Soft-switching Solid-State Transformer: A comprehensive review

Suma H R 1, *, Sunil Kumar G 2 and Vijayaprakash R M 3

1 Department of Electronics and Communication, Government Polytechnic, K.R. Pet-571426, Karnataka, India.
2 Department of Electrical and Electronics, Government Polytechnic, K.R. Pet-571426, Karnataka, India.
3 Department of Electronics and Communication, Government Polytechnic, Belur- 573115, Karnataka, India.
 
Review Article
World Journal of Advanced Research and Reviews, 2021, 10(02), 293-302
Article DOI: 10.30574/wjarr.2021.10.2.0210
 
Publication history: 
Received on 02 May 2021; revised on 10 May 2021; accepted on 22 May 2021
 
Abstract: 
The solid state transformer (SST) has emerged as a pivotal technology in modern power electronics, offering superior performance compared to conventional transformers through advanced semiconductor switching techniques. This paper presents a comprehensive review of soft-switching solid state transformers, examining their operational principles, topological configurations, control strategies, and practical applications. The integration of soft-switching techniques in SST designs significantly reduces switching losses, electromagnetic interference, and thermal stress while improving overall system efficiency. Through detailed analysis of various soft-switching methodologies including zero-voltage switching (ZVS) and zero-current switching (ZCS), this research highlights the technological advancements that have made SSTs viable for high-power applications. The paper also addresses the challenges and future prospects of soft-switching SST technology in the context of smart grid integration and renewable energy systems.
 
Keywords: 
Solid State Transformer; Soft-switching; Zero-voltage switching; Zero-current switching; Power electronics; Smart grid
 
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