This study presents a novel research methodology and approach for diagnosing pertinent failures for power electronic converters. The concept of the generalised connection matrix for a sneak circuit analysis is used in this research. A novel modification to this process shown in this study produces a usable feature that provides unique signatures under fault scenarios and could be used to diagnose faults. The novelty lies in using component currents to form the generalised connection matrix. This study presents the results obtained using data collected from fault scenarios on a hardware set-up for the dc -dc buck converter.
The medium voltage direct current (MVDC)shipboard power system (SPS) will heavily rely on new and relatively unproven technology. With a lack of benchmark systems, the need to understand failures and their effects is vital for efficient fault identification, location and accommodation. For this, accurate fault diagnosis that could help betterinformed decision making will be required. Thus, it is imperative that research be conducted that enables risk mitigation aboard the notional warship. The aims of the research presented in this paper are to understand basic failure causes and effects, to aid the development of a shipboard automated diagnostic system, through failure mode and effects analysis (FMEA).
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