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Power transmission line thunder early warning method

A technology for lightning early warning and power transmission lines, which is applied in the measurement of electrical variables, electromagnetic field characteristics, measuring devices, etc., and can solve problems such as failure of lightning early warning

Inactive Publication Date: 2017-08-11
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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AI Technical Summary

Problems solved by technology

[0005] The purpose of this application is to provide a lightning warning method for transmission lines to solve the problem that lightning cannot be warned in the prior art

Method used

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  • Power transmission line thunder early warning method
  • Power transmission line thunder early warning method
  • Power transmission line thunder early warning method

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Embodiment Construction

[0033] refer to figure 1 , which shows a flow chart of a lightning warning method for a transmission line provided in an embodiment of the present application. The method is not limited to the voltage level or transmission capacity of the transmission line. The method includes the following steps:

[0034] Step S101, obtaining the electric field strength of the protected area;

[0035] Specifically, the protected area mentioned in this application refers to the area where the transmission line is located, for example, the area where the high-voltage overhead transmission line is located in the mountains and plains is the protected area. There is an electric field in the atmosphere, and when a thunderstorm occurs, the intensity of the atmospheric electric field will fluctuate irregularly. Based on this, an atmospheric electric field meter is installed near the protected area, and the atmospheric electric field meter monitors the change of the atmospheric electric field intensi...

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Abstract

The invention discloses a power transmission line thunder early warning method. The power transmission line thunder early warning method includes the steps: acquiring the electric field intensity of the protected area; according to the electric field intensity, calculating the accumulated difference of the electric field; determining whether the accumulated difference of the electric field is greater than the accumulated difference threshold of the electric field, and according to the determination result, obtaining the electric field intensity accumulated difference grade; if the accumulated difference of the electric field is greater than the accumulated difference threshold of the electric field, acquiring the thunder positioning information; according to the thunder positioning information, determining the thunder distance early warning grade; and according to the electric field intensity accumulated difference grade and the thunder distance early warning grade, obtaining the thunder early warning grade. The power transmission line thunder early warning method initially determines whether the thunder occurs according to the accumulated difference of the electric field, and then finally obtains the thunder early warning grade according to the thunder positioning information. The power transmission line thunder early warning method can accurately perform thunder early warning on the power transmission line through two links.

Description

technical field [0001] The present application relates to the field of lightning protection for transmission lines, in particular to a lightning early warning method for transmission lines. Background technique [0002] Lightning is one of the most common natural phenomena, which is very harmful to human beings, seriously threatens the safety of the power system, affects the reliability of power supply, and is listed as the number one environmental factor of power interruption. In recent years, with the increase of power grid capacity, the grid structure has become denser, the voltage level and transmission line towers have also become higher and higher, and overhead transmission lines are everywhere, passing through many areas prone to lightning strikes. The number of line outages caused by lightning strikes is increasing, and the situation of lightning trips on high-voltage overhead transmission lines is severe. Trips caused by lightning strikes account for 40% to 70% of t...

Claims

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Application Information

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IPC IPC(8): G01R29/08
CPCG01R29/0842
Inventor 颜冰周仿荣郭晨鋆潘浩李国彬
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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