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Wind turbine generator blade anti-thunder air-terminal system

A technology for wind turbines and blades, which is applied in the field of lightning protection and lightning protection system for wind turbine blades, which can solve problems such as lightning strikes on blades, achieve the effects of reducing the number of lightning strikes, reducing the possibility of surface discharge, and avoiding breakdown damage

Active Publication Date: 2018-04-24
CHINA ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention proposes a lightning protection and lightning protection system for wind turbine blades, aiming to solve the problem of lightning strikes on blades caused by the failure of the wind turbine blade lightning termination system in the prior art

Method used

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  • Wind turbine generator blade anti-thunder air-terminal system
  • Wind turbine generator blade anti-thunder air-terminal system
  • Wind turbine generator blade anti-thunder air-terminal system

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Embodiment Construction

[0023] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0024] refer to figure 1 and figure 2 , the wind turbine blade lightning protection system of the embodiment of the present invention includes: a blade tip...

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Abstract

The invention provides a wind turbine generator blade anti-thunder air-terminal system. The system comprises a blade tip air termination, a shielding device, a lower guiding body, and at least two pairs of blade intermediate air terminations. The blade tip air termination and each blade intermediate air termination are respectively arranged on the blade tip of a wind turbine generator blade and the position of a blade surface, far away from the blade tip. The lower guiding body is arranged in the wind turbine generator blade, one end is connected with the blade tip air termination, and the other end is connected with each pair of blade intermediate air terminations, and the lower guiding body is used to lead lightening current into ground. The shielding device is arranged on two surfaces of the wind turbine generator blade, one end is connected with the blade tip air termination, and the other end is connected with the blade intermediate air termination, and the shielding device is used to shield discharge effect of the surface of the lower guiding body. Through embedding the metal shielding device on a suction surface and a pressure surface of the blade, surface electric field ofthe internal lower guiding body can be effectively shielded, and possibility of discharge of the surface of the lower guiding body is reduced, so that probability of failure lightning protection caused by failure of an air-terminal structure is effectively reduced, and the number of lightning stroke subjected to the blade is reduced.

Description

Technical field [0001] The present invention relates to the technical field of lightning protection for wind turbine blades, and specifically to a lightning protection and lightning protection system for wind turbine blades. Background technique [0002] Wind turbines are generally installed in open plains or mountain tops, and are more susceptible to lightning strikes than ordinary buildings. As the capacity of wind turbines increases, the length of the blades increases, and the number of lightning strikes also increases significantly. Operation experience shows that the height exceeds 150m. The annual number of lightning strikes on the blades of the 5MW unit is much higher than that of the small-capacity wind turbine units in the 1990s. This is consistent with the IEC61400 statistics that the most common damage to newly produced wind turbines is the wind turbine blades. In addition, the manufacturing and maintenance costs of the unit's blades account for 15-20% of the ent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D80/30
CPCF03D80/30Y02E10/72
Inventor 贺恒鑫顾建伟陈维江时卫东殷禹边凯赵晓路杨科石可重何天宇黄胜鑫张兆华向念文李志军
Owner CHINA ELECTRIC POWER RES INST
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