Wind turbine blade with lightning current limiting function and manufacturing process thereof

Abstract

The invention discloses a wind turbine blade with a lightning current limiting function and a manufacturing process thereof, relating to a blade of a wind turbine. The wind turbine blade is structurally characterized in that a lightning arrester (20) is arranged at the top end of a blade body (10); a flange (30) is arranged at the tail part of the blade body (10); a semi-conductor coating (50) is coated on the outer layer of the blade body (10); and a protective coating (60) is coated on the outer layer of the semi-conductor coating (50). The manufacturing process is well compatible with conventional manufacturing process of the wind turbine blade; the semi-conductor coating has a current limiting function and can reduce the magnitude and the amplitude of the lightning current, so damage caused by lightning is reduced; the semi-conductor covers the entire blade, thus having a lightning protection function on the entire blade; and the wind turbine blade is convenient to maintain and long in service life.

Description

technical field [0001] The present invention relates to a wind power generator blade (wind power blade for short), in particular to a wind power blade with the function of limiting lightning current (including current amplitude and steepness) and its manufacturing process. Background technique [0002] Wind energy is a renewable green energy; wind power (wind power generation) is an industry vigorously developed by countries all over the world and in my country. Wind generators (referred to as fans) are devices that use wind energy to generate electricity; wind turbine blades capture wind energy and convert it into electrical energy through generators, which are the key components of wind generators. Wind turbines are often located on mountain ridges, seashores and seas, and the height of wind turbines ranges from tens of meters to nearly 200 meters, which is the highest position in the wind field; from the perspective of lightning, the wind turbine is the lightning rod for ...

AI Technical Summary

Problems solved by technology

[0005] First, because the area of ​​the metal strip (or cable) is small compared with the blade, it is difficult to ensure that the lightning strike point is on the metal strip (or cable). Once the lightning strike point occurs outside the metal strip (or cable), the powerful The lightning current will damage or destroy the blade;

[0006] The second is that the powerful lightning current produces thermal and mechanical effects on the path of its transmission to the ground, causing direct and potential damage to the blades, bearings and transmission components;

[0007] The third is that the ground potential rise and electromagnetic induction caused by lightning current due to its large amplitude and steepness will cause harm to personnel and wind turbine equipment.

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