Summarization of Power Electronics Techniques in Wind Power

Since the wind is non-storable energy source,the power electronics device is one of the key factors during the period of the wind transferred into the electric energy and transmitted to the power network.In this paper,the main wind generator systems existing and their controls are introduced.To the most potential variable-speed constant-frequency doubly fed induction generator,the device of power electronics converter used to control rotate speed is analyzed.The significance of installation of Static Var Compensator in AC connections to the grid is analyzed.The principle of high voltage direct current transmission light based on VSC is analyzed.Finally,it is described that the power electronics device will be applied widely in large-scale offshore wind farm in the future.