Method and device for detecting line flashover fault

A fault detection and line flashover technology, applied in fault location, testing dielectric strength, etc., can solve problems such as inability to unify and single monitoring method, and achieve the effect of reducing work equipment, improving work efficiency, and low operation and maintenance costs

Active Publication Date: 2014-02-05
STATE GRID CORP OF CHINA +1
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  • Abstract
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Problems solved by technology

The above methods are all for the measurement of wind deflection and insulation flashover respectively, and the monitoring method is relatively simple and cannot be unified

Method used

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  • Method and device for detecting line flashover fault
  • Method and device for detecting line flashover fault
  • Method and device for detecting line flashover fault

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Embodiment Construction

[0044] In order to make the purpose, technical solution and advantages of the patent of the present invention clearer, the patent of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0045] Since the discharge phenomenon occurs when the transmission line flashover occurs, various noises and pulse signals will be generated. The present invention determines whether the transmission line has a flashover fault by collecting and analyzing these noise signals and pulse signals.

[0046] The invention provides a line flashover fault detection method, the flow of which is as follows figure 1 shown, including:

[0047] Step S101, collecting noise signals on the lines around the tower;

[0048] Step S102, extracting noise features in the noise signal per unit time, and detecting whether a flashover fault occurs on the transmission line according to the noise features.

[0049] The specific implementation of the step S102 i...

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Abstract

The invention discloses a method and device for detecting a line flashover fault. The method for detecting the line flashover fault comprises the steps that noise signals on a line around a tower are collected, the noise feature of the noise signals in the unit time is extracted, and whether the flashover fault of a power transmission line happens or not is detected according to the noise feature. According to the method and device for detecting the line flashover fault, windage yaw flashover and insulator arc-over can be detected at the same time, and the number of working devices is a half of the number of working devices used in a normal measuring mode; due to the fact that the structure of a detection system based on the noise signals is simple, the operation cost of equipment and the maintenance cost of the equipment are low, and working efficiency of maintenance workers can be greatly improved.

Description

technical field [0001] The invention relates to a line detection technology, in particular to a line flashover fault detection method and device. Background technique [0002] On high-voltage lines, due to various reasons, such as the harsh outdoor environment, especially the existence of natural disasters such as strong winds, rain, snow, dust, and birds, it is easy to cause damage to wires and towers, and then cause various line failures. [0003] The more common line faults include wind deflection flashover and insulator flashover. [0004] Wind deflection flashover is mainly due to the strong wind state, the insulator string has a certain displacement and deflection relative to the tower, which reduces the air discharge gap between the wire and the tower and increases the wind deflection angle. When the distance cannot meet the insulation strength requirements , coupled with heavy rainfall or hail accompanied by strong winds, reduces the power frequency discharge voltag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08G01R31/12
Inventor 侯志文王启银王鹏孟智东马小源赵锐王旭李学勤
Owner STATE GRID CORP OF CHINA
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