Development and applicability analysis of intelligent solid state transformer

The development of intelligent power grid provides a broad market to power electronic equipment. Compared with conventional transformer, intelligent solid state transformer(ISST) is pursuing smart control feature by power electronic converters and comprehensive controlling technology, which aims at voltage regulation, power transmission, isolation, and power quality improvement, etc. This paper analyzed the development of ISST. It highlights the design and application problems of power electronic device, bi-directional DC/DC converter topology and high-frequency transformer. It gives the fundamental terms for further design of ISST. And the future development directions of ISST are also discussed.