Condition monitoring system and wind power generation system comprising the same
First Claim
1. A condition monitoring system configured to monitor a condition of equipment included in a wind turbine, the wind turbine including:
- a blade for converting wind power to rotation torque;
a main shaft receiving the rotation torque;
a power generator converting the rotation torque into electric power;
a nacelle provided on top of a tower and housing the main shaft and the power generator therein; and
a yaw bearing turnably supporting the nacelle on the top of the tower, the condition monitoring system comprising;
a first detector configured to detect the condition of the equipment;
a monitor device configured to generate a diagnosis parameter based on a detection result of the first detector;
a controller configured to diagnose a failure of the equipment based on the diagnosis parameter;
a second detector configured to detect a rotation speed of the nacelle; and
a third detector configured to detect a rotation speed of the main shaft,the controller being configured to diagnose whether the yaw bearing has a failure, based on a variation of the diagnosis parameter from an initial value thereof when the nacelle has a rotation speed within a first prescribed range excluding zero and when the main shaft has a rotation speed within a second prescribed range.
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Accused Products
Abstract
A condition monitoring system for a wind turbine comprises: a sensor which senses a condition of a yaw bearing; a monitor device which generates a diagnosis parameter based on a detection result of the sensor; a sensor which senses a rotating angular velocity of a nacelle and that of a main shaft; and a data server which diagnoses a failure of the yaw bearing based on the diagnosis parameter. The data server diagnoses whether the yaw bearing has a failure, based on a variation of the diagnosis parameter from an initial value thereof when the nacelle has a rotating angular velocity within a non-zero, first prescribed range and the main shaft has a rotating angular velocity within a second prescribed range.
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Citations
15 Claims
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1. A condition monitoring system configured to monitor a condition of equipment included in a wind turbine, the wind turbine including:
- a blade for converting wind power to rotation torque;
a main shaft receiving the rotation torque;
a power generator converting the rotation torque into electric power;
a nacelle provided on top of a tower and housing the main shaft and the power generator therein; and
a yaw bearing turnably supporting the nacelle on the top of the tower, the condition monitoring system comprising;a first detector configured to detect the condition of the equipment; a monitor device configured to generate a diagnosis parameter based on a detection result of the first detector; a controller configured to diagnose a failure of the equipment based on the diagnosis parameter; a second detector configured to detect a rotation speed of the nacelle; and a third detector configured to detect a rotation speed of the main shaft, the controller being configured to diagnose whether the yaw bearing has a failure, based on a variation of the diagnosis parameter from an initial value thereof when the nacelle has a rotation speed within a first prescribed range excluding zero and when the main shaft has a rotation speed within a second prescribed range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
- a blade for converting wind power to rotation torque;
Specification