Hybrid Modular Smart Transformer for Asymmetrically Bidirectional Power Flow Operation

Kangan Wang; Youngjong Ko; Rongwu Zhu; Siyu Wu; Weimin Wu; Marco Liserre

doi:10.17775/CSEEJPES.2022.05650

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Hybrid Modular Smart Transformer for Asymmetrically Bidirectional Power Flow Operation

Regular Papers | 更新时间：2026-10-15

- Hybrid Modular Smart Transformer for Asymmetrically Bidirectional Power Flow Operation
- CSEE Journal of Power and Energy Systems Vol. 10, Issue 4, Pages: 1384-1398(2024)
- 作者机构：
  
  1. Shanghai Maritime University,Shanghai,China
  2. Pukyong National University, Busan, South Korea
  3. Harbin Institute of Technology (), Shenzhen,Shenzhen,China
  4. Kiel University,Kiel,Germany
- 作者简介：
- 基金信息：
- DOI：10.17775/CSEEJPES.2022.05650
  CLC：
- Published：01 July 2024
- 稿件说明：
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Kangan Wang, Youngjong Ko, Rongwu Zhu, et al. Hybrid Modular Smart Transformer for Asymmetrically Bidirectional Power Flow Operation[J]. CSEE Journal of Power and Energy Systems, 2024, 10(4): 1384-1398.
DOI：

Kangan Wang, Youngjong Ko, Rongwu Zhu, et al. Hybrid Modular Smart Transformer for Asymmetrically Bidirectional Power Flow Operation[J]. CSEE Journal of Power and Energy Systems, 2024, 10(4): 1384-1398. DOI： 10.17775/CSEEJPES.2022.05650.

摘要

Abstract

The presence of renewable energy resources in LV distribution networks may lead to a distribution transformer

also known as a Smart Transformer (ST)

experiencing the bidirectional power flow. Therefore

the ST must have the capability to operate in both directions. However

the reverse power is less as compared to the forward power

thus the design of ST with the same capacity in both directions increases the hardware cost and decreases the system efficiency. This paper proposes a Hybrid-modular-ST (H-ST)

composed of a mixed use of single active bridge-based series resonant converter and dual active bridge instead of complete use of uni-or bi-directional converter adopted in the conventional solid-state-transformer. Based on the proposed H-ST

the impacts of power imbalance among cascaded modules in reverse operation mode are analyzed and then an effective solution based on reactive power compensation combined with the characteristics of the proposed architecture is adopted. The simulation and experimental results clearly validate the effectiveness and feasibility of the theoretical analyses.

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