In power system with grounding coil

the transient current includes plenty of fault information when single phase earth fault occurs. The fault information is extracted from transient current using wavelet transforms for fault line selection in this paper. On the other hand

there are steady state harmonic currents when single phase earth fault occurs to a system.The steady state harmonic currents also characterize the fault. Based on the information fusion of both steady and transient state of the grounding fault system

a new single phase fault line selection method is proposed in this paper. It can overcome system’s disturbance in most extent and improve accuracy of the fault line selection.