Fault detection system and method for overspeed protection speed sensors
First Claim
1. A fault detection system for an over-speed protection system of a rotating machine including a first speed sensor, second speed sensor, and third speed sensor sensing a speed of a shaft of the rotating machine, the system comprising:
- a first input configured to receive a first pulse train from the first speed sensor;
a second input configured to receive a second pulse train from the second speed sensor;
a third input configured to receive a third pulse train from the third speed sensor; and
a processor configured to generate a shutdown signal for the rotating machine based on the first pulse train, the second pulse train, and the third pulse train;
a first error integrator configured to process the first pulse train and the second pulse train and output a first fault signal;
a second error integrator configured to process the first pulse train and the third pulse train and output a second fault signal; and
a third error integrator configured to process the second pulse train and the third pulse train and output a third fault signal, whereinthe processor generates the shutdown signal for the rotating machine based on the first fault signal, the second fault signal, and the third fault signal.
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Accused Products
Abstract
A fault detection system for an over-speed protection system of a rotating machine includes a first speed sensor, second speed sensor, and third speed sensor sensing a speed of a shaft of the rotating machine. The system includes a first input configured to receive a first pulse train from the first speed sensor, a second input configured to receive a second pulse train from the second speed sensor, a third input configured to receive a third pulse train from the third speed sensor, and a processor configured to generate a shutdown signal for the rotating machine based on the first pulse train, the second pulse train, and the third pulse train.
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Citations
17 Claims
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1. A fault detection system for an over-speed protection system of a rotating machine including a first speed sensor, second speed sensor, and third speed sensor sensing a speed of a shaft of the rotating machine, the system comprising:
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a first input configured to receive a first pulse train from the first speed sensor; a second input configured to receive a second pulse train from the second speed sensor; a third input configured to receive a third pulse train from the third speed sensor; and a processor configured to generate a shutdown signal for the rotating machine based on the first pulse train, the second pulse train, and the third pulse train; a first error integrator configured to process the first pulse train and the second pulse train and output a first fault signal; a second error integrator configured to process the first pulse train and the third pulse train and output a second fault signal; and a third error integrator configured to process the second pulse train and the third pulse train and output a third fault signal, wherein the processor generates the shutdown signal for the rotating machine based on the first fault signal, the second fault signal, and the third fault signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A programmable logic device programmed to perform fault detection of an over-speed protection system for a rotating machine including a first speed sensor, second speed sensor, and third speed sensor sensing a speed of a shaft of the rotating machine, the device comprising:
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a first input configured to receive a first pulse train from the first speed sensor; a second input configured to receive a second pulse train from the second speed sensor; a third input configured to receive a third pulse train from the third speed sensor; and a processor configured to generate a shutdown signal for the rotating machine based on the first pulse train, the second pulse train, and the third pulse train; a first error integrator configured to process the first pulse train and the second pulse train and output a first fault signal; a second error integrator configured to process the first pulse train and the third pulse train and output a second fault signal; and a third error integrator configured to process the second pulse train and the third pulse train and output a third fault signal, wherein the processor generates the shutdown signal for the rotating machine based on the first fault signal, the second fault signal, and the third fault signal. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method, implemented by a processor, of detecting faults in an over-speed protection system of a rotating machine, the method comprising:
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determining whether a first pulse train is received from a first speed sensor sensing a first speed of a shaft of the rotating machine; determining whether a second pulse train is received from a second speed sensor sensing a second speed of the shaft; determining whether a third pulse train is received from a third speed sensor sensing a third speed of the shaft; and when a specified number of the first pulse train, the second pulse train, and the third pulse train are determined to not be received, outputting a shutdown signal based on processing the first pulse train, the second pulse train, and the third pulse train, wherein the processing the first pulse train, the second pulse train, and the third pulse train includes comparing a number of pulses in the first pulse train with a number of pulses in the second pulse train in a first comparison and with a number of pulses in the third pulse train in a second comparison and comparing the number of pulses in the second pulse train with the number of pulses in the third pulse train in a third comparison. - View Dependent Claims (16, 17)
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Specification