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Solid-State Transformers: Fundamentals, Topologies, Applications, and Future Challenges

Author

Listed:
  • Saniya Khan

    (Department of Electrical Engineering, ZHCET, Aligarh Muslim University, Aligarh 202002, India)

  • Khaliqur Rahman

    (Department of Electrical Engineering, ZHCET, Aligarh Muslim University, Aligarh 202002, India)

  • Mohd Tariq

    (Department of Electrical Engineering, ZHCET, Aligarh Muslim University, Aligarh 202002, India)

  • Salman Hameed

    (Department of Electrical Engineering, ZHCET, Aligarh Muslim University, Aligarh 202002, India)

  • Basem Alamri

    (Department of Electrical Engineering, College of Engineering, Taif University, Taif 21944, Saudi Arabia)

  • Thanikanti Sudhakar Babu

    (Department of Electrical and Electronics Engineering, Chaitanya Bharathi Institute of Technology, Hyderabad 500075, India)

Abstract

Solid-state transformers (SSTs) have emerged as a superior alternative to conventional transformers and are regarded as the building block of the future smart grid. They incorporate power electronics circuitry and high-frequency operation, which allows high controllability and enables bi-directional power flow, overcoming the limitations of conventional transformers. This paper presents a detailed analysis of the solid-state transformer, expounding the fundamentals, converter topologies, applications, and future challenges of the SST in a systematic manner. The paper discusses the necessity of improved replacement of the low-frequency transformers (LFTs) and presents the configuration of SST. It presents SST fundamentals in individual stages and explores its origin and evolution. The basic topologies, their specifications, and control strategies are also described. The applications of SST as a replacement of LFTs are discussed along with recent applications. The future challenges for real-time implementation of SSTs are explored, and research directions are proposed.

Suggested Citation

  • Saniya Khan & Khaliqur Rahman & Mohd Tariq & Salman Hameed & Basem Alamri & Thanikanti Sudhakar Babu, 2021. "Solid-State Transformers: Fundamentals, Topologies, Applications, and Future Challenges," Sustainability, MDPI, vol. 14(1), pages 1-20, December.
    • Handle: RePEc:gam:jsusta:v:14:y:2021:i:1:p:319-:d:713315
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