Flexible Bidirectional Converter Connecting DC and AC Microgrids for Smart Grid

International Journal of Electrical and Electronics Engineering

© 2025 by SSRG - IJEEE Journal

Volume 12 Issue 6

Year of Publication : 2025

Authors : Nguyen The Vinh

10.14445/23488379/IJEEE-V12I6P113

How to Cite?

Nguyen The Vinh, "Flexible Bidirectional Converter Connecting DC and AC Microgrids for Smart Grid," SSRG International Journal of Electrical and Electronics Engineering, vol. 12,  no. 6, pp. 158-168, 2025. Crossref, https://doi.org/10.14445/23488379/IJEEE-V12I6P113

Abstract:

Currently, implementing a hybrid micro-power system in the power system has received significant attention from recent researchers. The flexible connection and exchange of energy in independent or grid-connected multi-microgrid systems is studied for multi-function converters. In addition, the issue of appropriate energy management, saving and stabilizing the power system from distributed energy sources (renewable energy sources) is necessary to provide continuous supply to the loads. The current power system has mixed DC and AC microgrids integrating many sub-grids. The energy exchange between those grids requires basic energy converters such as DC/DC, DC/AC and AC/DC. This work presents a multifunction converter structure that integrates a two-way power conversion method in grid-connected or independent DC/DC/AC/DC for microgrids. In this converter system, the non-isolated form uses two-way power electronic locking technology derived from the basic principle of Flyback, Boost, Buck and full bridge converters. The power grids consist of two DC microgrids and one AC microgrid capable of grid connection and independent operation. Flexible operation is realized with the combination of 3 microgrids, so the converter ensures each specific case for efficient energy use from distributed sources. The results of the simulation and experiment in the laboratory are compared.

Keywords:

Bidirectional DC/DC converters, DC/AC converters, AC/DC converters, Batteries, Hybrid power systems.

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