A. Appendix

In this part, simulations are investigated with a 1.5 MW generator connected to a 690 V/50 Hz grid [15].

The generator's parameters are presented below:

Three pole pairs, = 0.012 Ω, = 0.021 Ω, = 0.0135 H, = +2.00372 e4 H, = +1.7507 e4 H,

Turbine's parameters: three blades, diameter = 70.5 m, gearbox ratio = 90: inertia (turbine + DFIG) = 1000 kg m2 and viscous coefficient (turbine + DFIG) = 0.0024 kg m/s.
