Monitoring a degrading system

Details Monitoring a degrading system Monitoring a degrading system

2011-08-16

2011-08-16

Nghiem, Michael P (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system

Statistical measurement

C702S034000, C702S184000, C702S185000

Reexamination Certificate

active

08000930

ABSTRACT:
The present disclosure is concerned with the identification of fault origins of slowly degrading systems such as industrial gas turbines. Following the initial input of some parameter values, exemplary procedure comprises a number of steps which are repeated periodically during the operation of the gas turbine. First, for each potential fault such as e.g. a contamination of compressor blades, erosion of turbine blades or corrosion of machine parts, a pre-symptom fault probability, characteristic of the specific gas turbine considered, and a symptom-conditional fault probability are calculated. In a second step, on-line data from the monitoring devices are loaded in order to update information about symptoms such as e.g. reductions in polytropic efficiency and in flow capacity, changes in vibration spectrum, or other machine condition indicators, and a post-symptom fault probability is calculated. In a third step, the calculated fault probabilities are displayed and transmitted to a planning system for scheduling of gas turbine operation or maintenance actions.

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