An object is to provide a wind turbine generator that is capable of continuously operating an auxiliary unit even when a grid fault occurs. Provided is a wind turbine generator including an auxiliary-unit breaker 40 provided in a power line that connects an auxiliary unit 25 to a power grid 13, wherein the auxiliary-unit breaker 40 has a current-resisting capacity within a range that tolerates a current that flows in a low-voltage event and does not exceed a tolerable current of a motor provided in the auxiliary unit 25. Figure 2
