FIELD: technological processes.
SUBSTANCE: method of determination of current parameters of power line for arrangement of its U-like adaptive model consists in measurement of instant values of current and voltage signals. Arrays of instant values of current and voltage readings in the beginning of 
, 
and in the end of power line 
, 
, which are received in one and the same moments of time tj=t1, t2,..., tN, with pitch of discretisation 
where T - period of current/voltage signal; N - number of readings in period T, are transferred to the line in its beginning through communication channel. By measured arrays pairs of digital readings of currents and voltages are stored as present, difference of present digital readings of currents and voltages is determined, difference of currents signals values are changed proportionally to coefficient k=0; 0,1...1 for determination of currents values distribution in transverse resistances of one and the other transverse branches. Then current is defined in longitudinal branch: either as difference of values of current in the beginning of the line and current in one transverse branch, or as sum of current in the end of the line and current of other transverse branch. Then value of active power loss is determined in active resistance of two transverse branches of the power line, simultaneously the active value of current signal in it is defined as well as value of reactive power loss in reactive resistance of this branch. Then value of active and reactive resistances of this transverse branch of power line is determined as field of possible solutions depending on k. Then value of active power loss in active resistance of power line longitudinal branch is determined, simultaneously the active value of current signal in it is defined as well as value of reactive power loss in reactive resistance of this branch. Then value of active and reactive resistances of this transverse branch of power line is determined as field of possible solutions depending on k. Then by received values of resistances of longitudinal and transverse branches for under-load mode/idle run mode they determine value of resistance of longitudinal and transverse branches of U-like adaptive model as equation of total resistances of one and the other transverse branches: z0 ' = z0 ". In method of power line current parameters determination by second variant value of resistance of longitudinal and transverse branches of U-like adaptive model is determined: either as equation of total resistance, of first transverse branch and total resistance of second transverse branch of the first and second modes, or as equation of total resistance of second transverse branch and total resistance of first transverse branch of the first and second modes: either (z0 ')P1 = (z0 ") P2 or (z0 ") P1 = (z0 ')P2.
EFFECT: simplification, improvement of accuracy and information density.
2 cl, 5 dwg, 4 tbl
