Method for acquiring zero-sequence current transient starting point during single-phase earth fault of power distribution network
A single-phase ground fault and zero-sequence current technology, which is applied to the fault location, detects faults according to conductor types, and measures electricity. It can solve problems such as unstable load fluctuations, difficult first half-wave data, complex structures and load conditions, etc. , to achieve the effect of reducing the error probability and improving the accuracy of acquisition
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[0027] The present invention will be further described below in conjunction with accompanying drawing:
[0028] Such as Figure 1-6 As shown, the method for obtaining the zero-sequence current transient starting point in the case of a single-phase-to-ground fault in the distribution network in this embodiment includes the following steps:
[0029] Such as Figure 4 As shown, the solution realization system of the present invention is composed of a PMU, a fault indicator of a transient recording type, and a master station of a distribution network. Among them, the PMU is installed at the outlet end of the 10KV distribution line substation, and the internal integrated GPS module can obtain the reference time, and the zero-sequence voltage of the line can be collected through an external zero-sequence PT; The wave-recording type fault indicator is composed of a collection unit and three acquisition units. The collection unit integrates a GPS module. The collection unit and the ...
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