METHOD OF LOCATION OF DEFECTIVE BUNCHES OF INSULATORS ON AIR LINES OF ELECTRIC TRANSMISSION OF HIGH VOLTAGE Russian patent published in 2018 - IPC G01R31/08 

FIELD: electricity.

SUBSTANCE: method of locating defective insulators is that two electromagnetic sensors and connected electronic oscilloscopes are rectilinearly moved at a distance from each other L_s along the route of the high voltage transmission line. Distance between sensors L_s are calculated by global GPS or GLONASS navigation systems. Using time synchronization receivers simultaneously and with the same speed of the horizontal sweep to electronic oscilloscopes write voltage waveform during the propagation time of electromagnetic pulse from the sensor to another τ_s=L_s/ν, where ν the speed of propagation of electromagnetic pulse. On each of the recorded oscillograms, the time of occurrence of voltage pulses is calculated Δt_i (_i=1… n, i - is the pulse number, n is the number of pulses on the first waveform) and Δt¹_j (j=1… m, j - is the pulse number, m is the number of pulses on the second oscillogram), the time of appearance of pulses on the first and second waveforms alternately are summed pairwise t_k=Δt_i+Δt¹_i (k=1…n⋅m). Of all times t_k choose that time t_γ, which is equal to the time τ_s, and the corresponding summands forming the sum t_γ, is denoted as Δt_A and Δt¹_B. Based on the known distance to the first electromagnetic sensor x_s1 and time Δt_A determine the distance to the location of the defective garland of insulators x_def by the expression: x_def=x_s1-Δt_Aν.

EFFECT: increasing the accuracy of location of the defective garland of insulators.

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