Kangan Wang, Youngjong Ko, Rongwu Zhu, 等. Hybrid Modular Smart Transformer for Asymmetrically Bidirectional Power Flow Operation[J]. 中国电机工程学会电力与能源系统学报(英文), 2024,10(4):1384-1398.
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.
Kangan Wang, Youngjong Ko, Rongwu Zhu, 等. Hybrid Modular Smart Transformer for Asymmetrically Bidirectional Power Flow Operation[J]. 中国电机工程学会电力与能源系统学报(英文), 2024,10(4):1384-1398.DOI: 10.17775/CSEEJPES.2022.05650.
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.
Hybrid Modular Smart Transformer for Asymmetrically Bidirectional Power Flow Operation
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.