Intelligent prediction method for ultra-high plant safe distance of overhead transmission line

An overhead transmission line, safe distance technology, applied in forecasting, instrumentation, data processing applications, etc., can solve problems such as tree flashing faults

Active Publication Date: 2015-03-25
HEYUAN POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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Problems solved by technology

[0014] The purpose of the present invention is to propose an intelligent prediction method for the safety distance of superhigh plants on overhead transmission lines, which can effectively solve the problem of tree flashover

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  • Intelligent prediction method for ultra-high plant safe distance of overhead transmission line
  • Intelligent prediction method for ultra-high plant safe distance of overhead transmission line
  • Intelligent prediction method for ultra-high plant safe distance of overhead transmission line

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Embodiment Construction

[0048] In the following, the present invention will be further described in conjunction with the drawings and specific embodiments.

[0049] 1. Analysis of influencing factors of tree flash failure:

[0050] The contradiction between the sag change of the conductor and the height of the tall plants in the overhead corridor is the main reason for inducing the last type of tree flash failure. There are two main influencing factors, one is the natural growth of trees, and the other is the increase of wire sag. Under stable operation conditions, the line sag can be expressed as:

[0051] f=g(i,θ,v,l) (2)

[0052] In the formula: f is the line sag; i is the line current; θ is the ambient temperature of the line; v is the wind speed; l is the span between towers; g is a simple functional relationship.

[0053] It can be seen from the formula that when the conductor span is constant, the main factors that determine the sag change are the line current and the temperature and wind s...

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Abstract

The invention relates to an intelligent prediction method for the ultra-high plant safe distance of an overhead transmission line. The method includes the steps that a tree height growth model is selected, the tree height below wires is predicted, and the predicted tree height C is acquired; calculation is conducted according to the formula shown in the specification, and the predicted span interval delta h is acquired; the predicted span interval delta h is compared with the preset electrical safe distance, and then tree processing early warning information is acquired. By the adoption of the method, the operating safety and reliability of the overhead line can be effectively improved.

Description

technical field [0001] The invention relates to a technology for measuring the safety distance of an overhead power transmission line. Background technique [0002] With the improvement of the ecological awareness of the whole society and the promotion of economic fast-growing forests, it is more and more common to plant a large number of fast-growing super-high plants such as Eucalyptus gigantea in the route passage. At the same time, a considerable part of the high-voltage overhead lines are located in mountainous areas, and a large number of them cross forests. The corridors of mountainous lines are often steep or have no way to go, and the geographical environment is poor, making inspection difficult. Therefore, in recent years, the tree flash failures caused by the growth of super tall trees have been increasing year by year. [0003] According to statistical data, in 2010, there were 1125 trips on transmission lines of 110kV and above in Guangdong Power Grid, of which...

Claims

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Application Information

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IPC IPC(8): G06Q10/04G06Q50/06
CPCG06Q10/04G06Q50/06
Inventor 刘焕强陶飞达崔春生谢裕宏戴小庞沈志毅文波张红南陈晓波游景方杨柳辉黄志雄黄东舟陈绍周
Owner HEYUAN POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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