Robust Control and Harmonics Modeling of a PMSG for a 1.5 MW Wind Turbine

Classic assumptions and hypotheses, such as first harmonic, are widely adopted in literature in the modeling of Permanent Magnet Synchronous Generators (PMSG) for wind energy applications. This allows smoother and less bulky simulations and gives sufficient results. However, models that reflect both the electromagnetic and aerodynamic behaviors are needed to conduct further studies on the aerogenerators. In this paper, a near-realistic simulation environment of a 1.5 MW PMSG-based and grid-connected wind conversion system is proposed. The computer-aided engineering tool FAST is used. It allows introducing the aerodynamic behavior of the wind turbine and the loads that come alongside it in the simulations. Both a harmonic and a first harmonic model of the PMSG are controlled. An optimized field-oriented control strategy (F.C) is proposed using the H
_∞
robust control approach. The optimized F.C strategy is proven more efficient than the classic PI-based F.C and an adequate control is obtained.