Fault Analysis And Diagnosis For Heavy-duty Gas Turbine

With the rapid development of electric power industry, as well as the national requirements for environmental protection, high efficiency and energy saving, and low exhaust pollution has become a key requirement of modern power industry, gas turbine power plants get rapid development and have become the leading of the thermal power. In this paper, the main work includes:1.The gas turbine is connected between each feature and influence each other. One part’s failure will cause associated parts fault, even influence the whole system’s function. Gas turbine system failure involving the whole gas turbine components, so in order to fundamentally understand the failure mode and mechanism of the gas turbine, The 9-F gas turbine is used as the reasearch object. The function structure tree of the gas turbine is obtained, through analytic hierarchy to the generator’s structure and function.2. FMEA method is adopted to divide the gas turbine system failure into four subsystems and analyze the gas turbine’s components failure modes, fault characteristic, fault reasons, fault effects and analysis of fault handling measures.3. Through FTA method analysis the four subsystems of gas turbine, the bottom events’minimum cut sets are obtained. The attributes of the minimum cut sets are analyzed. Fault diagnosis method based on multiattributes is put forwatd, and apply it on the diagnosis of the gas turbine vibration fault. The results of this study have theoretical guidance and practical value to diagnosis and treatment the gas turbine fault.