Failure Mode and Effect Analysis (FMEA) of Gas Turbine Power Plant System (GTPPS)

Failure Mode and Effect Analysis (FMEA) is an approach used for the system reliability analysis. In the present work, FMEA is applied to Gas Turbine Power Plant System (GTPPS). A total of 44 probable failure modes of main subsystems (i.e. compressor, combustion chamber, turbine, and generator) and auxiliary subsystems (i.e. fuel, oil, and electrical subsystems) have been identified and prioritized based on FMEA. The list of failure modes is ranked according to the assigned values in four different FMEA approaches: 1. Risk Priority Number (RPN), 2. Fuzzy RPN based on 10 membership functions, 3. Fuzzy RPN based on 100 membership functions, and 4. Aggregated Fuzzy RPN, where the higher the assigned values indicate the higher rank of criticality for the related failure mode. Furthermore, based on the obtained results, the analysis precision of the utilized approaches is compared and the type of required maintenance activity is proposed for critical failure mode as well. Keywords: Gas turbine, Failure mode and effect analysis, Power plant, Maintenance policy