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A power line lightning trip-out rate prediction method based on comprehensive factors

A technology of lightning trip rate and comprehensive factors, applied in the field of power system, can solve the problems of many factors affecting the trip rate of lightning stroke, numerical changes, no way to take into account, etc.

Inactive Publication Date: 2019-03-01
STATE GRID TIANJIN ELECTRIC POWER +1
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Problems solved by technology

For a long time, many people have tried to find a fixed formula or routine to calculate the lightning trip rate. However, due to changes in the values ​​of various factors and differences in conditions in various regions, the values ​​will change. Therefore, various corrections have also appeared. method, but no matter how it is corrected, the trip rate due to lightning strikes has many influencing factors, and there is no way to take all factors into account

Method used

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  • A power line lightning trip-out rate prediction method based on comprehensive factors
  • A power line lightning trip-out rate prediction method based on comprehensive factors
  • A power line lightning trip-out rate prediction method based on comprehensive factors

Examples

Experimental program
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Effect test

Embodiment 1

[0086] Step 1: Select samples to obtain parameters that affect the lightning trip rate.

[0087] The grounding resistance of the tower, the protection angle of the lightning conductor, the height of the tower, the number of insulators, and the inclination angle of the ground are selected as five factors that affect the lightning tripping rate. Also record the lightning tripping rate, the grounding resistance of the tower, the protection angle of the lightning conductor, the tower height, the number of insulators, and the ground inclination in order as D, C1, C2, C3, C4, and C5.

[0088] Step 2: Carry out an experiment and record the relevant values ​​of the lightning tripping rate and influencing factors.

[0089] Use special equipment for power engineering to measure. When measuring, take the average value of multiple measurements. Or, obtain it from the power design department. The power design department has specific data when designing line towers and power lines, and the...

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Abstract

The invention discloses a power line lightning trip-out rate prediction method based on comprehensive factors. The influence of different factors on the lightning trip-out rate is studied; A rough settheory is adopted, lightning trip-out rate is taken as a decision attribute to carry out attribute reduction on a plurality of factors, so that a plurality of factors which are crucial to the lightning trip-out rate are effectively extracted, and a group of association rules for predicting the lightning trip-out rate are extracted on the basis, so that rapid prediction of the lightning trip-out rate is realized. The prediction method is simple, only related values of related factors need to be measured, the related values serve as the condition, the lightning trip-out rate can be predicted bymatching a set of association rules of the lightning trip-out rate, and various complex calculation processes are avoided. The prediction method also has generalization and transportability, and other accidents in the power system can be predicted according to related factors.

Description

technical field [0001] The invention relates to the technical field of electric power systems, in particular to a method for predicting the lightning strike trip rate of power lines based on comprehensive factors. Background technique [0002] The reliability of the transmission line is very important to the safe and stable operation of the entire power system. Therefore, once a trip accident occurs on the power line, it will bring serious harm to the safe and stable operation of the entire power system. The main reason for tripping is that the number of tripping accidents caused by lightning strikes on high-voltage power lines each year accounts for about 50%-60% of the total tripping times. In some places, the number of trippings is higher due to the complex terrain. Therefore, the study of lightning tripping rates It is very necessary for the power supply reliability of the power system. [0003] At present, the research on the lightning tripping rate mainly focuses on t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q50/06
CPCG06Q10/04G06Q50/06
Inventor 李娜王国玲田雪聪赵伟安捷毕艳会李颖李粟
Owner STATE GRID TIANJIN ELECTRIC POWER
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