Wind power generation device

A wind power generation device comprising:

• a blade;
• a main shaft of which one end is connected to the blade;
• a speed increaser connected to the other end of the main shaft;
• an output shaft of which one end is connected to the speed increaser;
• a power generation unit connected to the other end of the output shaft;
• a first vibration sensor attached to the power generation unit and configured to acquire first vibration data related to the power generation unit;
• a second vibration sensor attached to the speed increaser and configured to acquire second vibration data related to the speed increaser;
• a first clutch arranged on the output shaft;
• a second clutch arranged on the main shaft;
• and
• an abnormality diagnosis unit, wherein:
• the power generation unit is configured to rotate the output shaft and the main shaft by performing at least a first powering operation and a second powering operation;
• and
• the abnormality diagnosis unit is configured to diagnose presence or absence of an abnormality of the speed increaser based on the second vibration data acquired by the second vibration sensor during a period in which the power generation unit performs the first and second powering operations, wherein the abnormality diagnosis unit is configured to transmit command signals to cause operations including:
• the first clutch is connected, and the second clutch is disconnected,
• during the first powering operation the output shaft is rotated at a first rotational speed by the power generation unit and the main shaft is rotated at a third rotational speed by the speed increaser,
• during the second powering operation the output shaft is rotated at a second rotational speed by the power generation unit and the main shaft is rotated at a fourth rotational speed by the speed increaser,
• a power spectrum of a fast fourier transform (FFT) with respect to the power generation unit is generated using the first vibration data at the first rotational speed of the output shaft and the second rotational speed of the output shaft,
• a power spectrum of a fast fourier transform (FFT) with respect to the speed increaser is generated using the second vibration data at the third rotational speed of the main shaft and the fourth rotational speed of the main shaft, and
• a noise vibration component generated from the power generation unit is removed by subtracting the power spectrum of the FFT with respect to the power generation unit from the power spectrum of the FFT with respect to the speed increaser.