Passivity-Based Current Control of a Dual-Active Bridge to Improve the Dynamic Response of a Solid-State Transformer During Power and Voltage Variations

Authors

K. Lopez-Rodriguez, A. Escobar-Mejia, E.Y. Piedrahita-Echavarria, W. Gil-Gonzalez

Abstract

The interest for smart-grids has grown worldwide and several utilities have begun to base their plans for expansion and modernization considering this concept. New trends to get more efficient, compact, and reliable power semiconductor devices, have motivated the development of new components such as the Solid-State Transformer (SST), which has become the key technology to be used in smart-grid applications. These advantages can be exploited by regulating the power flow in the dual-active bridge (DAB) of the SST. In this context, this paper focuses on proposing a passivity-based current controller for the DAB of an SST that regulates the power flow considering the passive behavior of DAB model and its port-Hamiltonian structure, which guarantees stability in closed-loop operation. To validate the proposed approach’s effectiveness, the closed-loop system is tested under different power variations, including bi-directional power flow, and its performance is compared with a conventional PI controller. In addition, input voltage variations are also considered. Results validated the controller’s capability of maintaining constant power flow in the event of input disturbances.

Citation

• Journal: 2020 IEEE 11th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)
• Year: 2020
• Volume:
• Issue:
• Pages: 230–235
• Publisher: IEEE
• DOI: 10.1109/pedg48541.2020.9244412

BibTeX

@inproceedings{Lopez_Rodriguez_2020,
  title={{Passivity-Based Current Control of a Dual-Active Bridge to Improve the Dynamic Response of a Solid-State Transformer During Power and Voltage Variations}},
  DOI={10.1109/pedg48541.2020.9244412},
  booktitle={{2020 IEEE 11th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)}},
  publisher={IEEE},
  author={Lopez-Rodriguez, K. and Escobar-Mejia, A. and Piedrahita-Echavarria, E.Y. and Gil-Gonzalez, W.},
  year={2020},
  pages={230--235}
}

Download the bib file

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