METHOD TO DETECT DISTANCE TO AREA OF DAMAGE ON POWER TRANSMISSION LINE Russian patent published in 2013 - IPC G01R31/08 

FIELD: electricity.

SUBSTANCE: currents and phase voltages are measured on the first and second ends of the line. Phase-to-phase currents and voltages are generated from measured currents and voltages. Emergency components of phase-to-phase currents are identified, as well as emergency components of phase-to-phase voltages. Moments of time t₁ and t₂ are fixed on the first and second ends of the line, for the time period, when a threshold value is exceeded by the sum of emergency components of phase-to-phase voltages and emergency components of appropriate phase-to-phase currents multiplied by a coefficient equal to an equivalent value of phase-to-phase wave resistance. Using the measured difference (t₁ -t₂), the distance to the damage area is calculated.

EFFECT: increased sensitivity and accuracy of damage area detection.

1 dwg