Wind generating set blade lightning stroke protection system

Abstract

The lightning stroke protection system comprises a metal net and a down lead which are connected through a metal net connecting device, the metal net is laid on the outer surface of the tip area of a blade shell, lightning is intercepted on the surface of the blade, the lightning stroke lightning receiving area is greatly increased, and structural damage to the blade tip shell is effectively reduced; the metal net is connected with the tip lightning arrester; the downlead is arranged in other areas in the blade outside the metal net, and the problem of lightning breakdown of the downlead does not exist in a tip area; the metal net is connected with the connecting base through the metal net connecting device after being folded, and the connecting base is arranged on the rear edge side of the blade shell. The connecting base is provided with the wiring port, direct connection between the down lead and the connecting base is achieved, switching through a wiring terminal and a bolt is not needed, the tip lightning arrester and the metal net are integrally connected through welding, and contact resistance is reduced. The lightning protection system is high in lightning receiving efficiency, effectively reduces internal breakdown, and is firm in integral connection and rapid in installation.

Description

Technical field [0001] The invention belongs to the technical field of wind turbine blades, specifically a lightning strike protection system for wind turbine blades. Background technique [0002] In recent years, the installed capacity of wind power has grown rapidly, and wind turbines have gradually developed toward large megawatts, large capacity, and large-scale. Wind turbine blades are an important component of wind turbines. During rotation, the wind turbine blade tip is located at the highest position of the unit. In addition, offshore Wind turbine blades are in a humid and thunderstorm-prone environment, and the probability of wind turbine blades being struck by lightning is greatly increased, especially the blade tips. If the blades are not well protected against lightning strikes, it will cause damage to the wind turbine blades and cause huge maintenance costs. The current general lightning protection system usually installs metal down-conductors inside the blades...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above problems, the present invention proposes a lightning strike protection system for blades of wind power generators, which avoids frequent breakdown of the down-conductor inside the blade tip of the wind power blade, small lightning area, and weak connection between the down-conductor and the lightning terminal. problem, and this lightning strike protection system has high lightning strike efficiency, effectively reduces internal breakdown, integrated connection is firm, and installation is fast

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