Xinhua News Agency, Shanghai, April 30, the first domestic 35-kilometre-kilometer high-temperature superconducting cable demonstration project built by the State Grid started in Shanghai on April 30. This is the first commercial application of high-temperature superconducting cable transmission technology in China. The localization rate of the core technology of the project is 100%, and it is expected to be completed and put into production at the end of 2020. At that time, it will become the world’s largest transmission capacity, the longest distance, and a fully commercialized 35 kV superconducting cable project.
High temperature superconducting power transmission is one of the most revolutionary engineering technologies in the current power industry. The so-called high-temperature superconductivity refers to the use of superconducting properties of superconducting materials in a liquid nitrogen environment close to minus 200 degrees Celsius relative to absolute zero degrees, so that the power transmission medium is close to zero resistance, and the power transmission loss is close to zero. Thus, large-capacity power transmission at a low voltage level is realized.
It is reported that the newly-built high-temperature superconducting cable demonstration project is one of the results of the strategic cooperation between the State Grid and Shanghai in the scientific and technological industry. In the central Xujiahui area, the total length of the line is about 1.2 kilometers. In the superconducting cable structure laid in the demonstration project, the core is two or thirty second-generation superconducting tapes with a thickness of only 0.4 mm, which is 100% localized from design to manufacturing.
Jiang Wei, Director of the New Materials Division of the Shanghai Municipal Commission of Economics and Information Technology, said that the demonstration project will provide comprehensive and systematic verification of independent high-temperature superconducting technology in central urban areas Reliability, stability and economy of grid-coupled operation, accumulate first-hand data and experience, lay the foundation for promoting the large-scale application of high-temperature superconducting materials in the transformation of smart grids, and become the industrialization of Shanghai’s cutting-edge new materials innovations Typical example.
(the original title is “China’s first kilometer-level high-temperature superconducting cable project starts in Shanghai”)