Lightning protection system for wind generator set

Abstract

The invention discloses a lightning protection system of a wind-driven generator set, relating to a tower support, wherein, a generator cabin is arranged on the upper end of the tower support, a stander is arranged in the cabin, an electric generator is arranged on the stander and is connected with a gear box by a high-speed coupler, and the gear box is connected with a wheel hub with blades by a main shaft. The lightning protection system is characterized in that thunderbolt receptors and conductor devices are respectively arranged in the blades and on the cabin, and electric discharge devices are arranged on the wheel hub, the main shaft, the gear box, the stander and the tower support; and the thunderbolt receptors and the conductor devices are electrically connected with the electric discharge devices which are electrically connected with a grounding device arranged underground. The invention aims at avoiding the damages caused by the momentary extreme current and the voltage of lightning strike to the wind-driven generator set, in particular to a 1.5 MW speed change constant frequency double-fed asynchronous wind-driven generator set, and providing the lightning protection system effectively preventing the lightning strike from damaging the wind-driven generator.

Description

technical field [0001] The invention relates to a lightning protection system suitable for wind power generating sets. Background technique [0002] As an environmentally friendly energy industry, wind power generation has been paid more and more attention in the modern energy-constrained society, and the investment in wind power generators is also increasing. As we all know, wind power generators are generally installed in open areas in the wild. As the tallest building, it is extremely vulnerable to lightning strikes, especially in areas with high lightning strikes, and the damage caused by lightning to wind turbines is more serious. However, the existing lightning protection system for wind turbines is difficult to eliminate the impact of lightning and its strong current on the components of the wind turbine, which often causes significant losses, especially for 1.5MW variable-speed constant-frequency double-fed asynchronous wind turbines. Said that because it is equippe...

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Problems solved by technology

However, the existing lightning protection system for wind turbines is difficult to eliminate the impact of lightning and its strong current on the components of the wind turbine, which often causes significant losses, especially for 1.5MW variable-speed constant-frequency double-fed asynchronous wind turbines. Said that because it is equipped with many sophisticated mechanical and electrical equipment, if it is struck by lightning, the loss will be huge. At present, there is no reasonable way for the lightning protection of 1.5MW double-fed asynchronous generators in various industries.

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