Lightening damage early-warning method and system for electric transmission line

Abstract

The invention relates to a lightening damage early-warning method and system for an electric transmission line. The method includes the following steps that first, weather, satellite, radar and lightening positioning system data are collected, and lightening early-warning parameters at some period in the future are obtained through a comprehensive lightening prediction algorithm; second, according to different lightening overvoltage formation mechanisms, shielding failure and back striking calculation models are selected respectively, calculation is performed through the lightening early-warning parameters and line characteristic parameters, and the lightening trip probability of the electric transmission line is predicted; third, the lightening trip probability of the line is evaluated, the lightening trip probability of each base electric transmission line pole tower is compared with a determined line trip risk early-warning threshold value, and different levels of early-warning signals are obtained. Through the lightening damage early-warning method and system for the electric transmission line, lightening damage to the electric transmission line can be early warned effectively and timely, and technological support is provided for lightening protection and disaster relief of the electric transmission line.

Description

technical field [0001] The invention relates to the field of lightning monitoring and early warning of electric power systems, in particular to a lightning damage early warning method for transmission lines and a system thereof. Background technique [0002] At present, there are three main methods of early warning of thunderstorm activity: [0003] 1. Thunder potential forecast [0004] Thunder and lightning are a strong weather phenomenon accompanied by convective weather, so the potential forecast of thunder and lightning on a large temporal and spatial scale is actually the forecast of the possibility of strong convective weather. [0005] 2. Thunder and lightning nowcasting [0006] Nowcasting refers to the weather forecast of 0 to 2 hours, and the real-time observation data is the main decision-making basis. For the nowcasting of thunder and lightning, the close correlation between thunder and lightning activities and strong convective activities is used, and the in...

AI Technical Summary

Problems solved by technology

[0009] (1) The equipment is complicated and the initial investment is large;

[0010] (2) The positioning system itself has certain errors and detection dead zones;

[0011] (3) Terrain factors have great interference to the detection station, and the error is large;

[0012] (4) The accurate positioning of the tower struck by lightning cannot be realized;

[0013] (5) There is an error in the calculation of the lightning current amplitude by the positioning system, which cannot be actually checked at present;

[0014] (6) The lightning current waveform cannot be given

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