/demand balance. Robust grid infrastructure and dynamic energy market are required to accommodate high penetrations of variable renewable resources. Otherwise, grid operators must curtail renewable resources to maintain a balance between electric generation and load demand.
European Wind Energy Association: Wind in Power – 2014 European Statistics
American Wind Energy Association: Wind Energy Keeps Breaking Records – In Denmark and Here at Home
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