METHOD OF DETECTING FAULT IN 6( 10 )-35 kV ELECTRIC CIRCUIT WITH ISOLATED OR COMPENSATED NEUTRAL POINT

摘要

FIELD: electric measuring technique.;SUBSTANCE: method can be used at exploitation of three-phase electric circuit with isolated or compensated neutral point for quick detection of faults without switching consumers off. Meaning of constant parameter, namely inductivity of line, is preset. Damaged line is revealed. Parameters of transient process in damaged line are measured: instant value of voltage at moment of fault, instant value of current at moment of fault, voltage in neutral point, amplitude values of current in damaged line in time. Distance from substation to fault point is calculated on base of constant and measured parameters.;EFFECT: improved precision; higher speed of operation.;2 cl, 2 dwg