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Overhead line lightning stroke broken line protection scheme generation method and device

A technology for lightning strike disconnection and overhead line, applied in the direction of instrument, data processing application, prediction, 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: 2020-03-17
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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  • Overhead line lightning stroke broken line protection scheme generation method and device
  • Overhead line lightning stroke broken line protection scheme generation method and device
  • Overhead line lightning stroke broken line protection scheme generation method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 As shown, a method for generating an overhead line lightning strike and disconnection protection scheme in this embodiment includes:

[0026] S101: Retrieving the distribution network topology and its associated equipment parameters and the number of users in the distribution network database, constructing a distribution network simulation model and performing induction lightning strike distribution line simulation, and obtaining simulated distribution lines in unprotected mode, The disconnection rate and the number of affected users under the lightning protection method and the alternating mode of no protection and lightning protection.

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

[0028] At present, the insulator string flashover criteria for overhead lines in my country mainly include the following types, namely the definition method, the intersecti...

Embodiment 2

[0082] Such as figure 2 As shown, a kind of overhead line lightning strike disconnection protection scheme generating device of this embodiment includes:

[0083] (1) Inductive lightning strike distribution line simulation module, which is used to retrieve the distribution network topology and its associated equipment parameters and number of users in the distribution network database, build a distribution network simulation model and perform induction lightning strike distribution line simulation , to obtain the disconnection rate and the number of affected users of the simulated distribution line in the unprotected mode, the lightning protection mode, and the alternating mode of no protection and lightning protection;

[0084] Among them, the disconnection rate is equal to the product of the total number of lightning strikes on the distribution line, the arc establishment rate and the probability that the lightning current exceeds the critical current for flashover, the tot...

Embodiment 3

[0118] This embodiment provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the following figure 1 The steps in the method for generating the lightning strike disconnection protection scheme for overhead lines are shown.

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Abstract

The invention provides an overhead line lightning stroke broken line protection scheme generation method and device. The method comprises the steps of constructing a power distribution network simulation model, carrying out the lightning stroke induction power distribution line simulation, and obtaining the line breakage rate and the number of influence users of a simulation power distribution line in a non-protection mode, a lightning conductor protection mode and a non-protection and lightning conductor protection alternating mode ; constructing a target function by using the minimum value of the average interruption frequency index, taking the condition that the total cost does not exceed a preset total investment amount as a constraint condition, solving an optimal protection mode of the corresponding distribution line by adopting a 0-1 planning method, and outputting an overhead line lightning stroke line breakage protection scheme; j=1, 2, 3; j=1 is a non-protection mode; j=2 isa lightning conductor protection mode; j=3 is a non-protection and lightning conductor alternate protection mode, wherein the average interruption frequency index of the power distribution line i under the jth protection mode is equal to the ratio of the product of the number of the users affected by the disconnection of the power distribution line i and the disconnection rate of the power distribution line i under the jth protection mode to the total number of the users.

Description

technical field [0001] The disclosure belongs to the field of comprehensive protection simulation for lightning strike and disconnection of overhead lines, and in particular relates to a method and device for generating a protection scheme for lightning strike and disconnection of overhead lines. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] Lightning breakage is an important cause of insulated conductor operation accidents. The principle of lightning disconnection is: when the lightning overvoltage causes the insulator to flash over and break down the insulating layer of the wire, the insulating layer that is broken down is in the shape of a pinhole, and the continuous power frequency short-circuit current arc is blocked by the surrounding insulation, and the arc root It can burn at the pinhole, so that the wire will be burnt neatly i...

Claims

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Application Information

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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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