Active Lightning Protection Method Based on Statistical Characteristics of Historical Lightning Trajectories

Abstract

The invention provides an active lightning protection method based on statistical characteristics of historical lightning movement tracks. The method comprises the following steps: after selecting a lightning protection target area, selecting all historical lightning data within a peripheral area of the target area from a lightning positioning system; carrying out descending sorting on the lightning dates according to the daily lightning frequency, and selecting first about 20% of lightning dates for analysis; decomposing each lightning date into a plurality of time periods according to certain time, calculating the lightning density center of each time period and then drawing the movement track of the lightning density center of each lightning date; on this basis, determining a probabilistic lightning movement track of the target area according to the statistical characteristics of the historical lightning movement tracks of the first 20% of lightning dates; and selecting the same direction of the lightning movement tracks with over 30% concentration as the maximum probability lightning movement track direction, and selecting proper positions for erecting a lightning rod and a lightning conductor within 20km of upstream area, in the maximum probability lightning movement track direction, of the target area. Therefore, the lightning probability of the target area can be significantly reduced.

Description

technical field [0001] The invention relates to the lightning protection technology of offshore wind farms, in particular to an active lightning protection method based on the statistical characteristics of historical lightning moving tracks of a lightning positioning system. Background technique [0002] At present, most of the lightning protection measures adopted in the technical field of power system lightning protection are passive lightning protection. For some particularly important, lightning-sensitive and geographically concentrated structures such as oil refineries and oil depots, independent lightning rods and lightning conductors may be erected around the periphery of the factory area to discharge thundercloud charges in advance and protect the safety of important structures in the factory area. [0003] The operation experience of a large number of wind turbines at home and abroad shows that lightning disasters pose a prominent threat to the safe and reliable op...

AI Technical Summary

Problems solved by technology

This reduces the blindness of lightning protection to a certain extent and strengthens the pertinence, but in essence, it still protects all transmission areas in the whole section, but the protection measures are different.

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