Characterization of Fault Current Patterns of 3-Phase MFCL Under 3 Lines-to-Ground Fault

We analysed the characteristics of the single, double and triple lines-to-ground fault of matrix type SFCLs (MFCL) with reactors for magnetic field. We compared characteristics of our MFCLs with those of resistive type SFCLs without reactors under the same experimental conditions. The magnitude of a limited fault current of MFCLs with a reactor according to fault voltages showed similar patterns directly after a fault. Also, the current limiting characteristics of MFCLs according to turn numbers of reactors showed similar patterns directly after a fault. However, the limitation of fault currents after 3 cycles showed a tendency to increase with increasing applying voltages. Our MFCLs had balanced patterns of limited currents between the R, S, and T phases. However unbalanced patterns of limited currents were observed in case of resistive-type SFCLs. It was because of unbalanced quenches between superconducting elements in resistive-type SFCLs and each phase. We reported the experimental results in terms of the properties of quenches, patterns of limited currents and limited voltages in the R, S and T phase systems.