A DAB-based Solid-State Transformer with high reliability as to the power supply

This paper presents the theoretical foundation, mathematical analysis and numerical simulation results of an interconnection between Dual-Active Bridge (DAB) converters applied as Solid-State Transformers (SST) with redundancy. This system enables current and voltage sharing among the converters and the achievement of high reliability as to the power supply. The main contribution of this study is to show an interconnection scheme that allows the construction of a fault-tolerant SST.