Type Tests of a 10 kV/1 MVar High-Temperature Superconducting Air-Core Shunt Reactor

With the rapid expansion of power system and the increasing level of underground-cable deployment in urban grids, the reactive power generated can no longer be absorbed locally during off-peak demand periods. This results in a reverse flow of reactive power, drives abnormal voltage rise, and poses a significant threat to grid stability and security. This paper presents a potential solution based on high-temperature superconducting (HTS) shunt reactor, and also provides a systematic introduction to the type tests of the 10 kV/1 MVar HTS reactor in Shanghai. First, the paper outlines the core structure and system composition of the device. Subsequently, it details the routine and special test items designed for the superconducting reactor, explains the unique temperature dynamic balance state of the superconducting reactor, and estimates the AC loss values of the superconducting reactor during actual operation. The results of this paper provides a solid foundation for the future in-field demonstration of superconducting reactors.