Nano-Optonics Energy Inc and Chubu University succeeded in a superconducting direct-current (DC) power transmission over a distance of 200m for the first time in the world.
The Superconductivity & Sustainable Energy Center of Chubu University, which has been collaborating with Nano-Optonics Energy, conducted the experiment as part of the company's Superconducting DC Power Transmission Project.
The transmission loss of superconducting DC power transmission is about 1/10 that of superconducting alternating-current (AC) power transmission and about 1/30 that of normal AC power transmission. When the voltage is 275kV, the transmission loss is about 20kW/km.
Because superconducting DC power transmission can reduce the required amount of electricity generated at power plants by reducing transmission loss, it is now gathering attention as an important technology for a low-carbon society.
In addition, electricity generated from, for example, sunlight and wind is direct current. If such electricity can be transmitted without converting it into AC electricity, the loss caused by conversion can be eliminated.
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