According to an official Weibo post by State-owned Assets Supervision and Administration Commission Xiaoxin, China’s first high-temperature superconducting low-voltage DC cable was connected to the grid and put into operation in Suzhou, Jiangsu.It is understood that my country has already made some explorations in the application of superconducting cables, but they are all AC superconducting cable demonstration projects. Compared with AC superconducting cables, high-temperature superconducting low-voltage DC cables can reduce power grid line losses by about 70%.
at the same time,The yttrium barium copper oxide (YBCO) second-generation high-temperature superconducting tape used in this project is a domestically produced material., which is the realization of the localization of the core materials of the superconducting cable system, and the cable adopts the coaxial method of positive and negative poles for the first time in China, and is currently the most compact superconducting cable.
This cable is the first time in China that the positive and negative poles are coaxial, which is equivalent to two cables in one. It is currently the most compact superconducting cable.
In addition, according to literature data, the loss of AC high-temperature superconducting cables is 3%-4%, while the loss of DC superconducting cables is only 1%-2%.