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— Renewable sources are replacing diesel aerators for sustainable aquaculture. The power electronic converters are inevitable and should be highly reliable to minimize crop loss in aquaculture. Recently, application-specific reliability case studies have gained more attention in the research fraternity. In this regard, new mission-profile-based reliability studies are conducted on the power converters of the grid-integrated PV-Battery systems for the sustainable aquaculture aerator application. In addition, a new energy management scheme is also proposed based on the state-of-charge of the battery for the DC link and AC link configured grid-integrated PV-battery system to ensure continuous power to the aerator load for the given environmental and operating conditions. Furthermore, a critical reliability analysis is performed for both DC and AC link configurations considering the failure of the power device, power diode, and capacitor of each converter in the system. The reliability analysis is extended to the converter and system level; the comparison is made in terms of the lifetime of the whole system in both configurations. This study revealed that the AC link configuration had ensured 24 years more than the DC-link configuration for 10% population failure ( B 10life) for the given load, mission profile, and energy management system.

Mission Profile Based Reliability Analysis of Power Converters in Grid Integrated PV-Battery System