Solid-State Transformers in the Global Clean Energy Transition: Decarbonization Impact and Lifecycle Performance

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

🔬研究者:Provides a standardized LCA framework and benchmarks for SST vs. conventional transformers across multiple grid applications.

🏢実務担当者:Offers quantified lifecycle CO2 reductions (10-30%) to inform procurement and grid modernization strategies.

🏛政策担当者:Highlights SSTs as an enabling technology for clean energy targets, warranting support for demonstration projects and reliability standards.

The global clean energy transition requires power conversion technologies that combine high efficiency, operational flexibility, and reduced environmental impact over their entire service life. Solid-state transformers (SSTs) have emerged as a promising alternative to conventional line-frequency transformers, offering bidirectional power flow, high-frequency isolation, and advanced control capabilities that support renewable integration and electrified infrastructures. This paper presents a comparative life cycle assessment (LCA) of conventional transformers and SSTs across representative power-system applications, including residential and industrial distribution networks, electric vehicle fast-charging infrastructure, and transmission–distribution interface substations. The analysis follows a cradle-to-grave approach and is based on literature-derived LCA data, manufacturer specifications, and harmonized engineering assumptions applied consistently across all case studies. The results show that, under identical assumptions, SST-based solutions are associated with indicative lifecycle CO2 emission reductions of approximately 10–30% compared to conventional transformers, depending on power rating and operating profile (≈90–1000 t CO2 over 25 years across the four cases). These reductions are primarily driven by lower operational losses and reduced material intensity, while additional system-level benefits arise from enhanced controllability and compatibility with renewable-rich and hybrid AC/DC grids. The study also identifies key challenges that influence the sustainability performance of SSTs, including higher capital cost, thermal management requirements, and the long-term reliability of power-electronic components. Overall, the results indicate that SSTs represent a relevant enabling technology for future low-carbon power systems, while highlighting the importance of transparent assumptions and lifecycle-oriented evaluation when comparing emerging grid technologies.

• semanticscholar https://doi.org/10.3390/en19020558first seen 2026-05-15 19:44:00