Abstract
This paper presents a methodology based on the failure mode and effect analysis (FMEA) to analyze the failures in the power stage of wind-fuel cell hybrid energy systems. Besides, fault tree analysis (FTA) is applied to describe the probabilistic failures in the vital subcomponents. Finally, the reliability assessment of the system is carried out for a five-year operation that is guaranteed by the manufacturer. So, as the result, the reliability analysis proves that the metal oxide semiconductor field effect transistor (MOSFET) and electrolytic capacitor are the most critical components that introduce damages in the power circuit. Moreover, a comparative study on the reliability assessment by the exponential distribution and the Weibull distribution show that the B1 lifetime obtained by the Weibull distribution is closer to reality.
Highlights
Renewable energy systems are rapidly growing in the power sector industry, such as wind turbines, solar energy, and fuel cells [1,2,3,4]
There are many studies of capacitors’ reliability and failure analysis [16,17,18] and this paper focuses on the metal oxide semiconductor field effect transistor (MOSFET) as a critical active subcomponent in the power stage and carrying out a diverse failure mechanism analysis of it by failure mode and effect analysis (FMEA) technique
This paper has presented a failure mechanism analysis of the power stage components in a hybrid wind-fuel cell system by using the FMEA and the fault tree analysis (FTA)
Summary
Renewable energy systems are rapidly growing in the power sector industry, such as wind turbines, solar energy, and fuel cells [1,2,3,4]. The power stage component is a critical part of the power conditioner subsystem in a PEMFC system which includes active and passive subcomponents. There are passive subcomponents including: Input and output electrolyte capacitors, transformer, choke, varistor, shunt resistor, fuse, and heatsink The functions of these components are filtering, transmission of current and voltage, and interconnection between different components. There are many studies of capacitors’ reliability and failure analysis [16,17,18] and this paper focuses on the MOSFET as a critical active subcomponent in the power stage and carrying out a diverse failure mechanism analysis of it by failure mode and effect analysis (FMEA) technique.
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