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In December 2021, the 35-kV kilometer-level high-temperature superconducting (HTS) demonstration cable was officially connected to the grid in Xuhui District, Shanghai, China. A three-in-one HTS cable with a rated current of 2.2 kA, which replaces four-parallel lines XLPE cables, has been used in this project. This cable powers one of the busiest districts of Shanghai and serves to demonstrate and study the stability and reliability of a superconducting cable in the municipal power system. This project officially started in February 2019, and the type test of the prototype cable system was completed in November 2019. The commissioning test will be completed in November 2021. This paper introduces the main operating parameters, relevant research studies, and tests of this project.
Zong et al. (2022) studied this question.