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Intermittent arc fault detection method and related device

A technology of arc fault and detection method, which is applied in the field of distribution network, can solve the problem of low detection accuracy, achieve strong self-learning ability, improve fault detection results, and improve anti-interference and accuracy

Pending Publication Date: 2021-10-01
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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Problems solved by technology

[0004] The application provides an intermittent arc fault detection method and related devices, which are used to improve the technical problem of low detection accuracy existing in the existing intermittent arc fault detection method

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  • Intermittent arc fault detection method and related device
  • Intermittent arc fault detection method and related device
  • Intermittent arc fault detection method and related device

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Embodiment Construction

[0056] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0057] For ease of understanding, see figure 1 , an embodiment of an intermittent arc fault detection method provided by the present application, including:

[0058] Step 101, after obtaining the zero-sequence current waveform to be detected in the distribution network, divide the zero-sequence current waveform to be detected into several waveform segments accordi...

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Abstract

The invention discloses an intermittent arc fault detection method and a related device. The method comprises the steps: segmenting a to-be-detected zero-sequence current waveform into a plurality of waveform segments, and carrying out preprocessing on the waveform segments to obtain a plurality of test samples; inputting the test samples into an intermittent arc fault detection model to obtain fault detection results; sequentially judging whether the current test sample has an intermittent arc fault according to the fault detection result of each test sample, if not, setting a slave factor SF to be equal to SF + 1, and if so, setting a main factor PF to be equal to PF + 1 and setting SF to be 0; when the PF is greater than a first preset threshold value and the SF is greater than a second preset threshold value, judging that the short-time intermittent arc fault occurs in the power distribution network; when the PF is greater than a third preset threshold value, judging that the power distribution network has a long-time intermittent arc fault; when the PF is smaller than a fourth preset threshold value and the SF is larger than a second preset threshold value, judging that the intermittent arc fault does not occur in the power distribution network. The technical problem that an existing intermittent arc fault detection method is not high in detection precision is solved.

Description

technical field [0001] The present application relates to the field of distribution network technology, in particular to a method for detecting an intermittent arc fault and a related device. Background technique [0002] In the ground fault event of resonant grounding system, single-phase ground fault has a high probability of occurrence, accounting for the vast majority of the total number of faults. In order to ensure the safety, stability and reliability of the distribution network, it is necessary to detect in time and effectively investigate the single-phase ground fault before it actually occurs. The development process of most single-phase ground faults is from initial intermittent arc faults (Intermittent Arc Faults, IAF) to gradual transition to stable arc ground faults, and finally to single-phase permanent ground faults. Therefore, the effective detection of intermittent arc faults is conducive to the early detection of hidden safety hazards, so that the faulty ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/18G06F30/27G06N3/04G06N3/08G06F113/04
CPCG06F30/18G06F30/27G06N3/08G06F2113/04G06N3/045Y04S10/52
Inventor 白浩郑风雷袁智勇陈庆祺雷金勇刘贯科余文辉庄清涛顾衍璋江华吴争荣罗旭军周长城潘姝慧
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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