Impact load monitoring system and impact load monitoring method for wind turbine for wind power generation
AssigneeMitsubishi Heavy Industries, Ltd.
InventorKatsuhiko Shoda
Life of this patent
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Abstract
An impact load monitoring system for a wind turbine for wind power generation is provided with: an acceleration sensor 28 attached to a step-up gear 18 connected to a main shaft 20; a frequency filter 30 for extracting a monitoring-object component contained in a target frequency domain from vibration data representing a temporal change of amplitude of the acceleration obtained by the acceleration sensor 28; and a determination unit 32 for determining whether or not amplitude of acceleration of the monitoring-object component exceeds a reference value which is set in advance, by comparing the amplitude of the acceleration with the reference value.
Claims18
An impact load monitoring system for a wind turbine for wind power generation, comprising:
- an acceleration sensor attached to a peripheral device around a main shaft of the wind turbine;
- a frequency filter electrically connected to the acceleration sensor, and extracting a monitoring-object component contained in a target frequency domain from vibration data obtained from the acceleration sensor, the vibration data representing a temporal change of amplitude of acceleration obtained by the acceleration sensor;
- and
- a determination unit electrically connected to the frequency filter, and determining whether or not the amplitude of the acceleration of the monitoring-object component exceeds a reference value which is set in advance, by comparing the amplitude of the acceleration with the reference value.
An impact load monitoring method for a wind turbine for wind power generation, the method comprising steps of:
- attaching an acceleration sensor to a peripheral mechanism around a main shaft of the wind turbine;
- extracting a monitoring-object component contained in a target frequency domain from vibration data obtained from the acceleration sensor, the vibration data representing a temporal change of amplitude of acceleration obtained by the acceleration sensor;
- and
- determining whether or not the amplitude of the acceleration of the monitoring-object component exceeds a reference value which is set in advance, by comparing the amplitude of the acceleration with the reference value.
An impact load monitoring system for a wind turbine for wind power generation, comprising:
- an acceleration sensor attached to a peripheral device around a main shaft of the wind turbine;
- a frequency filter electrically connected to the acceleration sensor, and extracting a monitoring-object component contained in a target frequency domain from vibration data obtained from the acceleration sensor, the vibration data representing a temporal change of amplitude of acceleration obtained by the acceleration sensor;
- and
- a determination unit electrically connected to the frequency filter and determining whether or not the amplitude of the acceleration of the monitoring-object component exceeds a reference value which is set so as to detect an impact load applied on the main shaft due to wind shear, by comparing the amplitude of the acceleration with the reference value.
Dependencies are inferred from the claim text.