METHOD FOR AUTOMATIC RE-CONNECTION OF CABLE-OVERHEAD POWER TRANSMISSION LINE Russian patent published in 2020 - IPC H02H3/06 

FIELD: electrical engineering.

SUBSTANCE: according to the method, in case of damage to the cable-overhead power transmission line (OHPTL), electromagnetic waves propagating from the damage point to the OHPTL ends are fixed using the OHPTL damage determination units, determining the OHPTL damage on the fixed electromagnetic waves, calculating the distance to the OHPTL damage point, outputting from the information processing unit a signal on the possibility of the cable OHPTL reconnection, as well as information on design distance to point of cable OHPTL damage, performing preliminary simulation of OHPTL and realizing a recognition procedure in an information processing unit, consisting in determining a damaged OHPTL cable or air section, as well as distances to the point of damage, according to the recognition results, a prohibiting signal for re-connection of the cable OHPTL is issued from the information processing unit, if damage occurred at least on one of OHPTL cable sections. At that, amplitudes of the first current and voltage pulses of electromagnetic waves arriving at OHPTL ends are fixed by means of units of wave determination of OHPTL damage, forming the ratio of amplitudes of the first current and voltage pulses of electromagnetic waves arriving at OHPTL ends, performing the procedure for recognition of the damaged section and determining the point of damage of the cable OHPTL in relation to the amplitude of the first current and voltage pulses of the electromagnetic waves arriving at OHPTL ends, recognition of the damaged portion and determination of the point of damage of the cable OHPTL is realized using simulation results which are generated in the form of a relationship between the ratios of the amplitudes of the first current pulses and the voltage of electromagnetic waves arriving at OHPTL ends from OHPTL length, preliminary recording of simulation results into information processing units.

EFFECT: high noise-immunity of the method of automatic reclosure of cable OHPTL and its simplification.

1 cl, 5 dwg