Modeling and control of direct-drive PMSG-based offshore wind turbine under rigorous wind conditions

The aim of this paper is to show the effectiveness of using a PMSG in offshore wind turbines to obtain reliable and efficient systems. A comprehensive detailed dynamic model and control strategy of a variable speed offshore wind turbine is described. The wind turbine is linked to the electrical grid by means of a back to back converter. The core of the converter is composed of two similar inverters linked via a DC-link bus. The PMSG side converter performs maximum power extraction from the wind by combining a Field-oriented control (FOC) strategy and a maximum power point tracker (MPPT) controller. While, the grid side converter ensures an efficient grid connection employing a voltage oriented control (VOC) strategy. Simulation results show the effectiveness of the proposed control under rigorous wind conditions.