System and method for determining pole shift
First Claim
1. A generator airgap monitoring system, comprising:
- a first proximity sensor disposed in a first location of a stator and configured to transmit a first signal representative of a first distance between the first proximity sensor and a plurality of rotor poles of a rotor;
a controller communicatively coupled to the first proximity sensor, wherein the controller is configured to derive a first plurality of instantaneous airgaps based on the first signal and to determine a difference between a first instantaneous airgap of the first plurality of instantaneous airgaps and a second instantaneous airgap of the first plurality of instantaneous airgaps, wherein the first plurality of instantaneous airgaps comprises a first plurality of measurements of airgaps between the stator and the plurality of rotor poles when the rotor is rotating, the first instantaneous airgap comprises a first measurement, derived by using the first proximity sensor, of a first airgap between the stator and a first rotor pole of the plurality of rotor poles, and the second instantaneous airgap comprises a second measurement, derived by using the first proximity sensor, of a second airgap between the stator and a second rotor pole of the plurality of rotor poles.
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Accused Products
Abstract
A generator airgap monitoring system includes a first proximity sensor disposed in a first location of a stator and configured to transmit a first signal representative of a first distance between the first proximity sensor and a plurality of rotor poles of a rotor, and a controller communicatively coupled to the first proximity sensor. The controller is configured to derive a first plurality of instantaneous airgaps based on the first signal and to determine a difference between a first instantaneous airgap of the first plurality of instantaneous airgaps and a second instantaneous airgap of the first plurality of instantaneous airgaps. The first plurality of instantaneous airgaps includes a first plurality of measurements of airgaps between the stator and the plurality of rotor poles when the rotor is rotating. The first instantaneous airgap and the second instantaneous airgaps include measurements for respective rotor poles.
19 Citations
20 Claims
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1. A generator airgap monitoring system, comprising:
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a first proximity sensor disposed in a first location of a stator and configured to transmit a first signal representative of a first distance between the first proximity sensor and a plurality of rotor poles of a rotor; a controller communicatively coupled to the first proximity sensor, wherein the controller is configured to derive a first plurality of instantaneous airgaps based on the first signal and to determine a difference between a first instantaneous airgap of the first plurality of instantaneous airgaps and a second instantaneous airgap of the first plurality of instantaneous airgaps, wherein the first plurality of instantaneous airgaps comprises a first plurality of measurements of airgaps between the stator and the plurality of rotor poles when the rotor is rotating, the first instantaneous airgap comprises a first measurement, derived by using the first proximity sensor, of a first airgap between the stator and a first rotor pole of the plurality of rotor poles, and the second instantaneous airgap comprises a second measurement, derived by using the first proximity sensor, of a second airgap between the stator and a second rotor pole of the plurality of rotor poles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of monitoring a generator system, comprising:
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sensing a first plurality of instantaneous airgaps between a plurality of rotor poles and a stator of the generator system by using a first proximity sensor disposed in the stator; assigning each instantaneous airgap of the first plurality of instantaneous airgaps to a respective rotor pole of the plurality of rotor poles; and determining a difference between each assigned instantaneous airgap of the first plurality of instantaneous airgaps and a baseline airgap for the respective rotor pole. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A generator system, comprising:
a non-transitory tangible computer-readable medium comprising executable code, the executable code comprising instructions for; sensing a plurality of instantaneous airgaps between a plurality of rotor poles and a stator of a generator using a proximity sensor disposed in the stator; assigning each instantaneous airgap of the plurality of instantaneous airgaps to a respective rotor pole of the plurality of rotor poles; and determining a plurality of differences corresponding to the difference between each assigned instantaneous airgap and a baseline airgap for the respective rotor pole. - View Dependent Claims (19, 20)
Specification