Method and device for processing signal fault of dual-speed sensor of gas turbine

Abstract

The invention discloses a method and a device for processing the signal fault of a dual-speed sensor of a gas turbine. The method comprises the following steps: processing a sensor signal and a faultdiagnosis parameter by a fault diagnosis module to obtain a sensor state signal; processing a sensor signal, a signal processing parameter and the sensor state signal by a signal processing module toobtain a sensor selected value and a sensor difference value signal; and processing a sensor difference signal, the sensor state signal and a alarm timing parameter by an alarm timing module to obtainan alarm signal. According to the method, preliminary trouble shooting can be carried out on the sensor signal, the sensor which is of obviously a hard fault is excluded from a calculation range, andthe calculated rotating speed value is ensured not to deviate too much.

Description

technical field [0001] The invention relates to the technical field of sensor fault diagnosis, in particular to a signal fault processing method and device for a gas turbine dual-speed sensor. Background technique [0002] With the rapid development of gas turbine technology and industry, the requirements for all aspects of gas turbines are getting higher and higher. It is necessary to ensure that it has higher safety and reliability and that its performance will not be affected. As the "nerve center" of the gas turbine, the gas turbine control system not only needs to ensure the efficient and stable operation of the gas turbine, but also needs to deal with various failures of the gas turbine in a timely manner so that it can continue to work safely and reliably, and avoid major accidents. The control basis of the gas turbine control system is the sensors installed in various parts of the gas turbine, so the reliability of the sensors and the credibility of the signals are v...

AI Technical Summary

Problems solved by technology

The general control system's processing method for sensor signals is to average multiple signals. This processing method will cause the measured value adopted by the control system to It is very inaccurate, so that the control system has insufficient control precision and may cause other major accidents

[0004] The installation of three redundant speed sensors is a relatively common and mainstream method, but installing three speed sensors will first increase the economic cost, and secondly, the installation of the sensors in the gearbox also requires a certain amount of space layout costs

[0005] There are also some devices that use a single speed sensor, which is sufficient for rotating mechanical equipment with low reliability requirements, but it is somewhat insufficient for mechanical equipment with high safety factor requirements such as gas turbines.

[0006] The dual-redundant speed sensor achieves the satisfaction of reliability, economy and layout cost, but the signal processing method of the dual-redundant speed sensor in the existing technology is too simple, just average the signal values ​​of the two sensors, The situation that the difference between the two signal values ​​is too large is not considered, and in the case of a sensor failure, the fault signal value cannot be eliminated in time and an alarm signal is issued

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