Disclosed are a high capacity wind turbine generator and a method for controlling the high capacity wind turbine. A generator for supplying electric power by converting kinetic energy of a blade rotating by wind into electrical energy; A first converter converting an alternating current (AC) voltage, which is electric power input through the generator, into a direct current (DC) voltage and outputting the converted voltage; A DC link connected to the first converter to supply the DC voltage; A battery controller connected to the DC link and configured to discharge or charge the charged DC voltage as electrical energy to a battery provided with the DC voltage of the DC link according to power output to a power system; And a second side connected to the DC link and the other side connected to the battery controller to convert the DC voltage supplied from at least one of the DC link and the battery controller to the AC voltage and supply the DC voltage to the power system. Provided is a high capacity wind turbine comprising a converter.
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