Technically it is possible to collect data sheets from the manufacturer websites and use tools like Enauge Digitizer or other software.
I think most modelling teams have a collection of “ripped” power curves 
Contacting the manufacturers is an option (following the EntsoE procedure).
UPDATE (in German):
https://www.juraforum.de/forum/t/technische-daten-beschreibungen-und-bilder.313565/
https://www.juraforum.de/forum/t/technische-datenblaetter-nutzen.412852/