When I use FAST to built the WT model,I am confused about the Nacelle Mass in double-feed and direct-drive WT.
As we know,In Double-Feed WT,the generator is included in the Nacelle, but in Direct-Drive WT,the generator is not included in Nacelle. In the FAST,no matter what kind of turbine,the generator is always in the Nacelle , so the these nacelle parameters(NacCMxn, NacCMyn, NacCMzn, NacYIner, NacMass ) contains the generator. Is it right?
Hope your guide