The construction of new energy infrastructures utilizing globally friendly hydrogen and power systems is attractive and important for sustainable development. An advanced superconducting power conditioning system composed of a hydrogen system and superconducting magnetic energy storage devices is proposed for effective use of renewable energy, and its verification test will be carried out. Superconducting coils of this system are wound with MgB2 wire and cooled by liquid hydrogen. The basic technology for the liquid hydrogen cooling system was developed and established under a high magnetic field. The MgB2 superconducting wire, which is economical and has high performance characteristics, has been intensively developed. This R&D should lead to a large reduction in the amount of carbon dioxide. In this paper, some important results obtained so far are described.
