FIELD: electricity.
SUBSTANCE: arrays of instantaneous current values in the secondary winding are registered, as well as voltages of primary and secondary windings of transformer. Current values of current in the secondary winding, as well as voltages of primary and secondary windings are identified. Value of measured grid frequency ratio to rated value is determined. Arrays of instantaneous values and current values of primary and secondary windings voltages are used to identify value of phase shift angle between voltages of primary and secondary windings. Current value of primary winding voltage is reduced to the secondary circuit with the help of reduction ratio. Values of current voltage value in the secondary winding, reduced current value of the primary winding voltage and angle of phase shift between voltages of primary and secondary windings are used to identify current value of total voltage drop on primary and secondary windings. Value of active current value in the secondary winding, value of measured grid frequency ratio to rated value of frequency and active value of total voltage drop in primary and secondary windings are used to determine value of short-circuit resistance in transformer.
EFFECT: operative control of short-circuit resistance in working mode with the possibility to register dynamics of change in time.
1 dwg, 3 tbl
