Parameter Investigation of Magneto-biased High Temperature Superconducting Fault Current Limiter in 10 kV Urban Power Grid

Superconducting fault current limiter (SFCL) can limit the increasing fault current in the power system with renewables and protect devices in renewable energy system. This paper focuses a novel magneto-biased high temperature SFCL mainly made of a double-split reactor and YBCO material. This paper investigates the influence of the SFCL parameter on its performance in a 10 kV urban power grid. This paper analyzes the SFCL's two-stage operating mechanism and establishes the SFCL model and 10 kV urban power grid model on MATLAB/SIMULINK. This paper discovers that the single branch reactance of the double-split reactor affects the fault current limiting rate at the first and the second peak of fault current, but the YBCO quench resistance only affect that at the first peak. The current limiting rate increases with these two parameters but the derivative decreases. This paper finally figures out a set of economically recommended reference value. When the YBCO quench resistance is 3.19 Ohm and the single branch reactance of double-split reactor is 4.99 Ohm, the current limiting rate is 48% at the first peak and 76% at the second peak in this 10 kV urban power grid.