A Review of Solid-State Transformer-Based Ultra-Fast Charging Station Technologies: Topologies, Control, and Grid Interaction

Hanbing Xiao, Krishnamachar Prasad () and Jeff Kilby
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Hanbing Xiao: School of Engineering, Computer and Mathematical Sciences, Auckland University of Technology, Auckland 1010, New Zealand
Krishnamachar Prasad: School of Engineering, Computer and Mathematical Sciences, Auckland University of Technology, Auckland 1010, New Zealand
Jeff Kilby: School of Engineering, Computer and Mathematical Sciences, Auckland University of Technology, Auckland 1010, New Zealand

Energies, 2025, vol. 18, issue 17, 1-43

Abstract: Solid-state transformer (SST)-based ultra-fast charging stations (UFCSs) are emerging as a key technology in next-generation electric vehicle (EV) infrastructure, addressing the growing demand for efficient charging. Unlike traditional line-frequency transformers, SSTs offer higher energy conversion efficiency, smaller size, and better scalability. However, challenges such as control complexity and grid stability remain. This review analyzes existing SST topologies (both classical and new) and control methods, discussing their impact on system performance, and finally, it provides an outlook on future technological trends.

Keywords: solid-state transformer (SST); ultra-fast charging stations (UFCSs); electric vehicles (EVs); SST topologies; control methods; energy conversion efficiency; grid stability (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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