Transmission line lightning monitoring and early warning method based on small radar

Abstract

The invention discloses a transmission line lightning monitoring and early warning method based on a small radar. The method comprises the steps of (1) obtaining a small radar multi-layer radar echo reflectivity data, (2) judging real lightning cloud, (3) using a mode of image segmentation to find out a boundary, and drawing a thunderstorm area, (4) obtaining an echo radial speed corresponding to the thunderstorm area in the step (1), tracking multiple times of volume scanning, deducting the tangential development speed of the area, and calculating the movement direction and speed of the thunderstorm area, (5) estimating the thunderstorm activity intensity of a position where thunderstorm appears at a future time K, (6) matching a thunderstorm prediction area according to a transmission line tower coordinate, considering the lightning withstand level of a tower, and carrying out alarming. According to the invention, the combination of a millimeter wave radar and a lightning positioning instrument is employed, the monitoring range is wide, the accuracy is high, in the lightning to line tower early warning process, the intensity of the lightning and the withstand level of the tower are considered, the risk warning is more close to reality, and the precision is high.

Description

technical field [0001] The invention relates to the field of lightning monitoring and early warning of transmission lines, in particular to a lightning monitoring and early warning method for transmission lines based on a small radar. Background technique [0002] Thunderstorm weather is a kind of weather phenomenon in natural phenomena. In recent years, disasters caused by lightning have occurred frequently, and are showing a rapid upward trend. Lightning is extremely harmful to the safe operation of transmission lines. Lightning tripping accounts for a large proportion of transmission line faults. Preventing lightning tripping can greatly reduce transmission line faults, thereby reducing the frequency of accidents in the power grid. After years of exploration, my country's transmission line lightning protection has basically formed a series of effective conventional lightning protection methods, such as reducing grounding resistance, erecting lightning protection lines, i...

AI Technical Summary

Problems solved by technology

Compared with the traditional method, the present invention uses radar and lightning positioning instruments at the same time, so that the positioning hardware is more comprehensive and targeted, and multiple data sources are obtained for prediction and evaluation; in order to overcome that radar and satellites can only identify clouds, they cannot To judge whether lightning may occur in the cloud layer, the lightning locator screens the part with high possibility of lightning

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