Determination of a damaged connection in single-phase earth fault

Subject of research: single-phase earth faults in electrical networks medium voltage class.
 Purpose resarch: the development a simulation model for analysis transient processes that occur during "metallic" fault 35 kV network.
 Object distribution 6-35 operating isolated neutral mode.
 Main results was developed Matlab Simulink environment, which makes it possible to analyze oscillograms currents and voltages with an neutral. A method determining outgoing line is presented, based on superimposition non-power frequency currents. The source determined condition occurrence resonant mode. Oscillograms are from follows current damaged phase increases by more than 2 times, selectively determine connection.