After two years of research and development, the world's first hollow circular superconducting reactor is put into operation in Shanghai.

On February 10th, the world's first 10 kV/1 trillion ohm hollow ring superconducting reactor was officially put into operation at the 35 kV Gulong substation. The device was jointly developed by State Grid Shanghai Electric Power Company, Shanghai Yixi Technology, Shanghai Jiaotong University, Wujiang Transformer Co., Ltd., and other universities and enterprises. According to Shanghai power department on February 12, this operation marks another major breakthrough for China in the research and engineering application of superconducting power equipment, providing an innovative solution for upgrading urban power grids worldwide.