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A lightning strike overvoltage fault location method

A technology of lightning overvoltage and positioning method, which is applied in the direction of fault location, fault detection according to conductor type, and electrical measurement. The effect of high precision and avoiding errors

Active Publication Date: 2022-08-09
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] This application provides a method for locating lightning overvoltage fault points to solve the problems of low accuracy and affecting the efficiency of maintenance operations in the current lightning overvoltage fault point locating method

Method used

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  • A lightning strike overvoltage fault location method
  • A lightning strike overvoltage fault location method
  • A lightning strike overvoltage fault location method

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Embodiment Construction

[0043] Embodiments will be described in detail below, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following examples are not intended to represent all implementations consistent with this application. are merely exemplary of systems and methods consistent with some aspects of this application as recited in the claims.

[0044] see figure 1 , which is a schematic diagram of the application scenario of the embodiment of the present application; combined with figure 2, a schematic diagram of the principle of the embodiment of the present application; and in combination with image 3 , is a flowchart of an embodiment of the present application, which is convenient for understanding the technical solutions of the following embodiments of the present application. ...

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Abstract

The present application belongs to the technical field of lightning location of power transmission and distribution lines, and in particular relates to a lightning strike overvoltage fault location method. In the power system, there is a problem of low measurement accuracy in the method of locating faults in transmission and distribution lines after being struck by lightning. The present application provides a method for locating lightning strike overvoltage faults, which includes monitoring the line state with a number of distributed voltage monitoring sensors, and when the sensors determine that lightning strike overvoltage occurs, uploading the monitored voltage characteristic data to a background positioning host, and the background host The collected data is extracted and analyzed, and the position of the lightning strike point of the line is determined by using the phase transfer characteristics of the first overvoltage signal generated when the line is struck by lightning relative to the system power frequency voltage per cycle. The invention realizes the accurate positioning of the lightning strike position of the transmission and distribution line by combining the pulse signal injection and the phase change characteristics of the lightning strike overvoltage.

Description

technical field [0001] The present application relates to the technical field of lightning location of power transmission and distribution lines, in particular to a lightning strike overvoltage fault location method. Background technique [0002] In the power system, transmission and distribution lines, as an important part of the power grid system, have received more and more attention and attention in recent years with the development of smart grid construction. The installation of various condition monitoring equipment on transmission line towers is the basic work for the construction of intelligent transmission lines. At present, the construction of power grids in various places has also taken it as the main development direction. [0003] Lightning is an important factor endangering the safety of power systems. Lightning is extremely harmful to the safe operation of transmission lines, often causing insulator flashover accidents. Lightning strikes on transmission and di...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08
CPCG01R31/085G01R31/088Y04S10/52
Inventor 刘红文张恭源赵现平柴晨超张春丽张扬
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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