Experimental Study of the Influence of the Blade Rotation on Triggered Lightning Ability of Wind Turbine's Blades

被引：0
|
作者：
Wen X. [1 ]
Qu L. [1 ]
Wang Y. [1 ]
Si T. [1 ]
Xu J. [1 ]
Lan L. [1 ]
机构：
[1] School of Electrical Engineering, Wuhan University, Wuhan, 430072, Hubei Province
来源：
| 1600年 / Chinese Society for Electrical Engineering卷 / 37期
关键词：
Blade; Rotation; Scaling test; Up-and-down method; Wind turbine;
D O I：
10.13334/j.0258-8013.pcsee.160885
中图分类号：
学科分类号：
摘要：
Compared with other lightning targets on ground, the most notable feature of wind turbine is that its blades are generally in rotating state during lightning strike. In order to study the specialty and mechanism of the influence of blade rotation on triggered lightning ability, the paper conducted some lightning discharge comparison tests under different status (stationary and rotating blades) on typical 2 MW wind turbines' 1:30 miniature. In these tests, a negative polarity 250/2500 μs standard operating wave on the high voltage electrode was applied and the up-and-down method was adopted for 50% discharge voltage. The discharge process was observed, and the experimental results show that under the condition of 1 m and 1.3 m gaps, the breakdown voltage would get higher and the location of the leader connection point would get closer to blade tips with increasing speed, which means that blade rotation reduces triggering lightning ability. Through the analysis of lightning discharge process, it is found that the rotation of the blades changes the charge distribution on blade tip region, thus weakening the upward leader development on the blade tip, which affects the discharge development process. This result provides a reference for lightning protection of wind turbines. © 2017 Chin. Soc. for Elec. Eng.
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页码：2151 / 2158
页数：7
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