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Equivalent Circuit Modeling Method for Real-Time Simulation of Multi-Active Bridge based Solid-State Transformer

The Solid-State Transformer (SST) technologies present a favorable opportunity in various domains within the distribution power system. By utilizing the high-frequency square wave voltage modulation, the SST can transfer high density power while reducing transformer size and weight. However, the high number of electronic switches and the high-frequency switching characteristic in SST introduce challenges to real-time simulation and hardware-in-the-loop (HIL) testing. This paper presents an equivalent model for real time simulation of Multi-Active Bridge (MAB) based SST systems. The proposed model is computationally efficient to improve simulation speed and maintains the model accuracy, which is demonstrated in case studies where the model is compared to a detailed reference model.