Abstract
This paper presents a nonlinear feedback controller for a permanent-magnet synchronous generator (PMSG) wind turbine system based on port-controlled Hamiltonian system. For the simplification, this work focuses on the nonlinear control law of the grid side converter (GSC) that is directly connected to the grid and affected during network disturbances. The proposed controller is designed through the analysis of PMSG GSC model from the passivity viewpoint in order to regulate the reference of the DC voltage and track the reference of the reactive current. The exponential stability of the equilibrium point of the error dynamics at the origin is guaranteed by using Lyapunov theory. Finally, the proposed method is validated through simulation. The simulation results show that the performance has smaller overshoot and faster convergence when the proposed method is used than when the conventional method is used.
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