I have modeled a dfig in a pu system with these mechanical parameters:

nertia constant H=5.04 s,friction factor F=0.01pu

I dont know how can I design a PI controller for the speed in a pu system; the system is

wr= 1/(2H.s+F)*(Te-Tm)

where wr: mechanical speed

Te electromagnetic torque

Tm mechanical torque applied to the machine