A fault location method for single-phase grounding fault in distribution network

The single-phase grounding fault is the most common fault among all types of faults in distribution network. It is of great importance to locate the single phase grounding fault accurately and quickly for reducing economic losses. Aiming at the location of single-phase grounding fault in distribution network, this paper puts forward a new fault location method which uses differential evolution algorithm and the Impedance Model Fault Characteristics Matching Technology. The proposed method uses stored fault voltage information, the measured zero sequence voltage and current signals of the feeder in the fault duration time. And the fitness index of the system fault characteristics is defined. After identifying the potential fault branches by using enumeration method, the fault can be located accurately by using the differential evolution algorithm. The detailed simulation results in 10 kV distribution network model of the SINPOPEC West-Northern oil field is given in this paper. The simulation results suggest the validity of the proposed single-phase grounding fault location method.