The Achieving of Gas Turbine's Gas Path Fault Criterion

摘要

In this paper the mathematical model of a certain kind of gas turbine was built based on parts thermodynamic characteristics and matching of components considering outside and boundary conditions. On the basis of this model, small deviation equations were produced by using small deviation method. Then, the standard fault model was acquired through introducing fault factors into the small deviation equations, which, further imported with actual operating data, educed the small deviation influence coefficient matrix. This matrix, combined with gas path fault variable criterion of performance parameters, would then ascertain the membership size relationship between typical gas path faults and measurement parameters. Finally, the typical gas path fault variable criterion of measurement parameters was deduced, which lays the foundation for gas path fault diagnosis of gas turbine.