WIND TURBINE GENERATOR, METHOD, AND PROGRAM THEREOF

摘要

A rotor having a plurality of wind turbine blades, a generator to be driven by rotation of the rotor, a pitch angle controller for controlling a pitch angle of the wind turbine blades according to a speed of a generator, and a comparing and selecting section are provided. When the voltage of the utility grid is a predetermined value or less, the pitch angle controller controls the pitch angle so that the wind turbine blades do not move to a fine side. Further, the comparing and selecting section compares a temporary pitch angle command value determined based on the speed of the generator with a previous value of a pitch angle command value, and when the temporary pitch angle command value is a command for controlling the wind turbine blades closer to the fine side than the previous value, outputs the previous value as a current pitch angle command value.

主权项

1. A wind turbine generator, comprising:
a rotor having a plurality of wind turbine blades; a generator to be driven by rotation of the rotor; and a pitch angle control part for controlling a pitch angle of the wind turbine blades according to a speed of the generator, wherein when a voltage of a utility grid is a predetermined value or less, the pitch angle control part controls the wind turbine blades based on a pitch angle command value for making the wind turbine blades unmovable to a fine side, and the pitch angle control part comprises a comparing and selecting means for, when the voltage of the utility grid is the predetermined value or less, comparing a temporary pitch angle command value as a command value of a temporary pitch angle determined based on the speed of the generator with a previous value as the previous pitch angle command value; and when the temporary pitch angle command value is a command for controlling the wind turbine blades closer to the fine side than the previous value, outputting the previous value as the current pitch angle command value.