Resonant earthed system fault line selection method utilizing waveform time domain feature clustering
A technology of resonance grounding, system fault, applied in the direction of fault location etc.
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[0068] When a single-phase ground fault occurs in a resonant grounding system, the similarity between the transient zero-sequence current waveforms between non-fault lines after the fault is greater than the similarity between the fault line and the non-fault line. The present invention is based on the transient zero-sequence current waveform after the fault Based on the similarity principle, a new method of line selection for single-phase grounding fault in resonant grounding system is proposed using waveform time domain feature clustering.
[0069] In the present invention, the fault line selection method of the resonant grounding system using waveform time-domain feature clustering, such as Figure 12 shown, including the following steps:
[0070] Step 1: Decompose the histogram of the half-cycle transient zero-sequence current waveform of each line after a single-phase-to-ground fault in the resonant grounding system, and obtain a histogram that reflects the time-domain di...
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