An efficient crowbar to improve the low voltage ride-through capability of wind turbines based on DFIG excited by an indirect matrix converter
by Ahmad Khajeh; Reza Ghazi; Mohamad Hosseini Abardeh; Mahmoud Oukati Sadegh
International Journal of Power Electronics (IJPELEC), Vol. 11, No. 2, 2020

Abstract: Due to numerous advantages, in this work, the traditional back-to-back converter is substituted with an indirect matrix converter (IMC) to control the doubly-fed induction generator (DFIG). The recent grid codes require that the wind turbines must have the low voltage ride-through (LVRT) capability. One of the main challenges of the IMC that slows down the industrial applications is the fault currents handling. In this paper, a new low cost, simple and reliable method is proposed to protect the IMC from large fault currents. This method is based on a novel crowbar structure. The PSIM simulation results confirm the efficiency of the proposed method in satisfying the new LVRT standards. Also, experimental results of a laboratory prototype verify the effectiveness of the proposed method.

Online publication date: Fri, 14-Feb-2020

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