Ground fault point locating system, ground fault locating method and program

摘要

To provide a ground point localization system that can identify a ground fault point even for a minute ground fault current.SOLUTION: This invention includes a plurality of sensors having a winding core formed in an annular shape such that a magnetic flux density of a magnetic flux generated when the ground fault current flows through a power line of a power system becomes equal to or less than a predetermined magnetic flux density value, and a coil wound around the winding core through which the electric power line is passed; a comparison specifying unit for specifying a second ground fault current indicating a current value smaller than a first ground fault current indicating the highest current value among the ground fault currents detected by each of the plurality of sensors; an amplification unit for amplifying a ground fault current waveform corresponding to a second ground fault current identified by the comparison specifying unit; and ground point localization unit identifying a change point representing a generation time of the second ground fault current in the ground fault current waveform amplified by the amplifying unit and showing the point at which the ground fault current in the power system is generated based on the change point.SELECTED DRAWING: Figure 6