Single-phase-to-earth fault location method for double-circuit lines based on direct mining and direct jump communication mode
A single-phase ground fault, double-circuit line technology, applied to the fault location, measuring device, instrument, etc., can solve the problems of zero-sequence compensation coefficient influence, high sampling rate requirements, and no substantive application, so as to eliminate Effect of fault location accuracy, effect of high ranging accuracy
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[0013] The technical solution of the present invention will be further described in detail according to the accompanying drawings.
[0014] figure 1 It is a schematic diagram of a double-circuit power transmission system on the same pole applying the present invention. figure 1 CVT is a voltage transformer, and CT is a current transformer. In the smart substation, the SV network communication network is carried out on the sampling digital signal transmission channel. After the merging unit collects the AC analog output of the voltage transformer CVT and the current transformer CT in real time, the merging unit collects the collected voltage transformer CVT and current transformer. The AC analog output of the switch CT is converted into a sampled digital signal, which is transmitted to the switch through optical fiber communication, and then directly transmitted to the relay protection device through optical fiber communication.
[0015] A method for locating a single-phase g...
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