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Test device and method for simulating lightning induced by wind turbine blades

A technology for wind turbines and test devices, which is applied in the directions of measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problems of complex maintenance process, high maintenance costs, and influence of blade power generation.

Active Publication Date: 2018-03-16
CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The damage of the blades has the greatest impact on the power generation, requires the most maintenance costs, and the maintenance process is also the most complicated. Serious lightning strikes on the blades may even cause the entire wind turbine to be scrapped

Method used

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  • Test device and method for simulating lightning induced by wind turbine blades
  • Test device and method for simulating lightning induced by wind turbine blades

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 As shown, it is a test device for simulating lightning induced by wind turbine blades, including electrode 1 and wind turbine model 2 (two-blade type). The ratio is 1:100, the tip of the blade of the wind turbine model 2 is provided with an air receptor 21, and the tower barrel of the wind turbine model 2 is provided with a resistance group 22 electrically connected to the grounding device. The resistance group 22 includes a plurality of Resistors connected in series or / and in parallel (resistance groups have various types), the power and resistance of the resistors are 150W and 2Ω respectively, the resistance group 22 is electrically connected to the lightning receptor 21; the electrode 1 is electrically connected to the high-voltage lead 13, and the electrode The angle between 1 and the horizontal plane is an acute angle of 30°, the distance between the discharge end 11 of the electrode 1 and the lightning receptor 21, and the distance from the ground...

Embodiment 2

[0041] Such as figure 2 As shown, the difference from the first embodiment is that the wind turbine model 2 in the first embodiment is a two-blade type, while the wind turbine model 2 in the second embodiment is a three-blade type. Other than that, everything else is the same.

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Abstract

The invention discloses a test device and method for simulating lightning induced by a blade of a wind turbine. The test device for simulating lightning induced by a blade of a wind turbine includes an electrode and a model of a wind turbine. The tip of the blade of the model of a wind turbine is provided with a lightning receptor. The tower barrel of the wind turbine model is equipped with a resistance group electrically connected to the grounding device. The resistance group is electrically connected to the lightning receptor. The angle formed between the electrode and the horizontal plane is an acute angle. The distance between the discharge terminal and the lightning terminal is a preset distance S, and the distance between the discharge terminal and the ground is a preset distance D, both the preset distance S and the preset distance D are greater than zero, and the electrodes are electrically connected to the high-voltage lead. The above-mentioned test device is used to simulate the actual situation that the wind turbine blades are struck by lightning, and the test method for simulating the wind turbine blades being struck by lightning is used to obtain relevant data about the wind turbine blades being struck by lightning. These data can be used for Help improve lightning protection measures for wind turbines.

Description

technical field [0001] The invention relates to a test device and method for simulating lightning induced by blades of wind turbines. Background technique [0002] With the development of wind power new energy technology, the capacity of wind turbines used for power generation has gradually increased, and the length of fan blades has increased from 30m to 50m to 60m or even longer. With the rise of offshore wind farms, more large-scale wind turbines are also installed in the ocean, but the special environment of the ocean makes wind turbines more likely to be struck by lightning. According to relevant German statistics, every hundred wind turbines in German wind farms The accident rate of lightning strikes in China is about 10%, and the damaged parts are mainly blades. In my country, Hainan Dongfang Wind Farm is the most severely damaged by lightning strikes. In recent years, only the lightning strike damage rate of wind turbine blades is 5.56%. Damage to the blades has th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00
Inventor 李炬添郑明阳熹彭千汤翔方超颖王羽
Owner CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD