Low voltage ride-through system and method of double-fed asynchronous wind generating unit based on dynamic voltage restorer (DVR)

A low voltage ride-through system of a double-fed asynchronous wind generating unit based on a dynamic voltage restorer (DVR) is characterized by comprising the double-fed asynchronous wind generating unit and the DVR. The low voltage ride-through system has the advantages that low voltage ride-through capacity of a DFIG unit is improved, and fluctuation of stator voltages can be also reduced and even eliminated through the DVR and an injection transformer.