A method for reducing lightning disasters applicable to wind turbines

Abstract

The invention discloses a method suitable for a wind generation set to reduce lightning disasters. Metal in a radial conductive needle shape or coatings in a radial conductive needle shape are mounted on the upper portions of the double faces of a paddle of the wind generation set, and the metal or coatings are in series connection with air core inductors or magnetic core inductors, high-voltage diodes and a lightning conductor in the paddle of the wind generation set; the discharge speed of the lightning current slows down through the air core inductors or magnetic core inductors, and induction currents generated by electrical equipment and the number of channels transmitting charges in the direction from the ground to the paddle through the high-voltage diodes can be reduced; and on the contrary, conduction between the lightning current and the ground through the metal in the radial conductive needle shape is obstructed. The method suitable for the wind generation set to reduce the lightning disasters can reduce the probability that wind generation set equipment is damaged by lightning strokes to the maximum extent, and safe and reliable running of the electrical equipment can be ensured.

Description

technical field [0001] The invention relates to a method for reducing lightning disasters suitable for wind turbines. Background technique [0002] When a lightning strike occurs, the peak value of the lightning current can reach hundreds of kiloamperes, and a powerful electromagnetic pulse is generated. 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. [0003] At present, the method of releasing lightning energy through lightning rods is adopted to prevent lightning strikes in nature. Its principle is to lead lightning and itself. This principle can be applied to buildings. However, many industrial equipment operating in the natural environment cannot cause lightning to itself, such as wind turbines, power transmission lines, and computer technology, aerospac...

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, or be permanently damaged, resulting in 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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