抄録
Superconducting technology is regarded to break through an obstacle of the future electric power transmission, because of its highly densified and large transmission capability. We propose a concept of the future power system composed of various superconducting apparatuses. A prototype model system named to “PROMISE (PROspective power transmission Model system Integrated under Superconducting Environment)” is constructed to prove the realization of the above concept. PROMISE is composed of superconducting transformer(60Hz, 6/3kV, 1000kVA class), superconducting fault current limiter(6kV, 200A class) and superconducting power cable(5m, 6kV, 650A class). This paper describes that PROMISE realized the transmission of the electric power of 3.8kV-46OkVA (50Hz). This is the first achievement of the world. The voltage-current synthetic test verified that PROMISE can withstand AC voltage of 6kV while it is carrying AC current of 170A (60Hz). The AC loss of superconducting cables, the heat leak of cryostat and the core loss of superconducting transformer are measured to estimate the transmission loss of PROMISE. These fundamental performances of PROMISE may indicate the feasibility of the future introduction of the superconducting technology for electric power system.
