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A method and device for generating an overhead line lightning strike and disconnection protection scheme

A lightning strike disconnection and overhead line technology, which is applied in data processing applications, predictions, instruments, etc., can solve the problem of not being able to obtain the optimal solution for lightning strike disconnection protection of overhead lines

Active Publication Date: 2022-05-31
BINZHOU POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The inventors found that the lightning protection scheme for overhead lines needs to be adjusted by experienced maintenance personnel in practical applications, so that the optimal scheme for protection against lightning strikes for overhead lines cannot be obtained

Method used

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  • A method and device for generating an overhead line lightning strike and disconnection protection scheme
  • A method and device for generating an overhead line lightning strike and disconnection protection scheme
  • A method and device for generating an overhead line lightning strike and disconnection protection scheme

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Experimental program
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Effect test

Embodiment 1

[0027] Specifically, the distribution network simulation model includes an insulator flashover model, an overhead line model and a tower model.

[0031] Take 0.84 μh / m for the inductance of the reinforced concrete pole without the pull wire, and the inductance of the reinforced concrete pole with the pull wire is 0.42 μh /

[0035] The magnitude of the induced overvoltage on the line can be estimated by equation (1).

[0036]

[0044] 4) The overhead line is an ideal conductor without loss.

[0046]

[0049] After the power distribution line is subjected to lightning strikes and causes insulators to impact flashover, not all of them will cause disconnection. Due to shock flashover

[0052] Among them, N is the total number of lightning strikes on the distribution line.

[0054] According to the breakage rate mathematical model, the breakage mechanism is revealed, and the key factors affecting the breakage rate are given.

[0057]

[0059] The System Average Interruption Frequency I...

Embodiment 2

[0085] The distribution network simulation model includes an insulator flashover model, an overhead line model, and a tower model.

[0087] The magnitude of the induced overvoltage on the line can be estimated by equation (1).

[0088]

[0095] 4) The overhead line is an ideal conductor without loss.

[0097]

[0100] After the power distribution line is struck by lightning and causes the insulator to strike and flashover, not all of them will cause disconnection. Due to shock flashover

[0103] Among them, N is the total number of lightning strikes on the distribution line.

[0105] According to the mathematical model of the disconnection rate, the disconnection mechanism is revealed, and the key factors affecting the disconnection rate are given.

[0108]

[0109] In the actual lightning protection renovation project, the electric power department often hopes to obtain a good lightning resistance performance on the premise of ensuring the line.

[0110] The System Average Interr...

Embodiment 3

[0118] This embodiment provides a computer-readable storage medium on which a computer program is stored, and the program is processed

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Abstract

The disclosure provides a method and a device for generating an overhead line lightning strike and disconnection protection scheme. Among them, the method includes building a distribution network simulation model and performing induction lightning strike distribution line simulation, and obtaining the disconnection rate of the simulated distribution line in the unprotected mode, the lightning protection line protection mode, and the non-protection and lightning protection line protection alternate mode. and the number of affected users; the objective function is constructed with the minimum value of the average outage frequency index, the total cost does not exceed the preset total investment amount as the constraint condition, and the optimal protection mode of the corresponding distribution line is obtained by using the 0-1 planning method, and the overhead line is output Lightning disconnection protection scheme; j = 1, 2, 3; j = 1 is no protection mode; j = 2 is lightning protection line protection mode; j = 3 is no protection and lightning protection line alternate protection mode; distribution line i chooses the first The average outage frequency index under the protection mode j is equal to the ratio of the product of the number of users affected by the disconnection of the distribution line i and the disconnection rate of the distribution line i choosing the j protection mode to the total number of users.

Description

A method and device for generating a lightning strike and disconnection protection scheme for overhead lines technical field The present disclosure belongs to the field of comprehensive protection simulation of overhead line lightning strike and disconnection, and in particular relates to a kind of overhead line lightning strike and disconnection A method and device for generating a line protection scheme. Background technique The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art information technique. [0003] Lightning strike disconnection is an important reason for the running accident of insulated conductors. The principle of lightning strike disconnection is: lightning overvoltage When the insulator flashover is caused and the wire insulation layer is broken down, the broken insulation layer is in the shape of a pinhole, and the continuous power frequency short-circuit cu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/04G06Q10/06G06Q50/06
CPCG06Q10/04G06Q10/067G06Q50/06Y04S10/50
Inventor 王晖张凯冯辉刘爱民刘延清
Owner BINZHOU POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER
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