Design method for lightning receptor for lightning stroke current of blade of wind driven generator

A technology of wind turbine blades and lightning receptors, which is applied in wind turbines, wind power generation, mechanical equipment, etc., can solve problems such as blade damage and damage, and achieve the effects of improving service life, increasing lightning lightning receiving rate, and reducing lightning damage

Active Publication Date: 2017-10-24
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
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Problems solved by technology

[0006] For the current wind turbine blades, there is a problem that when a lightning strike occurs, the lightning does not hit the lightning receptor but hits other parts of the blade, resulting in damage to the blade

Method used

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  • Design method for lightning receptor for lightning stroke current of blade of wind driven generator
  • Design method for lightning receptor for lightning stroke current of blade of wind driven generator
  • Design method for lightning receptor for lightning stroke current of blade of wind driven generator

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Embodiment Construction

[0048] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific examples.

[0049] In this embodiment, taking the current mainstream MW-level wind turbine blades as an example, the following steps are used to design the lightning-termination system:

[0050] 1) Establish the initial model of the lightning receptor system according to the matching target blade model and structural size. The initial model of the lightning receptor system includes metal blade tip 1, metal trailing edge section 3, multiple cylindrical lightning receptors 4, Lower leads 5 and metal connectors 6, such as figure 1 , 2 shown. In this embodiment, the metal blade tip 1, the metal trailing edge section 3, the cylindrical air receptor 4, the lower lead 5, and the metal connector 6 are all made of aluminum. Among them, the metal blade tip 1, the metal trailing edge section...

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Abstract

The invention discloses a design method for a lightning receiving system for the lightning stroke current of a blade of a wind driven generator. A blade lightning receptor system integrating a metal blade tip, a metal tail edge and a cylindrical lightning receptor is designed, so that effective lightning receiving for the lightning stroke current of the blade can be realized. With the design method, the influence of the lightning receiving system on the pneumatic and structural performance of the blade is guaranteed to be within a permissible range while the effective lightning receiving effect for the lightning stroke current is realized.

Description

Technical field [0001] The invention relates to the technical field of wind power generation in the machinery industry, and in particular to the structural type and design method of a horizontal-axis wind power blade lightning receptor system. The method constructs a metal blade tip, a metal trailing edge and a columnar air-termination system. The integrated blade air-termination system and its design method can achieve effective air-termination of blade lightning current. Background technique [0002] The problem of lightning strike damage to wind turbine blades is an important concern in the design, manufacturing and operation of wind turbine blades. Wind turbines operate in wild environments. The blades of modern wind turbines are getting longer and longer, and the blade towers are getting taller and taller. The probability of blades being damaged by lightning strikes is also increasing. Although existing large-scale wind turbines are all designed with lightning protect...

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 石可重赵晓路李苏威
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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