Thunder damage protection risk automatic assessment method for power transmission line

A transmission line and automatic evaluation technology, which is applied in the electric power field, can solve problems such as poor pertinence, large investment, and ineffective results, and achieve the effects of reducing the tripping rate of lightning strikes, reducing investment, and improving the ability to resist lightning damage

Active Publication Date: 2013-11-27
SHENZHEN POWER SUPPLY BUREAU
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  • Description
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AI Technical Summary

Problems solved by technology

[0005] One is the lack of foresight and guidance, and it is impossible to find the weak link of line lightning protection in advance and take measures;
[0006] The second is that the pertinence is not strong, with

Method used

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  • Thunder damage protection risk automatic assessment method for power transmission line
  • Thunder damage protection risk automatic assessment method for power transmission line
  • Thunder damage protection risk automatic assessment method for power transmission line

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The method provided by Embodiment 1 includes:

[0045] Step 100, collect the parameters of typical towers and record the values ​​of the parameters, the parameters include lightning parameters, tower parameters, topography parameters, line parameters and ground lightning parameters;

[0046] Step 101, according to the parameters of a typical pole tower, establish a counterattack calculation model and a shielding calculation model; specifically, in the ATP Draw environment of the visual operation interface of the electromagnetic transient calculation program, respectively establish a lightning current double exponential wave model, a transmission line model, Tower wave impedance model and insulator flashover model to calculate the counterattack of typical towers.

[0047] Step 102, according to the parameters of the typical tower and the counterattack calculation model, calculate the counterattack trip rate n of the tower based on the electromagnetic transient calculatio...

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Abstract

The invention provides a thunder damage protection risk automatic assessment method for a power transmission line. The thunder damage protection risk automatic assessment method comprises the steps of collecting parameters of a typical pole tower and recording values of parameters comprising thunder parameters, pole tower parameters, landform parameters, line parameters and cloud-to-ground lightning parameters; establishing a back striking calculation model and a shielding failure calculation model according to the parameters of the typical pole tower; calculating the shielding failure trip-out rate n1 of the pole tower on the basis of electromagnetic transient calculation program and according to the parameters of the typical pole tower and the shielding failure calculation model; calculating the pole tower shielding failure trip-out rate n1=NgP1eta on the basis of a guiding developing model; calculating the average lightning stroke trip-out rate N according to the back striking trip-out rate n1 and the shielding failure trip-out rate n2; and performing grading on the whole line pole tower based on lightning stroke risks according to the average lightning stroke trip-out rate N. The pole tower with the severe anti-thunder situation can be found before lightning stroke faults occur in the line, modification measures are adopted ahead of time, and the lightning stroke trip-out rate of the power transmission line is reduced.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to an automatic assessment method for lightning protection risks of transmission lines. Background technique [0002] In the power system, the transmission lines are mostly located in the wilderness, and the span is very long, so it is easy to be struck by lightning. Although a variety of lightning protection technical measures have been taken, the trip rate due to lightning strikes is still high, which has become the most important threat to the safety and stability of the power system. [0003] The lightning protection work of transmission lines has been in a relatively passive situation for a long time, which is related to the random characteristics of lightning in nature on the one hand, and is also caused by ineffective technical management measures on the other hand. At present, lightning protection work mainly relies on experience guidance, and lightning protection m...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 黄文武鲁海亮王玮姚森敬文习山刘旭明贺振华蓝磊肖明杰
Owner SHENZHEN POWER SUPPLY BUREAU
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