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Electric vehicles

Modular Solid-State Transformer-Based Electric Vehicle Charging Stations: Advancements in Efficiency and Flexibility

Strategic Insights

— 1 min read

Recent research in the field of engineering has yielded promising results in the development of modular Solid-State Transformer (SST)-based electric vehicle (EV) charging stations. These stations operate without line frequency transformers, enabling efficient synchronization between EV batteries and renewable energy sources for quicker charging. The study, conducted by researchers at the School of Electrical Engineering, explores the design and control strategy of a modular two-stage SST-based bidirectional EV charging system.

Key Takeaways:

  • The researchers employed the Totem-pole PFC (TPLPFC) topology for front-end rectification and an isolated SEPIC (iSEPIC) converter in the output stage to minimize device count and simplify structural design.
  • The proposed configuration demonstrated enhanced flexibility and controllability, allowing for efficient synchronization between EV batteries and renewable energy sources.
  • Small signal transfer functions were derived, and controllers were designed accordingly to achieve optimal performance.
  • The proposed charger was simulated and analyzed, with results presented to highlight the benefits of the proposed configuration compared to those in literature.
  • The study concluded that the proposed modular two-stage SST-based bidirectional EV charging system offers advantages in terms of efficiency and flexibility.

Statistics:

  • The proposed topology aims to minimize device count and simplify structural design.
  • The isolated SEPIC (iSEPIC) converter in the output stage allows for straightforward control without sacrificing performance.
  • The simulation results confirmed the optimal performance of the proposed charger.
  • The proposed charger demonstrated enhanced flexibility and controllability, enabling efficient synchronization between EV batteries and renewable energy sources.

Sources:

  • Design and control of a modular two-stage SST-based bidirectional EV charger. Results in Engineering, 2025, 27():106462.
  • School of Electrical Engineering, Vellore Institute of Technology, Chennai, Tamil Nadu, 600127, India.

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