wherewR,qR are the angular velocity and position of the turbine rotor
wG,qG are the angular velocity and position of the generator rotor
TW is the rotor aerodynamic torque
TG is the generator electromagnetic torque
HR,HG are the rotor and generator inertias
C,d are the stiffness and damping coefficients of the elastic coupling
DR,DG are the external damping coefficients of the rotating inertias