Lightning strike positioning and lightning current inversion method of power transmission line

Abstract

The invention relates to a lightning strike positioning and inversion method of a power transmission line and belongs to the technical field of high-voltage experimenting equipment and measuring. The method includes by inquiring data monitored by an online lightning current monitoring system, acquiring waveform parameters of lightning current, striking a pole tower, after being shunted through the pole tower and the power transmission line; by inquiring data monitored by a lightning positioning system, acquiring lightning strike time, lightning strike area, lightning current amplitude and lightning return strike time data; combining a theory relationship table and a theory curve and taking error of the lightning positioning system into consideration to acquire position range of a lightning strike point, and inversing feature parameters of lightning current waveform through simulating calculation. The lightning strike positioning and lightning current inversion method is high in positioning accuracy and beneficial to quick finding and repairing of line lightning strike damage, lightning strike fault finding and repairing time of the power transmission line is saved, real lightning current waveform can be restored, a basis is provided for scientific studying of lightning causes and lightning current features, and data are provided for studying of lightning protection measures and lightning overvoltage protection.

Description

technical field [0001] The invention relates to a lightning strike location and lightning current inversion method for a transmission line, belonging to the technical field of high-voltage test equipment and measurement. Background technique [0002] According to incomplete statistics, 3000-4000 casualties are caused by lightning strikes in my country every year, and property losses reach an astonishing 20 billion yuan. Lightning disasters have become one of the most destructive meteorological disasters. The electromagnetic transient phenomenon caused by lightning belongs to the scope of electromagnetic pollution, and electromagnetic pollution is recognized as the fourth largest pollution in the world after water pollution, air pollution and noise pollution. With the modernization of industrial and agricultural production and people's lives, the requirements for the reliability and service quality of service systems and facilities such as railways, aviation, finance, electri...

AI Technical Summary

Problems solved by technology

[0006] When lightning strikes a tower or transmission line, a lightning current with a large amplitude will pass through the line where the lightning strike point is located, which may cause damage to the line

At the same time, flashover may occur at the insulator near the lightning strike point. After the flashover occurs, the lightning current flows through the flashover area, which will emit heat and ablate the insulator, affecting the strength and insulation properties of the insulator.

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