METHOD OF DETERMINING VALUE OF INDUCED VOLTAGE ON OVERHEAD LINE WITH DOUBLE-CHAIN (MULTI-CHAIN) SUPPORTS (VERSIONS) Russian patent published in 2016 - IPC H02J3/00 

FIELD: electrical engineering.

SUBSTANCE: invention can be applied to electrical engineering. Method comprises, after switching off line, first at its both ends measuring induced voltage values, and subsequent measurement and control of induced voltage is performed at end on which induced voltage is greater, then measuring and recording value of induced voltage in each phase U_1i, where i denotes phases, that is, A, B Or C, and value of load current I₁ on parallel operating line. Upon change of load current said actions are repeated to obtain, respectively, U_2i, where i denotes phases, that is, A, B Or C, and value of load current I₂, further, at any moment in time, measuring current value of load current I on parallel operating line, which is fixed during first measurement, and value of induced voltage U_i in each phase, i = A, B, C, disconnected line is calculated by mathematical expression: U_i=(U_1i ^I2/U_2i ^I1)^1/(I2-I1)exp(Iln(lnU_1i-lnU_2i)/(I₁-I₂)), where U_1i, U_2i, i = A, B, C are values of previously measured induced voltage in three phases of disconnected line, V; I₁, I₂ are previously measured values of current load on parallel operating line, A; I is current value of load current on parallel operating line, A, if current value of induced voltage at any phase exceeds 25 V, crew on site is immediately notified.

EFFECT: technical result is improved accuracy and safety.

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