Experiment Studies of a DC Inductive Superconducting Fault Current Limiter With Energy Dissipation Capability

The fast dc fault current-limiting and the fast fault isolation are both necessary technologies in dc power system. In this research, a self-adaptive dc inductive superconducting fault current limiter (SFCL) with energy dissipation capability was proposed, which can restrict dc fault current rising-rate and amplitude at the initial stage of dc fault. At the same time, it can also accelerate the fault isolation speed of dc circuit breaker. The structure and working principle of the proposed SFCL was deeply discussed firstly, the mathematical model at different operation stages was calculated. Then, the dc short-circuit tests were carried out on the experiment platform which consist the SFCL prototype and a dc circuit breaker connected to it. Finally, according to the experiment results, the current-limiting performances of SFCL were detailedly analyzed, including the limitation rate, the fault current cleaning speed, the energy absorption, etc.