Development of HTS transformers

With the improvement of high temperature superconductor (HTS) practical performance, research and development with regard to practical applications of HTS transformers have been progressed actively in the world. The current focus on the applied superconducting technology for HTS transformers has been moving to the industrial preparations from the laboratory research stage, and the technology has been well verified for practical applications from small to large scales. This paper provides a comprehensive and analytic summary on the development of HTS transformers with regard to various HTS power transformers, HTS traction transformers, fault current limiting transformers and the associated HTS transformer techniques.