Mitsubishi Heavy Industries Limited

Mitsuyoshi Fukuda

Tohru Minami

Eiji Irie

Hideto Doi

A wind turbine generator system includes, in a nacelle mounted atop a tower, a main shaft that is coupled to a rotor head to which wind turbine blades are attached and that integrally rotates therewith, a gear box accelerating and outputting the rotation speed of the main shaft, a generator driven by the output of the gear box, and a controller that performs cut-out control during strong wind when a measured value from an anemometer is a predetermined level or more. The controller is configured to decide that the anemometer has a fault when a difference of a predetermined level or more occurs between the measured value from the anemometer and an estimated wind speed value obtained from a relationship between a blade-pitch-angle of the wind turbine blades and an output of the generator.

Wind turbine generator system including controller that performs cut-out control

The present invention provides a maintenance operation method for a wind turbine generator and a wind turbine generator, which can effectively utilize a phase advance capacitor equipped in the wind turbine generator and contribute to the phase factor improvement of the system side. A maintenance operation method for a wind turbine generator including an induction generatordriven by rotation of blades, a power output linefor outputting power of the induction generatorto a distribution system, and at least one phase advance capacitorparallel-connected to the power output line, comprises: a first step of releasing connection between the phase advanced capacitorand the power output linewhen a maintenance mode is selected; and a second step of returning the connection between the phase advanced capacitorand the power output lineby a manual operation or an automatic operation, wherein the phase advance capacitorreturned to the connection with the power output lineperforms a power factor improvement of reactor loadsin the distribution systemside through a linkage portionwith the distribution system

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Nagasaki, Japan

Mitsuyoshi Fukuda