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

doi:10.3390/su14010319

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

2021-12-29

15

OA

AI

Thanikanti Sudhakar Babu

DOI：10.3390/su14010319

Original

Original request for help

Save

Abstract

En 中文

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.

Keywords:

solid-state transformer (SST)

low-frequency transformer (LFT)

power electronic converters

future smart distribution grid

SST topologies

renewable energy sources

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

Abstract

Journal

Organization