Blade monitoring system

摘要

In one embodiment, a blade monitoring system includes: at least one computing device configured to monitor a compressor during a load change by performing actions comprising: extracting a dynamic component of a blade time-of-arrival (TOA) deviation signal in response to the load change on the compressor; calculating, using the dynamic component, at least one of: a natural frequency of the GT compressor blade during the load change, an overshoot of the GT compressor blade during the load change, a rise time of the compressor blade during the load change, a damping factor of the compressor blade during the load change, or a settling time of the GT compressor blade after the load change; and determining whether the GT compressor blade is damaged based upon the at least one of: the natural frequency, the overshoot, the rise time, the damping factor, or the settling time.

主权项

1. A system for monitoring a compressor, the system comprising:
a sensor system for sensing a blade passing signal (BPS) of a passing compressor blade; and a blade monitoring system connected to the sensor system, the blade monitoring system performing actions comprising:
obtaining the BPS and extracting a time-of-arrival (TOA) signal from the BPS indicating a time-of-arrival (TOA) of the compressor blade;calculating a time-of-arrival (TOA) deviation signal by comparing the TOA signal with an expected time-of-arrival (TOA) signal for the compressor blade;detecting load change instructions instructing a change in position of at least one inlet guide vane on the compressor;extracting, in response to a load change on the compressor, a dynamic component of the TOA deviation signal, wherein the load change on the compressor is indicated by the load change instructions instructing the change in the position of the at least one inlet guide vane on the compressor, wherein the extracting is triggered by the detecting of the load change instructions;calculating, using the dynamic component, at least one of: a natural frequency of the compressor blade during the load change, an overshoot for the compressor blade during the load change, a rise time of the compressor blade during the load change, a damping factor of the compressor blade during the load change, or a settling time of the compressor blade after the load change;determining whether the compressor blade is damaged based upon the at least one of: the natural frequency, the overshoot, the rise time, the damping factor, or the settling time; anddetermining that the load change is occurring and sends instructions to extract the dynamic component of the TOA deviation signal.