Power distribution network single-phase earth fault sensing method based on transient state and steady state of phase current
A single-phase ground fault, distribution network technology, applied in the fault location, fault detection by conductor type, short-circuit test, etc., can solve the problem of complex fault conditions in the distribution network, reduce secondary cable laying, and locate accuracy. High, reliability-enhancing effect
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[0170] like Image 6 as shown, Image 6 It is the structural diagram of the simulation model of the neutral point grounding system through the arc suppression coil on the physical simulation platform.
[0171] Image 6 Lines 1 and 3 are normal lines, and line 2 is a faulty line. Install detection devices at the head ends of lines 1 and 3 respectively. Line 2 is divided into two sections, front and rear, respectively.
[0172] According to the present invention, a physical simulation platform is used to simulate high-resistance grounding and arc grounding to perform fault sensing technology simulation verification, wherein high-resistance grounding is a special case of resistance grounding, and it is a case where line selection is difficult.
[0173]For the single-phase ground fault of the neutral point through the arc suppressing coil grounding system or the neutral point ungrounded system, a single-phase ground fault sensing method of the distribution network based on the p...
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