Automatic matching-based power transmission line fault cause identification method

A transmission line and fault cause technology is applied in the field of transmission line fault cause identification based on automatic matching. , Reduce the time of outage and improve the reliability of power supply

Inactive Publication Date: 2017-10-24
ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] On the one hand, the shielding is greatly affected by the lightning current amplitude and the protection angle of the lightning conductor, and the counterattack is greatly affected by the lightning current amplitude, the maximum steepness of the lightning current and the grounding grid resistance of the tower.
If it is impossible to determine whether the specific cause of the lightning strike is shielding or counterattack, it will be difficult to guide transmission line ...

Method used

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  • Automatic matching-based power transmission line fault cause identification method

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Embodiment 1

[0039] Taking the 110kV permanent pull-in line as an example, the description is as follows:

[0040] First, the trip data is retrieved.

[0041] Access the trip line name and trip time in real time, and analyze the information as follows:

[0042] Trip line name: Yongqian

[0043] Voltage level: 110kV

[0044] Trip time: 2014-05-30 18:06:00.

[0045] Secondly, first call the lightning location system line information interface, and match the trip line as follows:

[0046] Numbering

Voltage

line name

Number of towers

length

1038

110

forever match

28

6865

[0047] Then query the detailed lightning information and lightning resistance level of "Yongqianxian" within 1 minute before and after the time point of "2014-05-30 18:06:00", within a radius of one kilometer of the corridor, and determine the fault point and lightning strike type.

[0048] Finally, diagnose the results and present them.

[0049] When there is a lack of ...

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Abstract

The invention discloses an automatic matching-based power transmission line fault cause identification method. According to the method, line tripping and log book information is connected into and matched in a lightning locating system, so that the location of a lightning strike fault is judged; and the shielding failure and back striking lightning withstand levels of towers at each stage of a power transmission line are compared with the amplitude of lightning current, so that the nature of the lightning strike fault can be determined. With the method of the invention adopted, the tripping lightning fault of the power transmission line can be automatically identified, a technical basis is provided for the auxiliary decision-making of the post-disaster rapid processing of the lightning strike tripping fault, the application limitations of a method according to which the type of a fault can be diagnosed and the location of the fault can be determined only after line inspection is performed to search a fault point after a lightning strike fault occurs can be eliminated, the repair time and power resuming time of the power transmission line can be greatly shortened, and a large quantity of labor, material and time costs for detecting the fault can be saved.

Description

technical field [0001] The invention belongs to the technical field of state monitoring and fault diagnosis of electric equipment, and in particular relates to an automatic matching-based identification method for transmission line fault causes. Background technique [0002] The tripping of transmission lines is an important reason that affects the reliability of power transmission and transformation facilities, and the number of trips caused by lightning strikes accounts for more than 65% of the total number of trips of transmission lines with voltage levels of 110kV and above. At present, all provincial power grids have passed the lightning locating system (LLS) to monitor and store lightning information within the area, and use this to judge and find lightning fault points. The tripping of transmission lines directly affects the reliable supply of electricity that is related to the national economy and people's livelihood. In addition, lightning faults on transmission li...

Claims

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Application Information

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IPC IPC(8): G01R31/08G01R31/02G01R19/165
CPCG01R31/085G01R19/16538
Inventor 张炜王乐邬蓉蓉郭丽娟朱时阳蒲金雨蒙国斌
Owner ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
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