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Power distribution network high-resistance grounding fault identification method and device, terminal and medium

A technology of high-resistance ground fault and identification method, which is applied in the directions of measuring devices, measuring electricity, measuring electrical variables, etc.

Pending Publication Date: 2022-02-25
GUANGDONG POWER GRID CO LTD DONGGUAN POWER SUPPLY BUREAU +1
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Problems solved by technology

[0004] This application provides a method, device, terminal and medium for identifying high-resistance ground faults in distribution networks, which are used to solve the technical problem of high-resistance ground fault identification in the prior art that is difficult

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  • Power distribution network high-resistance grounding fault identification method and device, terminal and medium
  • Power distribution network high-resistance grounding fault identification method and device, terminal and medium
  • Power distribution network high-resistance grounding fault identification method and device, terminal and medium

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Embodiment Construction

[0045] The embodiments of the present application provide a method, device, terminal and medium for identifying a high-resistance grounding fault in a power distribution network, which are used to solve the technical problem that high-resistance grounding fault identification is difficult in the prior art.

[0046] In order to make the purpose, features and advantages of the invention of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the following The described embodiments are only some, but not all, embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0047] se...

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Abstract

The invention discloses a power distribution network high-resistance grounding fault identification method and device, a terminal and a medium. The method comprises the steps: determining the number of target decomposition layers through wavelet transformation according to the sampling frequency of zero-sequence current data in combination with the corresponding relation between preset sampling frequency and the number of target decomposition layers. According to the invention, feature extraction and feature screening are achieved, screened fault features are classified through a semi-supervised learning algorithm classifier, high-resistance grounding faults and common disturbance events can be more reliably distinguished under the condition of a small number of labeled training samples, and a certain anti-noise capability is achieved, so that effective recognition of the high-resistance grounding faults is achieved, and the technical problem of high difficulty in high-resistance grounding fault identification in the prior art is solved.

Description

technical field [0001] The present application relates to the technical field of distribution network fault identification, and in particular, to a method, device, terminal and medium for identifying a high-resistance grounding fault in a distribution network. Background technique [0002] With the development of the urban distribution network, the distribution lines are becoming more and more complex and the probability of failure increases. High impedance fault (HIF) is a type of single-phase ground fault that is difficult to detect in the distribution network. Due to the large resistance value of the transition resistance in the early stage of the fault, the fault characteristics are weak, and it is often impossible to trigger the traditional microcomputer protection device. Start threshold. Although the high-resistance grounding fault has a small fault current and is less harmful to equipment, if such a fault exists for a long time, it will increase the risk of forest f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/52G01R31/58
CPCG01R31/52G01R31/58
Inventor 陈盛燃白浩邵向潮袁智勇陈炽伟雷金勇江华潘姝慧刘贯科郭琦张娟吴争荣王锦堂孙方坤李旭
Owner GUANGDONG POWER GRID CO LTD DONGGUAN POWER SUPPLY BUREAU
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