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Power distribution network direct lightning and inductive lightning identification method based on lightning arrester action current frequency band analysis

A technology of operating current and frequency band analysis, applied in the fields of instruments, electrical digital data processing, special data processing applications, etc., can solve the problems of waste of resources, no separate protection, failure of protection, etc., and achieve the effect of reducing damage

Pending Publication Date: 2020-12-11
DALI POWER SUPPLY BUREAU YUNNAN POWER GRID
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no separate protection against the respective characteristics of direct lightning overvoltage and induced lightning overvoltage, and failure to distinguish between the two types of lightning overvoltage will not only cause waste of resources, but also cause protection failure due to wrong lightning protection objects, resulting in reduced reliability of distribution network power supply Phenomenon

Method used

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  • Power distribution network direct lightning and inductive lightning identification method based on lightning arrester action current frequency band analysis
  • Power distribution network direct lightning and inductive lightning identification method based on lightning arrester action current frequency band analysis
  • Power distribution network direct lightning and inductive lightning identification method based on lightning arrester action current frequency band analysis

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Embodiment 1

[0036] Embodiment 1: A method for identifying direct lightning strikes and induced lightning strikes in a distribution network based on the analysis of the operating current frequency band of an arrester, comprising the following steps:

[0037] Step1. Use ATP-EMTP to build figure 1 In the 110kV / 10kV distribution network simulation model shown, there are 6 outgoing lines in the 110kV / 10kV substation. The feeders L1, L2, L4, and L6 are overhead lines, and the feeders L3 and L5 are pure cable lines. Determine the model of the overhead line , the model of the overhead line adopts the JMarti model, and determines the model of the insulator and the lightning arrester;

[0038] Step2. Construct the direct lightning strike and induction lightning model of 10kV distribution line, use the HEIDLER function to represent the lightning current, and act on the A phase of the transmission line, and realize the induction lightning model by calling the IDNUS induction overvoltage module progra...

Embodiment 2

[0051] Embodiment 2: A method for identifying direct lightning strikes and induced lightning strikes in a distribution network based on the analysis of the operating current frequency band of an arrester, comprising the following steps:

[0052] Step1. Use ATP-EMTP to build figure 1 In the 110kV / 10kV distribution network simulation model shown, there are 6 outgoing lines in the 110kV / 10kV substation. The feeders L1, L2, L4, and L6 are overhead lines, and the feeders L3 and L5 are pure cable lines. Determine the model of the overhead line , the model of the overhead line adopts the JMarti model, and determines the model of the insulator and the lightning arrester;

[0053] Step2. Construct the direct lightning strike and induction lightning model of 10kV distribution line, use the HEIDLER function to represent the lightning current, and act on the A phase of the transmission line, and realize the induction lightning model by calling the IDNUS induction overvoltage module progra...

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Abstract

The invention relates to a power distribution network direct lightning and inductive lightning identification method based on lightning arrester action current frequency band analysis, and belongs tothe technical field of power system relay protection. A 10kV power distribution network inductive lightning and direct lightning simulation platform is built on line through MATLAB and ATP-EMTP, and the characteristic that when the inductive lightning acts on an A-phase line, the action current of a lightning arrester on the line is caused is detected. Meanwhile, the action current of the lightning arrester is detected under the same condition under the condition of direct lightning, and the direct lightning and the inductive lightning are successfully identified by adopting frequency band analysis. It can be seen from simulation verification that the method is correct and effective.

Description

technical field [0001] The invention relates to a method for identifying direct lightning strikes and induced lightning strikes in a distribution network based on the analysis of the operating current frequency band of an arrester, and belongs to the technical field of relay protection for electric power systems. Background technique [0002] In the total faults of the power system, the distribution line faults caused by lightning strikes account for a large proportion. According to the operation experience, in the distribution network, due to the shielding effect of the surrounding buildings and trees on the overhead lines, the lightning strikes the overhead lines directly. The possibility is small, and most of the faults are caused by lightning strikes on objects or the ground near the overhead line, that is, the induced lightning overvoltage is the main form of faults in the medium and low voltage distribution network. When direct lightning strikes or induced lightning st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F17/14G06F113/04
CPCG06F30/20G06F17/148G06F2113/04
Inventor 肖麟祥何国斌熊杰黄华
Owner DALI POWER SUPPLY BUREAU YUNNAN POWER GRID
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