Power transmission line lightning stroke monitoring device and lightning protection level assessment method

A technology of transmission lines and monitoring devices, which is applied in the direction of measuring devices, fault locations, and measuring electrical variables, etc., can solve the problems of lack of lightning protection level evaluation methods, large investment costs, lack of economy and rationality, etc.

Inactive Publication Date: 2015-12-09
STATE GRID XINJIANG ELECTRIC POWER CO ECONOMIC TECH RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a lightning strike monitoring device for transmission lines and a method for evaluating lightning protection levels, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem of lack of equipment for monitoring directly through transmission lines and lightning protection lines in the prior art. Lightning protection level assessment method, and the existing implementation plan has a large investment cost, lack of economy and rationality

Method used

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  • Power transmission line lightning stroke monitoring device and lightning protection level assessment method
  • Power transmission line lightning stroke monitoring device and lightning protection level assessment method
  • Power transmission line lightning stroke monitoring device and lightning protection level assessment method

Examples

Experimental program
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Effect test

Embodiment 1

[0052] Embodiment one: as attached figure 1 , 3 , 5, and 6, the transmission line lightning monitoring device includes a data acquisition host 1 installed on the three-phase wire of the transmission line, a data acquisition extension 2, a server 3 and a monitoring center 4 installed on the transmission line tower; the data acquisition host 1 and the data acquisition extension 2 are connected through a wireless transmission module, the data acquisition host 1 is connected to the communication port of the server 3 through wireless communication, and the server 3 and the control center 4 realize data communication through the network; the data acquisition host 1 Comprising a sensor measurement unit 301, a data processing unit 302 and a wireless communication unit 303, the output end of the sensor measurement unit 301 is electrically connected to the input end of the data processing unit 302 through a wire, and the data processing unit 302 is connected to the wireless communicatio...

Embodiment 2

[0057] Embodiment two: as attached figure 1 , 8 , 9, 10, and 11, the lightning protection level evaluation method includes the following steps:

[0058] Step 1: The server obtains local meteorological information in real time according to the latitude and longitude information of the installation point of the data acquisition host, and sends it to the data acquisition host; the data acquisition host selects the working mode of the data acquisition extension according to the received weather information, according to If the local future weather is thunderstorm weather, send a wake-up command, and then go to step 2; if the local future weather is not thunderstorm weather, send a sleep command, and then go to step 3;

[0059] Step 2: The data acquisition extension receives the wake-up work mode control command, that is, selects the wake-up work mode, opens the lightning current high-speed acquisition channel of the lightning protection line, analyzes and processes the collected ...

Embodiment 3

[0076] Embodiment three: the present invention provides a method for locating the lightning point of a transmission line, as attached figure 2 As shown, let the length of the interval between two monitoring points be L, when lightning strikes the transmission line at point A between the two monitoring points, that is, point A is the lightning strike point, and the distance between point A and monitoring point 1 is L 1 , the distance between point A and monitoring point 2 is L 2 , the time from the lightning strike point to monitoring point 1 and monitoring point 2 to monitor the traveling wave current from the GPS information at the time of lightning current occurrence is t 1 , t 2 , the propagation speed of the lightning wave in the line is the speed of light V, then the distance between the lightning point and the monitoring point 1 and the distance between the lightning point and the monitoring point 2 can be obtained as follows:

[0077] (1)

[0078] (2).

[0079]...

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Abstract

The invention relates to the technical field of power transmission line lightning stroke monitoring and lightning protection level assessment, especially a power transmission line lightning stroke monitoring device and lightning protection level assessment method. The device comprises a data collection host, a data collection extension unit, a server, and a monitoring center. The data collection host collects a lightning current passing through a power transmission line when lightning stroke happens to the power transmission line, and carries out data interaction with the data collection extension set. The data collection extension set collects the lightning current passing through a lightning conductor when lightning stroke happens to the lightning conductor, and carries out data interaction with the data collection host. The monitoring center achieves the remote access to the server through the Internet, so as to obtain the analysis result of the lightning current information of the power transmission line from the server. The device can effectively guide the lightning protection construction of a conventional line, enables lightning protection to be concentrated on a line weak link, improves the lightning resistance performance of the whole line, improves the efficiency of accident inspection, guarantees the safe and stable operation of the power transmission line, and effectively improves the power supply reliability of a power system.

Description

technical field [0001] The invention relates to the technical field of lightning strike monitoring and lightning protection level assessment of transmission lines, and relates to a lightning strike monitoring device for transmission lines and a lightning protection level assessment method. Background technique [0002] Existing lightning accidents account for a large proportion of transmission line faults. In order to reduce lightning accidents, the lightning protection design of transmission lines often adopts lightning protection measures such as installing lightning arresters, reducing grounding resistance, and erecting lightning protection lines. Evaluating the lightning protection level of transmission lines is an important technical means to guide the lightning protection design of transmission lines and the lightning protection measures of transmission lines. [0003] At present, in the evaluation method of the lightning protection level of existing transmission lines...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08G01R19/165G08C17/02
Inventor 李昌陵赵学花何琳贾政豪刘璐
Owner STATE GRID XINJIANG ELECTRIC POWER CO ECONOMIC TECH RES INST
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