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Fault Detection and Identification by Gas Path Analysis Approach in Heavy Duty Gas Turbine

[+] Author Affiliations
Stefania Della Gatta, Paolo Adami

University of Florence, Florence, Italy

Paper No. GT2006-90408, pp. 581-592; 12 pages
doi:10.1115/GT2006-90408
From:
  • ASME Turbo Expo 2006: Power for Land, Sea, and Air
  • Volume 2: Aircraft Engine; Ceramics; Coal, Biomass and Alternative Fuels; Controls, Diagnostics and Instrumentation; Environmental and Regulatory Affairs
  • Barcelona, Spain, May 8–11, 2006
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-4237-1 | eISBN: 0-7918-3774-2
  • Copyright © 2006 by ASME

abstract

The possibility to get information about gas turbine “health” state is largely based on availability and reliability of operational data and on-line acquisition systems. However, further instruments are needed in order to deduce useful information in maintenance scheduling from actually measured data. In Gas Path Analysis approaches, a model to simulate the engine behavior is required. Furthermore, in order to individuate, locate and evaluate faulty conditions, a diagnostic approach needs to be developed and introduced. This paper presents a critical discussion of the problem to highlight the main requirements of a diagnostic approach. Furthermore, some procedures to verify the ability of a diagnostic tool can be obtained directly from the theoretical background of GPA. To demonstrate how these procedures work, an application case has been examined. An engine model has been specifically developed for the monitored heavy-duty gas turbine. It allows to calculate thermodynamics data and to identify performance parameters through a mathematical modeling process. The suitability of this model to be introduced in a diagnostic system has been investigated. An exhaustive description of the procedures and discussion of results are reported.

Copyright © 2006 by ASME

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