Lightning overvoltage fault positioning method

A lightning strike overvoltage and positioning method technology, which is applied in the direction of fault location, fault detection according to conductor type, and electrical measurement, can solve the problems of affecting the efficiency of maintenance operations and low precision, and achieve the improvement of power supply reliability and intelligent level, positioning The effect of high precision and fast response

Active Publication Date: 2020-06-05
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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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

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  • Lightning overvoltage fault positioning method
  • Lightning overvoltage fault positioning method
  • Lightning overvoltage fault positioning method

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Embodiment Construction

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

[0044] see figure 1 , 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 application; and a combination of image 3 , is a flowchart of the embodiment of the present application, which facilitates understanding of the technical solutions of the following embodiments of the present application.

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Abstract

The invention belongs to the technical field of lightning positioning of power transmission and distribution lines of power systems, and particularly relates to a lightning overvoltage fault positioning method. In an electric power system, a positioning method for generating a fault after a power transmission and distribution line is struck by lightning has the problem of low measurement precision. According to the lightning overvoltage fault positioning method, the method comprises the steps that: a plurality of distributed voltage monitoring sensors are used for monitoring a line state; whenthe sensors judge that lightning overvoltage occurs, the monitored voltage characteristic data are uploaded to a background positioning host, the acquired data are extracted and analyzed by the background host, and the lightning strike point position of the line is judged by utilizing the phase transmission characteristic of a first overvoltage signal generated when the line is subjected to lightning strike relative to the power frequency voltage of the system in each period. The lightning stroke position of the power transmission and distribution line is accurately positioned by combining pulse signal injection and lightning stroke overvoltage phase transmission and transformation characteristics.

Description

technical field [0001] The present application relates to the technical field of lightning location for power transmission and distribution lines in electric power systems, and in particular to a lightning 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. Installing various condition monitoring equipment on transmission line towers is the basic work of building intelligent transmission lines. At present, the construction of power grids in various places also regards it as the main development direction. [0003] Lightning is an important factor that endangers 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 an...

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Application Information

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Patent Type & Authority Applications(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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