A traveling wave location method for lines with upfc based on the distribution characteristics of fault traveling waves along the line
A technology of traveling wave distance measurement and distribution characteristics, which is applied to the fault location, fault detection according to the conductor type, and electrical measurement. It can solve the problems of not being able to obtain the fault location and destroying the uniformity of the impedance of the entire transmission line.
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[0103] Embodiment 1: with figure 1 Taking the transmission line shown as an example, a phase A metallic ground fault occurs at a distance of 30km from the measuring end M on the left side of the UPFC.
[0104] According to step 1 in the manual, the traveling wave data with a time window length of 1.5l / v is acquired at the measurement terminal M and the measurement terminal N respectively;
[0105] According to step 2, use the current traveling wave and wave impedance of the adjacent sound line to construct the voltage traveling wave to obtain u M = i k × Z c ;
[0106] According to step 3, calculate the distribution u of the voltage traveling wave and current traveling wave along the line x,s (x,t) and i x,s (x,t);
[0107] Calculate the forward traveling wave and reverse traveling wave u according to step 4 + x,s and u - x,s ;
[0108] According to step 5, calculate and extract the sudden change of forward traveling wave and reverse traveling wave with and ener...
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