A Traveling Wave Network Locating Method Based on Dynamic Virtual Fault
A network location and virtual fault point technology, applied in the field of traveling wave network location based on dynamic virtual faults, can solve problems such as excessive error in fault location
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[0070] 1. Analysis of the arrival time difference characteristics of fault traveling waves
[0071] by figure 1 The structure shown is taken as an example for analysis, and all three lines are connected to node a. After the transmission line fails, the initial traveling wave propagates along the shortest path to three measurement points b, c, d, respectively.
[0072] Suppose f in line ab 1 The fault occurs at 1 Time required for propagation to measurement points b, c, d for
[0073]
[0074] In the formula, v b , v c , v d Respectively represent the wave speed of the initial traveling wave of the fault propagating to the measurement points b, c, and d; Indicates the line length from the fault point to the measurement point. The traveling wave velocity can generally be regarded as a fixed value, so we can make v b =v c =v d =v. Then the time difference of the initial traveling wave of fault reaching each measurement point is
[0075]
[0076] Similarly,...
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