On-line distance measurement method of protection fault information management system
A technology of management system and distance measurement method, which is applied to fault location, fault detection according to conductor type, etc., can solve the problem of low timeliness of fault recording data, and achieve the effect of improving timeliness
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[0023] Example 1
[0024] Such as figure 1 As shown, an online ranging method for protecting a fault information management system includes the following steps:
[0025] S1. After the power grid fails, determine the faulty line according to the remote signal displacement, SOE and protection action signals;
[0026] S2. Summon the recording file of the designated wave recorder of the plant on both sides of the fault line;
[0027] S3. Determine the specific fault time and the corresponding faulty equipment according to the phase current mutation recorded in the wave file, and further determine the three-phase voltage, zero sequence voltage, three-phase current and zero sequence current of the faulty equipment, totaling 8 analog channels ;
[0028] S4. Based on the determined fault time and 8 analog channels, the differential Fourier series algorithm is applied to the discrete sampling points of one cycle before the fault and one cycle after the fault to calculate the three-phase voltage...
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