Hybrid Modular Smart Transformer for Asymmetrically Bidirectional Power Flow Operation

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外文摘要：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 bidirec-tional 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.

外文关键词：

Cascaded H-bridgedual-active bridgeseries resonant convertersmart transformer(ST)three-stage architecture

作者：

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

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作者单位：

Shanghai Maritime University,Shanghai 201306,China

Pukyong National University,Busan 48513,South Korea

Harbin Institute of Technology(Shenzhen),Shenzhen 518000,China

Kiel University,Kiel 24118,Germany

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基金：

National Key Research & Development Project of ChinaShanghai 2022 Science and Technology Innovation Action Plan-Star Cultivation(Sailing Program)National Natural Science Foundation of China

项目编号：

2017YFE013430022YF141570052307215

出版年：

2024

DOI：

10.17775/CSEEJPES.2022.05650

中国电机工程学会电力与能源系统学报(英文版)

中国电机工程学会

中国电机工程学会电力与能源系统学报(英文版)

CSTPCDEI

ISSN：2096-0042

年,卷(期)：2024.10(4)