FIELD: physics.
SUBSTANCE: in method arrays of instantaneous value of inlet and outlet current and voltage are registered for one and the same moments of time brought to the primary circuit, then array of instantaneous values of magnetisation current is determined, instantaneous values of voltage drop are measured in transformer windings, as well as actual values of output current and magnetisation current, value of active magnet losses in transformer and active losses in transformer windings, reactive power of transformer magnetisation and total power of transformer windings scattering inductance. active resistances of transverse and longitudinal branches of L-shaped equivalent circuit, inductive resistance of transverse and longitudinal branches of L-shaped equivalent circuit. In the second version of method, after determination of actual value of magnetisation current, numerical differentiation of reduced output current instantaneous values array is done, and array of instantaneous values of output current time derivative is formed, then parameters of equivalent circuit are calculated.
EFFECT: realises measurement of transformer L-shaped equivalent circuit parametres in working mode without its shutdown, transformer has no unloaded winding.
2 cl, 2 tbl, 3 dwg
