FIELD: measuring equipment.
SUBSTANCE: invention relates to measuring equipment and can be used to determine the parameters of a T-shaped substitution circuit (SC) of single-phase two-winding transformers. Essence: arrays of instantaneous values of input current and voltage and output current and voltage for one and the same time points are registered, arrays of instantaneous values of output current and output voltage brought to the primary circuit are formed, the array of instantaneous values of the magnetization current as the difference of instantaneous values of input and reduced output currents is determined, the instantaneous values of the voltage applied to the magnetization branch as the difference of instantaneous values of input voltage and the difference of instantaneous values of input voltage and output voltage, divided by two are determined, determine the instantaneous values of the voltage drop on the transformer windings as the difference between the instantaneous values of the input voltage and the reduced output voltage, the instantaneous values of the current in the transformer windings as the sum of the instantaneous values of the input current and the reduced output current are determined, then the effective values of the magnetization current, the effective values of the voltage applied to the magnetization branch, the voltage drop on the transformer windings and the current in the transformer windings are determined. Next, the values of active magnetic losses in the transformer and active losses in the transformer windings, the total power in the transformer windings and the magnetic system are determined. After that, the impedance modulus of the transformer and magnetic system windings replacement circuit is calculated, and then the active and inductive resistances of the T-shaped replacement circuit are determined.
EFFECT: increasing the accuracy of determining the parameters of the substitution scheme in the operating mode.
1 cl, 2 dwg, 3 tbl
