Fault online positioning method and device for cable overhead mixed line
A technology of hybrid line and positioning method, which is applied in the direction of fault location, satellite radio beacon positioning system, measuring device, etc., can solve the problem of inability to locate cable overhead mixed line faults, shorten fault finding time, reduce power failure loss, improve The effect of electricity reliability and efficiency
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[0039] This embodiment provides an online fault location method for cable overhead hybrid lines, including the following steps:
[0040] Set up detection points in each terminal station and intermediate transfer station in the hybrid line, and obtain traveling wave voltage signals, traveling wave current signals and power frequency current signals in each detection point. Hybrid lines include cable lines and overhead lines ;
[0041] According to the change of the power frequency current signal in the whole hybrid line, determine the preliminary fault location interval, and judge whether it belongs to the cable line fault or the overhead line fault; the preliminary fault location interval is between the adjacent terminal station and the intermediate transfer station in the hybrid line a line;
[0042]If it is a cable line fault, the location of the fault point is determined by the traveling wave voltage signal at the detection point near the preliminary fault location section...
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