Research and development of the world's first DC superconducting power transmission and battery system
[Financially supporting a course at Chubu University]
High temperature superconducting power transmission and battery technology
Nano-Optonics Energy conducts joint research with the university on basic technologies and battery technologies to be used for high efficiency, electrically powered transmission. Our goal is to realize the world's first working DC superconducting power transmission using high temperature superconductors, in order to build the world's most efficient power transmission system.
Superconducting power transmission test facility at
the Cooperative Research Center of
Advanced Technology at Chubu University
the Cooperative Research Center of
Advanced Technology at Chubu University
World's first DC high temperature superconducting power transmission
The aim is to perform the world's first DC superconducting power transmission using high temperature superconductors to transmit the largest current ever. To realize this goal, we are conducting research to reduce the pump power and pressure loss in the liquid nitrogen circulation system, and carrying out trial manufacture and evaluations of a new type of superconducting cable and an adiabatic double tube. The ends are thermally insulated by a new method called Peltier Current Lead (PCL). A special feature of this method is a new technique that will dramatically cut the intrusion of heat from the point of connection between the room temperature section and the liquid nitrogen cooling unit.
New Super Conducting Cable
Japan's first DC superconducting power transmission and battery
Why DC? Because at distances of 300 kilometers or more, DC power transmission is more efficient and less expensive. And superconducting power transmission lowers Joule loss to zero, permitting large current power transmission. The transmission of power on a global scale of 10,000 kilometers is no longer a dream.When superconducting power transmission with electric resistance of zero is realized, it will be possible to take advantage of the large inductance of the power transmission line and the characteristics of a large current to create battery systems that store electric power converted to magnetic energy.
Back to Edison
Throughout the world, the tide is turning to the DC current that Edison advocated. One result of this trend is worldwide research on power electronics.
Development of a PCL System
For all superconducting systems including not only power transmission but also superconducting motors, the thermal insulation of room temperature parts and superconducting parts is a technology essential for practical application. Permitting large-current flow while at the same time efficiently maintaining a temperature differential close to 200° are contradictory with conventional technology, but this new technology (PCL method) resolves this problem.
PCL System
A DC superconducting system brings the following benefits:
