PEEMS (단국대학교 전력전자연구실)

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Jiho Ju, Dongho Choi and June-Seok Lee, "A Study on the Distributed-Control Architecture of a DSP-Based Solid-State Transformer System with Implementation," Energies, vol. 16, no. 16, Sep. 2023.

2023

PEEMS

Oct. 4, 2023

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1. Authors: Jiho Ju, Dongho Choi and June-Seok Lee

2. Title: A Study on the Distributed-Control Architecture of a DSP-Based Solid-State Transformer System with Implementation

3. Journal: Energies

4. Vol/no/pp: vol. 16, no. 16

5. Date: Sep. 2023

6. Abstract

: This article proposes a Distributed-control Architecture (D-CA) and an operation sequence with start-up strategies for a Digital Signal Processor (DSP)-based Solid-State Transformer (SST). Although various control techniques for SSTs have been reported in earlier studies, there is still a lack of research covering comprehensive content, including hierarchical control architectures and operation sequences with start-ups considering the implementation of DSPs. Therefore, this article addresses the following factors of SST. First, the D-CA is described for the design of the hierarchy between control boards. With the D-CA, because sub-boards are in charge of their corresponding DC-link voltage balancing control individually, the computational burden on the master board can be reduced. Second, the operation sequence of the SST system is explained based on the SST with D-CA. The step of DC-link voltage balance is considered throughout the entire operation sequence for safe driving. Furthermore, the PWM start-up strategies for a Cascade H-bridge Multilevel (CHM) converter and Dual Active Bridge (DAB) converter are proposed to prevent switching pulse errors caused by DSP operating characteristics. These start-up strategies reduce the current surges. The validity of the proposed D-CA and operation sequence with start-up strategies are verified by experimental results.

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