I have two questions.
1>My model is 3MW direct drive model. I have finished the linear file (.lin)about above rated wind by set the trimcase=3, I want to use the lin file to adjust the pitch control parameter(Kp and Ki), So I get the SISO simulink model by the.lin file .But I found that the Kp is very samll(Kp=0.16) when system stable. So I use the same GH bladed model to linear,I use the output (.mat from the bladed) to adjust the Kp=1.2 , it is normal .Is the FAST ss(A B C D) matrix different from the GH model ? The SISO is subtract form the A B C D,I think the SS matrix have some difference between the FAST and GH model.
2>In the IEC61400-1ed3, it said that the extreme load is the mean (6 seeds)or half mean (12seeds)in different turbulence wind seeds. Could the Mextreme or MCurnch calculate the cases?
Hope your guide