Design of a Multi-Objective Power Electronic Smart Transformer for Smart Grid Applications

Document Type : Original Article

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Electrical Department, Faculty of Technology and Education, Sohag University, Sohag 82524, Egypt

Abstract

Transitioning to smart grids requires innovative technologies that enhance power distribution efficiency, resilience, and sustainability. This paper presents a comprehensive study of the power electronic smart transformer (PEST), a solid-state alternative to conventional transformers that enables real-time monitoring, bidirectional power flow, and the integration of renewable energy sources. The proposed power electronic smart transformer system features a modular, three-stage architecture with advanced control strategies optimized for grid stability, harmonic mitigation, and rapid dynamic response. Through MATLAB/Simulink simulations and experimental validation, the study demonstrates that the power electronic smart transformer achieves up to 99% efficiency, improves voltage stability by 30%, and keeps total harmonic distortion (THD) below 3%. Additionally, the system supports essential smart grid functionalities such as micro-grid islanding, Vehicle-to-Grid (V2G) interaction, and artificial intelligence-based predictive maintenance. This work bridges the gap between theoretical power electronic smart transformer models and practical deployment, providing a scalable solution for next-generation smart grids.

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Sohag Engineering Journal
Volume 5, Issue 2
September 2025
Pages 126-140

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