Abstract: The development of renewable energy and clean energy sources is a major trend today. As more and more renewable energy sources are being integrated into the electrical power grid, there is an ever increasing demand for direct current (DC) power transmission and large-scale energy storage. Consequently, superconducting DC power transmission, DC superconducting fault current limiters and power storage technology based on superconductivity have potential application prospects. This paper presents an overview of the principle, advantages, and recent development of these DC superconducting power devices.