Abstract：Through the control of the machine side converter and the grid side converter of wind turbine,which can not only continuous operating,but also can help the grid voltage recovering. Realize the low voltage ride-through (LVRT) during symmetric grid fault. The control target of machine side converter is to realize the maximum wind energy tracking and control of reactive power .The control target of the grid side converter is to ensure the stability of DC bus voltage and control the reactive component of input current. The crowbar protection circuit is employed to ensure the rotor side current and DC bus voltage within the safe range. A speed loop is added based on the original double fed induction generator (DFIG) in this paper, which improve the dynamic performance of the speed and real-time power matching. The system anti impact ability is enhanced and the system stability is improved. The experimental results prove that the LVRT control method of DFIG is effective.
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