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Single-phase earth fault line selection device in neutral point ungrounded system

A single-phase ground fault, neutral point ungrounded technology, applied in transmission systems, measurement devices, digital transmission systems, etc., can solve the problems of difficult to locate fault locations, large dispersion, and many maintenance personnel, and achieve the process of detection and positioning. convenient effects

Pending Publication Date: 2020-09-04
XIANGYANG KENENG ELECTROMECHANICAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the small and large dispersion of the zero-sequence current, it is difficult for the existing line selection device to quickly and accurately locate the fault location, and maintenance personnel still need to spend more time on troubleshooting when a fault occurs

Method used

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  • Single-phase earth fault line selection device in neutral point ungrounded system
  • Single-phase earth fault line selection device in neutral point ungrounded system
  • Single-phase earth fault line selection device in neutral point ungrounded system

Examples

Experimental program
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Effect test

Embodiment

[0037] A single-phase ground fault line selection device in a neutral point ungrounded system, such as Figure 1 to Figure 3 As shown, it includes: several acquisition units 1 connected to the power grid for collecting detection data, and the acquisition unit 1 includes: several current transformers 11 and branch devices 12 connected with the current transformers 11; Unit 1 is connected to line selection processing unit 2.

[0038] Specifically, the line selection processing unit 2 includes: a main control processing chip 21; a communication interface module 22 connected with the main control processing chip 21, and the main control processing unit is connected with some acquisition units 1 through the communication interface module 22; The memory module 23 that chip 21 is connected, and memory module 23 is used for storing the address parameter and detection data of each collection unit 1 and current transformer 11; The signal processing module 24 that is connected with main ...

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Abstract

The invention relates to a single-phase earth fault line selection device in a neutral point ungrounded system, and the device comprises a plurality of collection units which are connected with a power grid and are used for collecting detection data, wherein each collection unit comprises a plurality of current transformers and a splitter; a plurality of line selection processing units connected with the collection units, wherein each line selection processing unit comprises a main control processing chip, a communication interface module, a storage module, a signal processing module; and a WEB interaction module connected with a cloud server and an information sending module, wherein geographic information data of each collection unit and each current transformer is stored in the cloud server, and when the WEB interaction module receives the alarm data, alarm information containing the geographic information data is generated. Because the geographic information data can guide the specific position of the fault, the maintenance personnel can quickly determine the position of the fault according to the alarm information, and the detection and positioning process is more convenient.

Description

technical field [0001] The invention relates to the technical field of electric power detection, in particular to a single-phase ground fault line selection device in a neutral point ungrounded system. Background technique [0002] my country's 10-35KV medium-voltage system is the main component of the power grid. It is generally composed of 10KV and 35KV buses of 35KV substations and 110KV substations. It mainly supplies urban and rural distribution networks. In this way, when a single-phase ground fault occurs in this system, it does not destroy the symmetry of the system voltage, does not cause great harm to the power supply equipment, and allows the faulty line to continue to run for a period of time without affecting the normal power supply. If it is not dealt with in time, due to the increase of the voltage of the two phases of the non-faulty phase, the weak link of the insulation may be broken down and develop into a phase-to-phase short circuit, which will expand the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04L29/08G01R31/52G01R19/165
CPCH04L41/0677H04L41/0253H04L67/02G01R19/16571G01R31/52H04L67/52
Inventor 张浩杨艳清
Owner XIANGYANG KENENG ELECTROMECHANICAL EQUIP
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