The basis for the time series of normalized generation for wind turbines is the COSMO-EU weather model from the DWD. The wind profiles are established by power curves of the chosen wind turbine types per NUTS-3-region, which can be identified in the internal_id field.
Time Series of Wind Onshore (Europe NUTS-3): https://opendata.ffe.de/dataset/time-series-of-wind-onshore/; München: Forschungsstelle für Energiewirtschaft e. V. (FfE), 2019.