FIELD: electrical power engineering.
SUBSTANCE: method concludes in registering voltage of damaged phase at buses of power supply in digital form and subsequent analyzing that voltage. Voltage to be measured is standardized from the moment of beginning of short-circuit in relation to breakdown voltage and sums of standard deviations
of measured standardized voltage um,i relatively to multiple calculated voltage curves uc,i,k derived preliminary in digital form for damaged chain of lines of the circuits. Numerical modeling of process of single-phase short-circuit is carried out for different distances to supply point. Distance to point of short-circuit is found from minimal standard deviation corresponding to specific calculated curve without avoiding switching power supply of damaged line off.
EFFECT: improved precision.
3 dwg
