China's first 35 kV high-temperature superconducting cable demonstration project has started construction by State Grid in Shanghai and it is expected to be completed by the end of the year.
This is the world's largest transmission capacity, the longest distance, 2000A current the highest commercial 35 kV superconducting cable project.
The temperature required to achieve superconductivity is very low, close to -273°C absolute zero, and today's technology is capable of high temperature superconductivity.
With a temperature of -196°C, which is the temperature range required for liquid nitrogen liquefaction, the technology can greatly improve the losses in power transmission due to a resistance of 0.
The high-temperature superconducting cable project is one of the results of the strategic cooperation between the State Grid and the Shanghai Municipal Government in the science and technology industry.
The core of the superconducting cable structure laid in the demonstration project is 20 or 30 second-generation superconducting strips of only 0.4 mm thick, which are 100% localized from design to production.
This 1.2 km high-temperature superconducting cable demonstration project aims to validate the reliability, stability and economy of autonomous high-temperature superconducting technology for coupled operation with the grid in mega-city urban centers, accumulating data and experience.