Experiment of a Resistive Superconducting Fault Current Limiter Based on MgB2 under Different Supply Voltages
In order to limit the short-circuit current, and to prevent the power grid and its equipment from the shock of the short circuit, the fault current limiter with detection, trigger and limiting was introduced. A small resistive type superconducting fault current limiter prototype based on MgB2, cooled by liquid helium and heliumgas, was developed and tested by a test system. The test result showed that the prototype based on MgB2 produced superior limiting performance, the short-circuit current suppressing ratio was up to more than 45%, and with the rise of the voltage level, the current limiting capability was also gradually increased, up to 56%.
L. Yao et al., "Experiment of a Resistive Superconducting Fault Current Limiter Based on MgB2 under Different Supply Voltages", Advanced Materials Research, Vol. 721, pp. 527-530, 2013