Lightning disaster-reducing method applicable to wind power generating unit

Abstract

The invention relates to the field of lightning protection in wind power generation, in particular to a lightning disaster-reducing method applicable to a wind power generating unit. Radial conductive needle-shaped metal or radial conductive needle-shaped coatings are installed on the two surfaces of the upper end of a blade of the wind power generating unit, wherein (1) is the blade; and (2) is a radial conductive needle. By the method, before thundercloud performs electrical discharge on the wind power generating unit, the distribution rule of space charges in an electrical field of the thundercloud is distorted, so that the discharge voltage of lightning on an object is changed.

Description

technical field [0001] The invention relates to the field of lightning protection for wind power generation, and relates to a method for reducing lightning disasters applicable to wind turbines. Background technique [0002] Lightning (Lightning, also known as lightning) refers to the phenomenon of pulse discharge that occurs inside charged clouds, between clouds, or between clouds and the ground, accompanied by strong flashes and loud noises. pulse of lightning [0003] The current peak can reach hundreds of kiloamperes and generate a powerful electromagnetic pulse (LEMP). The transient overvoltage of lightning interference includes two parts: one is the overvoltage entering the equipment through connecting external lines; the other is the overvoltage generated inside the electronic equipment due to lightning electromagnetic coupling. [0004] At present, our country adopts the method of releasing lightning energy through lightning rods to prevent lightning strikes in nat...

AI Technical Summary

Problems solved by technology

Since the electrical equipment and control system of wind turbines are equipped with various electronic equipment for communication, regulation and data processing purposes, compared with electrical equipment, these equipment generally have a common weakness, that is, low insulation strength, overvoltage Poor tolerance and sensitive to electromagnetic interference, once they are violated by lightning electromagnetic interference, they will fail to work at least, and be permanently damaged at worst, causing outage accidents

We should realize that due to the obvious randomness of lightning phenomena, it is difficult to completely prevent electrical equipment from being damaged by lightning under the existing protection technology conditions.

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